在 python 中使用 string.strip() 提取特定列
using string.strip() in python to extract specific coloumns
import requests
from bs4 import BeautifulSoup
f = open('path to create /Price.csv','w')
errorFile = open('path to create /errorPrice.txt','w')
year = 2012; month = 1; day =1
if year<= 2016:
if day > 32:
month += 1
day = 1
if month >12:
year += 1
month = 1
url = 'http://nepalstock.com.np/main/todays_price/index/1/stock-name/desc/YTozOntzOjk6InN0YXJ0RGF0ZSI7czoxMDoiMjAxNi0wNi0wOSI7czoxMjoic3RvY2stc3ltYm9sIjtzOjA6IiI7czo2OiJfbGltaXQiO3M6MjoiNTAiO30?startDate='+str(year)+'-'+str(month)+'-'+str(day)+'&stock-symbol=&_limit=500'
res = requests.get(url)
soup = BeautifulSoup(res.text, 'lxml')
for child in soup.findAll('table'):
for row in child.findAll('tr')[2:]:
for col in row.findAll('td'):
try:
SN = col[3].string.strip()
f.write(SN+'\n')
except Exception as e:
errorFile.write (str(day) + '*************'+ str(e)+'***********************'+ str(col)+'\n')
pass
#day += 1
f.close
errorFile.close
“我想提取 col[3]，但它不起作用，而且我无法在错误文件中显示任何内容，尽管我是一个完全的菜鸟，可能在那一点上弄错了。”
在您实际出错之前，关于您的代码的一些事情：
使用with语句打开文件。无需手动打开和关闭文件。
如果您不打算打印网页，请使用 res.content 而不是 res.text。如果您将页面源传递给另一个函数，如 soup.parse，请始终使用 res.content.
关于您的问题：
row.findAll('td') 是所有 table 数据的列表，从中你需要 3d 索引，所以你不需要迭代它。
就这样使用：
for child in soup.findAll('table'):
for row in child.findAll('tr')[2:-4]:
cols = row.findAll('td')
SN = cols[3].string.strip()
print(SN)
此外，正如您在 -4 中看到的，最后 4 行也不包含任何数据。
你只需要索引返回的列表 SN = row.findAll('td')[3]，也没有必要删除换行符然后再放回去，这将获得所有 table 数据：
r = requests.get("http://nepalstock.com.np/main/todays_price/index/1/stock-name/desc/YTozOntzOjk6InN0YXJ0RGF0ZSI7czoxMDoiMjAxNi0wNi0wOSI7czoxMjoic3RvY2stc3ltYm9sIjtzOjA6IiI7czo2OiJfbGltaXQiO3M6MjoiNTAiO30?startDate=2016-01-04&stock-symbol=&_limit=500")
soup = BeautifulSoup(r.content)
table = soup.select_one("table.table-condensed.table-hover")
cols_tr = table.select_one("tr.unique")
print([td.text.strip() for td in cols_tr.find_all("td")])
for row in cols_tr.find_all_next("tr"):
print([td.text.strip() for td in row.find_all("td")])
将输出：
[u'S.N.', u'Traded Companies', u'No. Of Transaction', u'Max Price', u'Min Price', u'Closing Price', u'Traded Shares', u'Amount', u'Previous Closing', u'Difference Rs.']
[u'1', u'Yeti Development Bank Limited', u'7', u'143.00', u'140.00', u'140.00', u'1777.00', u'252897.00', u'143.00', u'-3.00']
[u'2', u'Western Development Bank Limited', u'1', u'315.00', u'315.00', u'315.00', u'500.00', u'157500.00', u'319.00', u'-4.00']
[u'3', u'Vijaya laghubitta Bittiya Sanstha Ltd.', u'162', u'1235.00', u'1172.00', u'1195.00', u'3188.00', u'3853176.00', u'1225.00', u'-30.00']
[u'4', u'United Insurance Co. (Nepal) Ltd.', u'111', u'550.00', u'500.00', u'540.00', u'50433.00', u'26399127.00', u'510.00', u'30.00']
[u'5', u'Unique Finance Ltd.', u'6', u'147.00', u'145.00', u'147.00', u'280.00', u'41116.00', u'143.00', u'4.00']
[u'6', u'Uniliver Nepal Limited', u'1', u'25500.00', u'25500.00', u'25500.00', u'80.00', u'2040000.00', u'25186.00', u'314.00']
[u'7', u'Tourism Development Bank Limited', u'2', u'233.00', u'229.00', u'229.00', u'51.00', u'11719.00', u'229.00', u'0.00']
[u'8', u'Tinau Development Bank Limited', u'1', u'300.00', u'300.00', u'300.00', u'154.00', u'46200.00', u'300.00', u'0.00']
[u'9', u'Taragaon Regency Hotel Limited', u'4', u'221.00', u'213.00', u'216.00', u'1550.00', u'334550.00', u'217.00', u'-1.00']
[u'10', u'Synergy Finance Ltd.', u'6', u'100.00', u'97.00', u'100.00', u'7991.00', u'793118.00', u'98.00', u'2.00']
[u'11', u'Swarojgar Laghu Bitta Bikas Bank Ltd.', u'9', u'2040.00', u'1921.00', u'2025.00', u'932.00', u'1859391.00', u'2000.00', u'25.00']
[u'12', u'Swabalamban Bikas Bank Limited', u'36', u'2025.00', u'1940.00', u'1940.00', u'3024.00', u'5970152.00', u'1949.00', u'-9.00']
[u'13', u'Surya Life Insurance Company Limited', u'27', u'826.00', u'773.00', u'790.00', u'5354.00', u'4322799.00', u'804.00', u'-14.00']
[u'14', u'Sunrise Bank Limited', u'7', u'415.00', u'408.00', u'415.00', u'2162.00', u'891160.00', u'412.00', u'3.00']
[u'15', u'Summit Micro Finance Development Bank Ltd.', u'4', u'2404.00', u'2311.00', u'2356.00', u'128.00', u'301158.00', u'2266.00', u'90.00']
[u'16', u'Subhechha Bikas Bank Limited', u'13', u'319.00', u'312.00', u'319.00', u'1130.00', u'356240.00', u'310.00', u'9.00']
[u'17', u'Standard Chartered Bank Limited', u'12', u'2590.00', u'2550.00', u'2555.00', u'805.00', u'2069500.00', u'2630.00', u'-75.00']
[u'18', u'Soaltee Hotel Limited', u'24', u'325.00', u'310.00', u'310.00', u'12580.00', u'3947660.00', u'320.00', u'-10.00']
[u'19', u'Siddhartha Investment Growth Scheme-1', u'1', u'15.56', u'15.56', u'15.56', u'1500.00', u'23340.00', u'15.61', u'-0.05']
[u'20', u'Siddhartha Insurance Ltd.', u'57', u'1075.00', u'1011.00', u'1075.00', u'10540.00', u'11093865.00', u'1052.00', u'23.00']
[u'21', u'Siddhartha Equity Orineted Scheme', u'4', u'9.55', u'9.50', u'9.55', u'7600.00', u'72527.00', u'9.65', u'-0.10']
[u'22', u'Siddhartha Bank Limited', u'20', u'605.00', u'591.00', u'597.00', u'4844.00', u'2904232.00', u'610.00', u'-13.00']
[u'23', u'Siddharth Finance Ltd.', u'8', u'196.00', u'180.00', u'193.00', u'677.00', u'128312.00', u'179.00', u'14.00']
[u'24', u'Shikhar Insurance Co. Ltd.', u'42', u'1424.00', u'1345.00', u'1379.00', u'6993.00', u'9595832.00', u'1377.00', u'2.00']
[u'25', u'Shangrila Development Bank Ltd.', u'3', u'380.00', u'375.00', u'378.00', u'657.00', u'248160.00', u'380.00', u'-2.00']
[u'26', u'Sewa Bikas Bank Limited', u'2', u'260.00', u'260.00', u'260.00', u'304.00', u'79040.00', u'255.00', u'5.00']
[u'27', u'Sanima Mai Hydropower Ltd.', u'33', u'768.00', u'750.00', u'760.00', u'2373.00', u'1808638.00', u'765.00', u'-5.00']
[u'28', u'Sanima Bank Limited', u'33', u'660.00', u'653.00', u'653.00', u'11727.00', u'7700213.00', u'661.00', u'-8.00']
[u'29', u'Sana Kisan Bikas Bank Ltd', u'37', u'1456.00', u'1400.00', u'1434.00', u'2863.00', u'4077092.00', u'1400.00', u'34.00']
[u'30', u'Sahayogi Bikas Bank Limited', u'1', u'375.00', u'375.00', u'375.00', u'10.00', u'3750.00', u'368.00', u'7.00']
[u'31', u'Sahara Bikas Bank Ltd.', u'2', u'980.00', u'980.00', u'980.00', u'20.00', u'19600.00', u'1000.00', u'-20.00']
[u'32', u'Sagarmatha Insurance Co. Ltd.', u'18', u'1122.00', u'1075.00', u'1075.00', u'2179.00', u'2389443.00', u'1095.00', u'-20.00']
[u'33', u'Sagarmatha Finance Limited', u'20', u'185.00', u'170.00', u'185.00', u'3484.00', u'629111.00', u'169.00', u'16.00']
[u'34', u'Rural Microfinance Development Centre Ltd.', u'15', u'690.00', u'680.00', u'686.00', u'1490.00', u'1016830.00', u'689.00', u'-3.00']
[u'35', u'Ridi Hydropower Development Company Ltd.', u'34', u'362.00', u'343.00', u'355.00', u'648.00', u'228537.00', u'346.00', u'9.00']
[u'36', u'Reliance Lotus Finance Ltd.', u'1', u'170.00', u'170.00', u'170.00', u'1000.00', u'170000.00', u'170.00', u'0.00']
[u'37', u'Reliable Microfinance Bittiya Sanstha Ltd.', u'1', u'327.00', u'327.00', u'327.00', u'10.00', u'3270.00', u'321.00', u'6.00']
[u'38', u'Reliable Development Bank Limited', u'11', u'300.00', u'295.00', u'295.00', u'482.00', u'143941.00', u'300.00', u'-5.00']
[u'39', u'Raptibheri Bikas Bank Ltd.', u'68', u'185.00', u'177.00', u'182.00', u'1406.00', u'252988.00', u'180.00', u'2.00']
[u'40', u'Purnima Bikas Bank Ltd.', u'4', u'318.00', u'300.00', u'318.00', u'404.00', u'124866.00', u'298.00', u'20.00']
[u'41', u'Prudential Insurance Co. Ltd.', u'113', u'720.00', u'630.00', u'698.00', u'31521.00', u'21716588.00', u'655.00', u'43.00']
[u'42', u'ProgressiveFinance Limited', u'2', u'126.00', u'126.00', u'126.00', u'240.00', u'30240.00', u'128.00', u'-2.00']
[u'43', u'Professional Diyalo Bikas Bank Ltd.', u'1', u'165.00', u'165.00', u'165.00', u'11.00', u'1815.00', u'164.00', u'1.00']
[u'44', u'Prime Life Insurance Company Limited', u'89', u'1595.00', u'1550.00', u'1565.00', u'12795.00', u'20032091.00', u'1555.00', u'10.00']
[u'45', u'Prime Commercial Bank Ltd.', u'19', u'499.00', u'485.00', u'490.00', u'4224.00', u'2064184.00', u'490.00', u'0.00']
[u'46', u'Premier Insurance Co. Ltd.', u'120', u'965.00', u'895.00', u'960.00', u'26299.00', u'24644627.00', u'878.00', u'82.00']
[u'47', u'Prabhu Insurance Ltd.', u'60', u'629.00', u'590.00', u'605.00', u'17659.00', u'10658300.00', u'617.00', u'-12.00']
[u'48', u'Pokhara Finance Ltd.', u'6', u'292.00', u'285.00', u'290.00', u'1616.00', u'463864.00', u'289.00', u'1.00']
[u'49', u'Pacific Development Bank Limited', u'1', u'333.00', u'333.00', u'333.00', u'53.00', u'17649.00', u'339.00', u'-6.00']
[u'50', u'Oriental Hotels Limited', u'1', u'417.00', u'417.00', u'417.00', u'22.00', u'9174.00', u'416.00', u'1.00']
[u'51', u'NMB Sulav Investment Fund-1', u'2', u'9.90', u'9.71', u'9.90', u'3500.00', u'34365.00', u'9.90', u'0.00']
[u'52', u'NMB Bank Limited', u'12', u'424.00', u'416.00', u'421.00', u'2559.00', u'1078416.00', u'416.00', u'5.00']
[u'53', u'NLG Insurance Company Ltd.', u'38', u'891.00', u'806.00', u'842.00', u'7364.00', u'6196657.00', u'825.00', u'17.00']
[u'54', u'Nirdhan Utthan Bank Limited', u'8', u'1690.00', u'1670.00', u'1688.00', u'996.00', u'1672610.00', u'1655.00', u'33.00']
[u'55', u'NIDC Capital Markets Ltd.', u'1', u'276.00', u'276.00', u'276.00', u'500.00', u'138000.00', u'281.00', u'-5.00']
[u'56', u'NIC Asia Bank Ltd.', u'168', u'1034.00', u'1010.00', u'1012.00', u'41061.00', u'41629557.00', u'1014.00', u'-2.00']
[u'57', u'NIBL Samriddhi Fund 1', u'7', u'9.95', u'9.90', u'9.95', u'20478.00', u'203256.10', u'9.80', u'0.15']
[u'58', u'Nerude Laghubita Bikas Bank Limited', u'18', u'2038.00', u'1977.00', u'1985.00', u'1880.00', u'3750102.00', u'1960.00', u'25.00']
[u'59', u'Nepal SBI Bank Limited', u'35', u'1510.00', u'1500.00', u'1500.00', u'7476.00', u'11234652.00', u'1503.00', u'-3.00']
[u'60', u'Nepal Life Insurance Co. Ltd.', u'14', u'3520.00', u'3410.00', u'3461.00', u'1661.00', u'5730070.00', u'3475.00', u'-14.00']
[u'61', u'Nepal Investment Bank Ltd. Promoter Share', u'6', u'591.00', u'585.00', u'591.00', u'3460.00', u'2039850.00', u'600.00', u'-9.00']
[u'62', u'Nepal Investment Bank Limited', u'37', u'700.00', u'692.00', u'700.00', u'9062.00', u'6311182.00', u'695.00', u'5.00']
[u'63', u'Nepal Insurance Co. Ltd.', u'23', u'618.00', u'579.00', u'615.00', u'7147.00', u'4295495.00', u'617.00', u'-2.00']
[u'64', u'Nepal Grameen Bikas Bank Ltd.', u'25', u'313.00', u'299.00', u'300.00', u'9497.00', u'2881799.00', u'314.00', u'-14.00']
[u'65', u'Nepal Doorsanchar Comapany Limited', u'2', u'660.00', u'659.00', u'660.00', u'1320.00', u'871000.00', u'660.00', u'0.00']
[u'66', u'Nepal Bank Limited', u'29', u'306.00', u'300.00', u'301.00', u'23894.00', u'7224247.00', u'310.00', u'-9.00']
[u'67', u'Nepal Bangladesh Bank Limited', u'49', u'436.00', u'430.00', u'436.00', u'17799.00', u'7713258.00', u'432.00', u'4.00']
[u'68', u'Neco Insurance Co. Ltd.', u'50', u'890.00', u'832.00', u'864.00', u'8940.00', u'7675605.00', u'868.00', u'-4.00']
[u'69', u'Naya Nepal Laghubitta Bikas Bank Ltd.', u'6', u'1475.00', u'1400.00', u'1410.00', u'1173.00', u'1663779.00', u'1497.00', u'-87.00']
[u'70', u'National Life Insurance Co. Ltd.', u'66', u'2630.00', u'2500.00', u'2526.00', u'9181.00', u'23332004.00', u'2550.00', u'-24.00']
[u'71', u'National Hydro Power Company Limited', u'31', u'115.00', u'110.00', u'112.00', u'34550.00', u'3886400.00', u'110.00', u'2.00']
[u'72', u'Narayani National Finance Limited', u'2', u'295.00', u'294.00', u'295.00', u'652.00', u'192140.00', u'295.00', u'0.00']
[u'73', u'NagBeli LaghuBitta Bikas Bank Ltd.', u'7', u'3570.00', u'3500.00', u'3500.00', u'303.00', u'1071390.00', u'3550.00', u'-50.00']
[u'74', u'NABIL Bank Limited Promotor Share', u'8', u'1341.00', u'1332.00', u'1332.00', u'1897.00', u'2534803.00', u'1340.00', u'-8.00']
[u'75', u'Nabil Bank Limited', u'28', u'1850.00', u'1800.00', u'1800.00', u'2496.00', u'4504646.00', u'1840.00', u'-40.00']
[u'76', u'Nabil Balance Fund 1', u'2', u'14.50', u'14.40', u'14.40', u'4797.00', u'69256.50', u'14.70', u'-0.30']
[u'77', u'Multipurpose Finance Company Limited', u'3', u'150.00', u'150.00', u'150.00', u'33.00', u'4950.00', u'150.00', u'0.00']
[u'78', u'Muktinath Bikas Bank Ltd.', u'19', u'720.00', u'690.00', u'701.00', u'4694.00', u'3281696.00', u'720.00', u'-19.00']
[u'79', u'Mount Makalu Development Bank Ltd.', u'1', u'506.00', u'506.00', u'506.00', u'20.00', u'10120.00', u'497.00', u'9.00']
[u'80', u'Mithila LaghuBitta Bikas Bank Ltd.', u'1', u'1322.00', u'1322.00', u'1322.00', u'24.00', u'31728.00', u'1297.00', u'25.00']
[u'81', u'Miteri Development Bank Limited', u'11', u'555.00', u'535.00', u'550.00', u'3168.00', u'1726818.00', u'535.00', u'15.00']
[u'82', u'Mirmire Microfinance Development Bank Ltd.', u'84', u'2310.00', u'2150.00', u'2225.00', u'840.00', u'1877350.00', u'2280.00', u'-55.00']
[u'83', u'Malika Bikas Bank Limited', u'3', u'247.00', u'245.00', u'245.00', u'850.00', u'208350.00', u'250.00', u'-5.00']
[u'84', u'Mahila Sahayatra Microfinance Bittiya Sanstha Ltd.', u'4', u'552.00', u'522.00', u'552.00', u'40.00', u'21480.00', u'512.00', u'40.00']
[u'85', u'Lumbini General Insurance Co. Ltd.', u'55', u'670.00', u'575.00', u'610.00', u'7968.00', u'4860101.00', u'610.00', u'0.00']
[u'86', u'Life Insurance Co. Nepal', u'25', u'3877.00', u'3780.00', u'3798.00', u'2958.00', u'11241460.00', u'3872.00', u'-74.00']
[u'87', u'Laxmi Value Fund-1', u'1', u'9.95', u'9.95', u'9.95', u'3300.00', u'32835.00', u'9.94', u'0.01']
[u'88', u'Laxmi Laghubitta Bittiya Sanstha Ltd.', u'22', u'1899.00', u'1757.00', u'1800.00', u'1010.00', u'1864729.00', u'1826.00', u'-26.00']
[u'89', u'Laxmi Bank Limited', u'36', u'572.00', u'555.00', u'566.00', u'8151.00', u'4587286.00', u'569.00', u'-3.00']
[u'90', u'Kumari Bank Limited', u'21', u'399.00', u'390.00', u'392.00', u'6652.00', u'2609547.00', u'398.00', u'-6.00']
[u'91', u'Kasthamandap Development Bank Limited', u'4', u'183.00', u'180.00', u'183.00', u'287.00', u'51780.00', u'180.00', u'3.00']
[u'92', u'Kalinchowk Development Bank Ltd.', u'22', u'174.00', u'166.00', u'166.00', u'1123.00', u'189964.00', u'174.00', u'-8.00']
[u'93', u'Kalika Microcredit Development Bank Ltd.', u'19', u'1645.00', u'1582.00', u'1600.00', u'2594.00', u'4149688.00', u'1614.00', u'-14.00']
[u'94', u'Kabeli Bikas Bank Limited', u'5', u'469.00', u'453.00', u'460.00', u'124.00', u'56536.00', u'453.00', u'7.00']
[u'95', u'Jebils Finance Ltd.', u'1', u'156.00', u'156.00', u'156.00', u'100.00', u'15600.00', u'153.00', u'3.00']
[u'96', u'Innovative Development Bank Ltd.', u'3', u'540.00', u'520.00', u'540.00', u'30.00', u'15900.00', u'510.00', u'30.00']
[u'97', u'ILFCO Microfinance Bittiya Sanstha Ltd.', u'200', u'1035.00', u'980.00', u'1000.00', u'3140.00', u'3169471.00', u'1030.00', u'-30.00']
[u'98', u'ICFC Finance Limited', u'1', u'204.00', u'204.00', u'204.00', u'500.00', u'102000.00', u'204.00', u'0.00']
[u'99', u'Himalayan General Insurance Co. Ltd', u'154', u'671.00', u'600.00', u'671.00', u'57596.00', u'36967536.00', u'610.00', u'61.00']
[u'100', u'Himalayan Bank Limited', u'13', u'932.00', u'915.00', u'926.00', u'1030.00', u'954487.00', u'932.00', u'-6.00']
[u'101', u'Gurans Life Insurance Company Ltd.', u'46', u'728.00', u'661.00', u'686.00', u'12487.00', u'8592354.00', u'700.00', u'-14.00']
[u'102', u'Global IME Bank Limited', u'49', u'396.00', u'392.00', u'394.00', u'12643.00', u'4985295.00', u'395.00', u'-1.00']
[u'103', u'Garima Bikas Bank Limited', u'5', u'299.00', u'296.00', u'299.00', u'404.00', u'120036.00', u'301.00', u'-2.00']
[u'104', u'Gandaki Bikas Bank Limited', u'3', u'336.00', u'325.00', u'336.00', u'295.00', u'98375.00', u'321.00', u'15.00']
[u'105', u'First Micro Finance Development Bank Ltd.', u'15', u'722.00', u'709.00', u'709.00', u'3001.00', u'2149232.00', u'730.00', u'-21.00']
[u'106', u'Excel Development Bank Ltd.', u'19', u'754.00', u'731.00', u'741.00', u'2834.00', u'2104352.00', u'734.00', u'7.00']
[u'107', u'Everest Insurance Co. Ltd.', u'31', u'1026.00', u'930.00', u'951.00', u'4349.00', u'4225220.00', u'999.00', u'-48.00']
[u'108', u'Everest Bank Limited Con. Pref.', u'6', u'1340.00', u'1320.00', u'1320.00', u'1372.00', u'1815640.00', u'1349.00', u'-29.00']
[u'109', u'Everest Bank Limited', u'27', u'2055.00', u'2036.00', u'2050.00', u'4501.00', u'9209523.00', u'2041.00', u'9.00']
[u'110', u'Dev Bikas Bank Limited', u'8', u'181.00', u'175.00', u'175.00', u'3328.00', u'590568.00', u'184.00', u'-9.00']
[u'111', u'Deprosc Development Bank Limited', u'21', u'1820.00', u'1725.00', u'1735.00', u'6895.00', u'12041655.00', u'1759.00', u'-24.00']
[u'112', u'Country Development Bank Ltd.', u'3', u'180.00', u'180.00', u'180.00', u'180.00', u'32400.00', u'180.00', u'0.00']
[u'113', u'Civil Bank Ltd', u'51', u'255.00', u'247.00', u'250.00', u'14794.00', u'3707676.00', u'252.00', u'-2.00']
[u'114', u'Citizen Investment Trust', u'21', u'4150.00', u'4100.00', u'4135.00', u'1517.00', u'6252870.00', u'4105.00', u'30.00']
[u'115', u'Citizen Bank International Limited', u'29', u'567.00', u'553.00', u'563.00', u'5521.00', u'3109845.00', u'568.00', u'-5.00']
[u'116', u'Chilime Hydropower Company Limited', u'40', u'1175.00', u'1150.00', u'1150.00', u'4385.00', u'5083376.00', u'1166.00', u'-16.00']
[u'117', u'Chhimek Laghubitta Bikas Bank Limited', u'27', u'1775.00', u'1680.00', u'1680.00', u'2320.00', u'4030330.00', u'1755.00', u'-75.00']
[u'118', u'Century Commercial Bank Ltd.', u'27', u'316.00', u'308.00', u'314.00', u'7663.00', u'2395955.00', u'314.00', u'0.00']
[u'119', u'Butwal Power Company Limited', u'4', u'540.00', u'540.00', u'540.00', u'700.00', u'378000.00', u'540.00', u'0.00']
[u'120', u'Biratlaxmi Bikas Bank Limited', u'5', u'315.00', u'303.00', u'315.00', u'332.00', u'102712.00', u'309.00', u'6.00']
[u'121', u'Bhaktapur Finance Co. Ltd.', u'12', u'140.00', u'133.00', u'133.00', u'1321.00', u'177546.00', u'140.00', u'-7.00']
[u'122', u'Barun Hydropower Co. Ltd.', u'102', u'280.00', u'266.00', u'276.00', u'1050.00', u'286600.00', u'267.00', u'9.00']
[u'123', u'Asian Life Insurance Co. Limited', u'45', u'1300.00', u'1240.00', u'1275.00', u'9473.00', u'12147812.00', u'1304.00', u'-29.00']
[u'124', u'Arun Valley Hydropower Development Co. Ltd.', u'23', u'261.00', u'254.00', u'257.00', u'5072.00', u'1296773.00', u'256.00', u'1.00']
[u'125', u'Arun Finance Limited', u'10', u'110.00', u'104.00', u'104.00', u'1550.00', u'162080.00', u'112.00', u'-8.00']
[u'126', u'Araniko Development Bank Limited', u'5', u'208.00', u'202.00', u'207.00', u'1079.00', u'222403.00', u'199.00', u'8.00']
[u'127', u'Api Power Company Ltd.', u'449', u'373.00', u'358.00', u'368.00', u'9183.00', u'3351712.00', u'369.00', u'-1.00']
[u'128', u'Agriculture Development Bank Limited', u'37', u'528.00', u'502.00', u'506.00', u'6760.00', u'3441749.00', u'518.00', u'-12.00']
[u'129', u'Ace Development Bank Ltd.', u'4', u'290.00', u'288.00', u'290.00', u'1368.00', u'395744.00', u'290.00', u'0.00']
[u'Page 1/1\xa01']
[u'Total Amount Rs.', u'494,473,367']
[u'Total Quantity', u'704,022']
[u'Total No of Transactions', u'3,766']
为了避免不属于 cols 的最后一个数据，抓住第一个 td 不是数字的地方：
for row in cols_tr.find_all_next("tr"):
if row.find("td").text.isdigit():
print([td.text.strip() for td in row.find_all("td")])
这将只剩下 table 数据，删除：
[u'Page 1/1\xa01']
[u'Total Amount Rs.', u'494,473,367']
[u'Total Quantity', u'704,022']
[u'Total No of Transactions', u'3,766']
您还可以检查返回的 tds 的长度，看它们是否与列的长度匹配。您不想做的是对切片进行硬编码，就好像在 header 之前或您将丢失的最后一条数据之后添加了一个额外的行。
另外如果你只想要第n个td，你不需要find_all，你可以使用nth-of-type:
for row in cols_tr.find_all_next("tr"):
if row.find("td").text.isdigit():
print(row.select_one("td:nth-of-type(4)").text)
那只会给你第四列数据：
143.00
315.00
1235.00
550.00
147.00
25500.00
233.00
300.00
221.00
100.00
2040.00
2025.00
826.00
415.00
2404.00
319.00
2590.00
325.00
15.56
1075.00
9.55
605.00
196.00
1424.00
380.00
260.00
768.00
660.00
1456.00
375.00
980.00
1122.00
185.00
690.00
362.00
170.00
327.00
300.00
185.00
318.00
720.00
126.00
165.00
1595.00
499.00
965.00
629.00
292.00
333.00
417.00
9.90
424.00
891.00
1690.00
276.00
1034.00
9.95
2038.00
1510.00
3520.00
591.00
700.00
618.00
313.00
660.00
306.00
436.00
890.00
1475.00
2630.00
115.00
295.00
3570.00
1341.00
1850.00
......................................
将所有数据写入 csv 只需使用 csv.writer: 并写入数据列表即可:
from bs4 import BeautifulSoup
soup = BeautifulSoup(r.content)
with open("data.csv", "w") as f:
wr = writer(f)
table = soup.select_one("table.table-condensed.table-hover")
cols_tr = table.select_one("tr.unique")
# write columns names
wr.writerow([td.text.strip() for td in cols_tr.find_all("td")])
# write all row data.
wr.writerows([td.text.strip() for td in row.find_all("td")]
for row in cols_tr.find_all_next("tr")
if row.find("td").text.isdigit())
所以 data.csv 看起来像：
S.N.,Traded Companies,No. Of Transaction,Max Price,Min Price,Closing Price,Traded Shares,Amount,Previous Closing,Difference Rs.
1,Yeti Development Bank Limited,7,143.00,140.00,140.00,1777.00,252897.00,143.00,-3.00
2,Western Development Bank Limited,1,315.00,315.00,315.00,500.00,157500.00,319.00,-4.00
3,Vijaya laghubitta Bittiya Sanstha Ltd.,162,1235.00,1172.00,1195.00,3188.00,3853176.00,1225.00,-30.00
4,United Insurance Co. (Nepal) Ltd.,111,550.00,500.00,540.00,50433.00,26399127.00,510.00,30.00
5,Unique Finance Ltd.,6,147.00,145.00,147.00,280.00,41116.00,143.00,4.00
6,Uniliver Nepal Limited,1,25500.00,25500.00,25500.00,80.00,2040000.00,25186.00,314.00
7,Tourism Development Bank Limited,2,233.00,229.00,229.00,51.00,11719.00,229.00,0.00
8,Tinau Development Bank Limited,1,300.00,300.00,300.00,154.00,46200.00,300.00,0.00
9,Taragaon Regency Hotel Limited,4,221.00,213.00,216.00,1550.00,334550.00,217.00,-1.00
10,Synergy Finance Ltd.,6,100.00,97.00,100.00,7991.00,793118.00,98.00,2.00
11,Swarojgar Laghu Bitta Bikas Bank Ltd.,9,2040.00,1921.00,2025.00,932.00,1859391.00,2000.00,25.00
12,Swabalamban Bikas Bank Limited,36,2025.00,1940.00,1940.00,3024.00,5970152.00,1949.00,-9.00
13,Surya Life Insurance Company Limited,27,826.00,773.00,790.00,5354.00,4322799.00,804.00,-14.00
14,Sunrise Bank Limited,7,415.00,408.00,415.00,2162.00,891160.00,412.00,3.00
......................................
要遍历日期范围，请使用逻辑 here
import requests
from bs4 import BeautifulSoup
f = open('path to create /Price.csv','w')
errorFile = open('path to create /errorPrice.txt','w')
year = 2012; month = 1; day =1
if year<= 2016:
if day > 32:
month += 1
day = 1
if month >12:
year += 1
month = 1
url = 'http://nepalstock.com.np/main/todays_price/index/1/stock-name/desc/YTozOntzOjk6InN0YXJ0RGF0ZSI7czoxMDoiMjAxNi0wNi0wOSI7czoxMjoic3RvY2stc3ltYm9sIjtzOjA6IiI7czo2OiJfbGltaXQiO3M6MjoiNTAiO30?startDate='+str(year)+'-'+str(month)+'-'+str(day)+'&stock-symbol=&_limit=500'
res = requests.get(url)
soup = BeautifulSoup(res.text, 'lxml')
for child in soup.findAll('table'):
for row in child.findAll('tr')[2:]:
for col in row.findAll('td'):
try:
SN = col[3].string.strip()
f.write(SN+'\n')
except Exception as e:
errorFile.write (str(day) + '*************'+ str(e)+'***********************'+ str(col)+'\n')
pass
#day += 1
f.close
errorFile.close
“我想提取 col[3]，但它不起作用，而且我无法在错误文件中显示任何内容，尽管我是一个完全的菜鸟，可能在那一点上弄错了。”
在您实际出错之前，关于您的代码的一些事情：
使用with语句打开文件。无需手动打开和关闭文件。
如果您不打算打印网页，请使用 res.content 而不是 res.text。如果您将页面源传递给另一个函数，如 soup.parse，请始终使用 res.content.
关于您的问题：
row.findAll('td') 是所有 table 数据的列表，从中你需要 3d 索引，所以你不需要迭代它。
就这样使用：
for child in soup.findAll('table'):
for row in child.findAll('tr')[2:-4]:
cols = row.findAll('td')
SN = cols[3].string.strip()
print(SN)
此外，正如您在 -4 中看到的，最后 4 行也不包含任何数据。
你只需要索引返回的列表 SN = row.findAll('td')[3]，也没有必要删除换行符然后再放回去，这将获得所有 table 数据：
r = requests.get("http://nepalstock.com.np/main/todays_price/index/1/stock-name/desc/YTozOntzOjk6InN0YXJ0RGF0ZSI7czoxMDoiMjAxNi0wNi0wOSI7czoxMjoic3RvY2stc3ltYm9sIjtzOjA6IiI7czo2OiJfbGltaXQiO3M6MjoiNTAiO30?startDate=2016-01-04&stock-symbol=&_limit=500")
soup = BeautifulSoup(r.content)
table = soup.select_one("table.table-condensed.table-hover")
cols_tr = table.select_one("tr.unique")
print([td.text.strip() for td in cols_tr.find_all("td")])
for row in cols_tr.find_all_next("tr"):
print([td.text.strip() for td in row.find_all("td")])
将输出：
[u'S.N.', u'Traded Companies', u'No. Of Transaction', u'Max Price', u'Min Price', u'Closing Price', u'Traded Shares', u'Amount', u'Previous Closing', u'Difference Rs.']
[u'1', u'Yeti Development Bank Limited', u'7', u'143.00', u'140.00', u'140.00', u'1777.00', u'252897.00', u'143.00', u'-3.00']
[u'2', u'Western Development Bank Limited', u'1', u'315.00', u'315.00', u'315.00', u'500.00', u'157500.00', u'319.00', u'-4.00']
[u'3', u'Vijaya laghubitta Bittiya Sanstha Ltd.', u'162', u'1235.00', u'1172.00', u'1195.00', u'3188.00', u'3853176.00', u'1225.00', u'-30.00']
[u'4', u'United Insurance Co. (Nepal) Ltd.', u'111', u'550.00', u'500.00', u'540.00', u'50433.00', u'26399127.00', u'510.00', u'30.00']
[u'5', u'Unique Finance Ltd.', u'6', u'147.00', u'145.00', u'147.00', u'280.00', u'41116.00', u'143.00', u'4.00']
[u'6', u'Uniliver Nepal Limited', u'1', u'25500.00', u'25500.00', u'25500.00', u'80.00', u'2040000.00', u'25186.00', u'314.00']
[u'7', u'Tourism Development Bank Limited', u'2', u'233.00', u'229.00', u'229.00', u'51.00', u'11719.00', u'229.00', u'0.00']
[u'8', u'Tinau Development Bank Limited', u'1', u'300.00', u'300.00', u'300.00', u'154.00', u'46200.00', u'300.00', u'0.00']
[u'9', u'Taragaon Regency Hotel Limited', u'4', u'221.00', u'213.00', u'216.00', u'1550.00', u'334550.00', u'217.00', u'-1.00']
[u'10', u'Synergy Finance Ltd.', u'6', u'100.00', u'97.00', u'100.00', u'7991.00', u'793118.00', u'98.00', u'2.00']
[u'11', u'Swarojgar Laghu Bitta Bikas Bank Ltd.', u'9', u'2040.00', u'1921.00', u'2025.00', u'932.00', u'1859391.00', u'2000.00', u'25.00']
[u'12', u'Swabalamban Bikas Bank Limited', u'36', u'2025.00', u'1940.00', u'1940.00', u'3024.00', u'5970152.00', u'1949.00', u'-9.00']
[u'13', u'Surya Life Insurance Company Limited', u'27', u'826.00', u'773.00', u'790.00', u'5354.00', u'4322799.00', u'804.00', u'-14.00']
[u'14', u'Sunrise Bank Limited', u'7', u'415.00', u'408.00', u'415.00', u'2162.00', u'891160.00', u'412.00', u'3.00']
[u'15', u'Summit Micro Finance Development Bank Ltd.', u'4', u'2404.00', u'2311.00', u'2356.00', u'128.00', u'301158.00', u'2266.00', u'90.00']
[u'16', u'Subhechha Bikas Bank Limited', u'13', u'319.00', u'312.00', u'319.00', u'1130.00', u'356240.00', u'310.00', u'9.00']
[u'17', u'Standard Chartered Bank Limited', u'12', u'2590.00', u'2550.00', u'2555.00', u'805.00', u'2069500.00', u'2630.00', u'-75.00']
[u'18', u'Soaltee Hotel Limited', u'24', u'325.00', u'310.00', u'310.00', u'12580.00', u'3947660.00', u'320.00', u'-10.00']
[u'19', u'Siddhartha Investment Growth Scheme-1', u'1', u'15.56', u'15.56', u'15.56', u'1500.00', u'23340.00', u'15.61', u'-0.05']
[u'20', u'Siddhartha Insurance Ltd.', u'57', u'1075.00', u'1011.00', u'1075.00', u'10540.00', u'11093865.00', u'1052.00', u'23.00']
[u'21', u'Siddhartha Equity Orineted Scheme', u'4', u'9.55', u'9.50', u'9.55', u'7600.00', u'72527.00', u'9.65', u'-0.10']
[u'22', u'Siddhartha Bank Limited', u'20', u'605.00', u'591.00', u'597.00', u'4844.00', u'2904232.00', u'610.00', u'-13.00']
[u'23', u'Siddharth Finance Ltd.', u'8', u'196.00', u'180.00', u'193.00', u'677.00', u'128312.00', u'179.00', u'14.00']
[u'24', u'Shikhar Insurance Co. Ltd.', u'42', u'1424.00', u'1345.00', u'1379.00', u'6993.00', u'9595832.00', u'1377.00', u'2.00']
[u'25', u'Shangrila Development Bank Ltd.', u'3', u'380.00', u'375.00', u'378.00', u'657.00', u'248160.00', u'380.00', u'-2.00']
[u'26', u'Sewa Bikas Bank Limited', u'2', u'260.00', u'260.00', u'260.00', u'304.00', u'79040.00', u'255.00', u'5.00']
[u'27', u'Sanima Mai Hydropower Ltd.', u'33', u'768.00', u'750.00', u'760.00', u'2373.00', u'1808638.00', u'765.00', u'-5.00']
[u'28', u'Sanima Bank Limited', u'33', u'660.00', u'653.00', u'653.00', u'11727.00', u'7700213.00', u'661.00', u'-8.00']
[u'29', u'Sana Kisan Bikas Bank Ltd', u'37', u'1456.00', u'1400.00', u'1434.00', u'2863.00', u'4077092.00', u'1400.00', u'34.00']
[u'30', u'Sahayogi Bikas Bank Limited', u'1', u'375.00', u'375.00', u'375.00', u'10.00', u'3750.00', u'368.00', u'7.00']
[u'31', u'Sahara Bikas Bank Ltd.', u'2', u'980.00', u'980.00', u'980.00', u'20.00', u'19600.00', u'1000.00', u'-20.00']
[u'32', u'Sagarmatha Insurance Co. Ltd.', u'18', u'1122.00', u'1075.00', u'1075.00', u'2179.00', u'2389443.00', u'1095.00', u'-20.00']
[u'33', u'Sagarmatha Finance Limited', u'20', u'185.00', u'170.00', u'185.00', u'3484.00', u'629111.00', u'169.00', u'16.00']
[u'34', u'Rural Microfinance Development Centre Ltd.', u'15', u'690.00', u'680.00', u'686.00', u'1490.00', u'1016830.00', u'689.00', u'-3.00']
[u'35', u'Ridi Hydropower Development Company Ltd.', u'34', u'362.00', u'343.00', u'355.00', u'648.00', u'228537.00', u'346.00', u'9.00']
[u'36', u'Reliance Lotus Finance Ltd.', u'1', u'170.00', u'170.00', u'170.00', u'1000.00', u'170000.00', u'170.00', u'0.00']
[u'37', u'Reliable Microfinance Bittiya Sanstha Ltd.', u'1', u'327.00', u'327.00', u'327.00', u'10.00', u'3270.00', u'321.00', u'6.00']
[u'38', u'Reliable Development Bank Limited', u'11', u'300.00', u'295.00', u'295.00', u'482.00', u'143941.00', u'300.00', u'-5.00']
[u'39', u'Raptibheri Bikas Bank Ltd.', u'68', u'185.00', u'177.00', u'182.00', u'1406.00', u'252988.00', u'180.00', u'2.00']
[u'40', u'Purnima Bikas Bank Ltd.', u'4', u'318.00', u'300.00', u'318.00', u'404.00', u'124866.00', u'298.00', u'20.00']
[u'41', u'Prudential Insurance Co. Ltd.', u'113', u'720.00', u'630.00', u'698.00', u'31521.00', u'21716588.00', u'655.00', u'43.00']
[u'42', u'ProgressiveFinance Limited', u'2', u'126.00', u'126.00', u'126.00', u'240.00', u'30240.00', u'128.00', u'-2.00']
[u'43', u'Professional Diyalo Bikas Bank Ltd.', u'1', u'165.00', u'165.00', u'165.00', u'11.00', u'1815.00', u'164.00', u'1.00']
[u'44', u'Prime Life Insurance Company Limited', u'89', u'1595.00', u'1550.00', u'1565.00', u'12795.00', u'20032091.00', u'1555.00', u'10.00']
[u'45', u'Prime Commercial Bank Ltd.', u'19', u'499.00', u'485.00', u'490.00', u'4224.00', u'2064184.00', u'490.00', u'0.00']
[u'46', u'Premier Insurance Co. Ltd.', u'120', u'965.00', u'895.00', u'960.00', u'26299.00', u'24644627.00', u'878.00', u'82.00']
[u'47', u'Prabhu Insurance Ltd.', u'60', u'629.00', u'590.00', u'605.00', u'17659.00', u'10658300.00', u'617.00', u'-12.00']
[u'48', u'Pokhara Finance Ltd.', u'6', u'292.00', u'285.00', u'290.00', u'1616.00', u'463864.00', u'289.00', u'1.00']
[u'49', u'Pacific Development Bank Limited', u'1', u'333.00', u'333.00', u'333.00', u'53.00', u'17649.00', u'339.00', u'-6.00']
[u'50', u'Oriental Hotels Limited', u'1', u'417.00', u'417.00', u'417.00', u'22.00', u'9174.00', u'416.00', u'1.00']
[u'51', u'NMB Sulav Investment Fund-1', u'2', u'9.90', u'9.71', u'9.90', u'3500.00', u'34365.00', u'9.90', u'0.00']
[u'52', u'NMB Bank Limited', u'12', u'424.00', u'416.00', u'421.00', u'2559.00', u'1078416.00', u'416.00', u'5.00']
[u'53', u'NLG Insurance Company Ltd.', u'38', u'891.00', u'806.00', u'842.00', u'7364.00', u'6196657.00', u'825.00', u'17.00']
[u'54', u'Nirdhan Utthan Bank Limited', u'8', u'1690.00', u'1670.00', u'1688.00', u'996.00', u'1672610.00', u'1655.00', u'33.00']
[u'55', u'NIDC Capital Markets Ltd.', u'1', u'276.00', u'276.00', u'276.00', u'500.00', u'138000.00', u'281.00', u'-5.00']
[u'56', u'NIC Asia Bank Ltd.', u'168', u'1034.00', u'1010.00', u'1012.00', u'41061.00', u'41629557.00', u'1014.00', u'-2.00']
[u'57', u'NIBL Samriddhi Fund 1', u'7', u'9.95', u'9.90', u'9.95', u'20478.00', u'203256.10', u'9.80', u'0.15']
[u'58', u'Nerude Laghubita Bikas Bank Limited', u'18', u'2038.00', u'1977.00', u'1985.00', u'1880.00', u'3750102.00', u'1960.00', u'25.00']
[u'59', u'Nepal SBI Bank Limited', u'35', u'1510.00', u'1500.00', u'1500.00', u'7476.00', u'11234652.00', u'1503.00', u'-3.00']
[u'60', u'Nepal Life Insurance Co. Ltd.', u'14', u'3520.00', u'3410.00', u'3461.00', u'1661.00', u'5730070.00', u'3475.00', u'-14.00']
[u'61', u'Nepal Investment Bank Ltd. Promoter Share', u'6', u'591.00', u'585.00', u'591.00', u'3460.00', u'2039850.00', u'600.00', u'-9.00']
[u'62', u'Nepal Investment Bank Limited', u'37', u'700.00', u'692.00', u'700.00', u'9062.00', u'6311182.00', u'695.00', u'5.00']
[u'63', u'Nepal Insurance Co. Ltd.', u'23', u'618.00', u'579.00', u'615.00', u'7147.00', u'4295495.00', u'617.00', u'-2.00']
[u'64', u'Nepal Grameen Bikas Bank Ltd.', u'25', u'313.00', u'299.00', u'300.00', u'9497.00', u'2881799.00', u'314.00', u'-14.00']
[u'65', u'Nepal Doorsanchar Comapany Limited', u'2', u'660.00', u'659.00', u'660.00', u'1320.00', u'871000.00', u'660.00', u'0.00']
[u'66', u'Nepal Bank Limited', u'29', u'306.00', u'300.00', u'301.00', u'23894.00', u'7224247.00', u'310.00', u'-9.00']
[u'67', u'Nepal Bangladesh Bank Limited', u'49', u'436.00', u'430.00', u'436.00', u'17799.00', u'7713258.00', u'432.00', u'4.00']
[u'68', u'Neco Insurance Co. Ltd.', u'50', u'890.00', u'832.00', u'864.00', u'8940.00', u'7675605.00', u'868.00', u'-4.00']
[u'69', u'Naya Nepal Laghubitta Bikas Bank Ltd.', u'6', u'1475.00', u'1400.00', u'1410.00', u'1173.00', u'1663779.00', u'1497.00', u'-87.00']
[u'70', u'National Life Insurance Co. Ltd.', u'66', u'2630.00', u'2500.00', u'2526.00', u'9181.00', u'23332004.00', u'2550.00', u'-24.00']
[u'71', u'National Hydro Power Company Limited', u'31', u'115.00', u'110.00', u'112.00', u'34550.00', u'3886400.00', u'110.00', u'2.00']
[u'72', u'Narayani National Finance Limited', u'2', u'295.00', u'294.00', u'295.00', u'652.00', u'192140.00', u'295.00', u'0.00']
[u'73', u'NagBeli LaghuBitta Bikas Bank Ltd.', u'7', u'3570.00', u'3500.00', u'3500.00', u'303.00', u'1071390.00', u'3550.00', u'-50.00']
[u'74', u'NABIL Bank Limited Promotor Share', u'8', u'1341.00', u'1332.00', u'1332.00', u'1897.00', u'2534803.00', u'1340.00', u'-8.00']
[u'75', u'Nabil Bank Limited', u'28', u'1850.00', u'1800.00', u'1800.00', u'2496.00', u'4504646.00', u'1840.00', u'-40.00']
[u'76', u'Nabil Balance Fund 1', u'2', u'14.50', u'14.40', u'14.40', u'4797.00', u'69256.50', u'14.70', u'-0.30']
[u'77', u'Multipurpose Finance Company Limited', u'3', u'150.00', u'150.00', u'150.00', u'33.00', u'4950.00', u'150.00', u'0.00']
[u'78', u'Muktinath Bikas Bank Ltd.', u'19', u'720.00', u'690.00', u'701.00', u'4694.00', u'3281696.00', u'720.00', u'-19.00']
[u'79', u'Mount Makalu Development Bank Ltd.', u'1', u'506.00', u'506.00', u'506.00', u'20.00', u'10120.00', u'497.00', u'9.00']
[u'80', u'Mithila LaghuBitta Bikas Bank Ltd.', u'1', u'1322.00', u'1322.00', u'1322.00', u'24.00', u'31728.00', u'1297.00', u'25.00']
[u'81', u'Miteri Development Bank Limited', u'11', u'555.00', u'535.00', u'550.00', u'3168.00', u'1726818.00', u'535.00', u'15.00']
[u'82', u'Mirmire Microfinance Development Bank Ltd.', u'84', u'2310.00', u'2150.00', u'2225.00', u'840.00', u'1877350.00', u'2280.00', u'-55.00']
[u'83', u'Malika Bikas Bank Limited', u'3', u'247.00', u'245.00', u'245.00', u'850.00', u'208350.00', u'250.00', u'-5.00']
[u'84', u'Mahila Sahayatra Microfinance Bittiya Sanstha Ltd.', u'4', u'552.00', u'522.00', u'552.00', u'40.00', u'21480.00', u'512.00', u'40.00']
[u'85', u'Lumbini General Insurance Co. Ltd.', u'55', u'670.00', u'575.00', u'610.00', u'7968.00', u'4860101.00', u'610.00', u'0.00']
[u'86', u'Life Insurance Co. Nepal', u'25', u'3877.00', u'3780.00', u'3798.00', u'2958.00', u'11241460.00', u'3872.00', u'-74.00']
[u'87', u'Laxmi Value Fund-1', u'1', u'9.95', u'9.95', u'9.95', u'3300.00', u'32835.00', u'9.94', u'0.01']
[u'88', u'Laxmi Laghubitta Bittiya Sanstha Ltd.', u'22', u'1899.00', u'1757.00', u'1800.00', u'1010.00', u'1864729.00', u'1826.00', u'-26.00']
[u'89', u'Laxmi Bank Limited', u'36', u'572.00', u'555.00', u'566.00', u'8151.00', u'4587286.00', u'569.00', u'-3.00']
[u'90', u'Kumari Bank Limited', u'21', u'399.00', u'390.00', u'392.00', u'6652.00', u'2609547.00', u'398.00', u'-6.00']
[u'91', u'Kasthamandap Development Bank Limited', u'4', u'183.00', u'180.00', u'183.00', u'287.00', u'51780.00', u'180.00', u'3.00']
[u'92', u'Kalinchowk Development Bank Ltd.', u'22', u'174.00', u'166.00', u'166.00', u'1123.00', u'189964.00', u'174.00', u'-8.00']
[u'93', u'Kalika Microcredit Development Bank Ltd.', u'19', u'1645.00', u'1582.00', u'1600.00', u'2594.00', u'4149688.00', u'1614.00', u'-14.00']
[u'94', u'Kabeli Bikas Bank Limited', u'5', u'469.00', u'453.00', u'460.00', u'124.00', u'56536.00', u'453.00', u'7.00']
[u'95', u'Jebils Finance Ltd.', u'1', u'156.00', u'156.00', u'156.00', u'100.00', u'15600.00', u'153.00', u'3.00']
[u'96', u'Innovative Development Bank Ltd.', u'3', u'540.00', u'520.00', u'540.00', u'30.00', u'15900.00', u'510.00', u'30.00']
[u'97', u'ILFCO Microfinance Bittiya Sanstha Ltd.', u'200', u'1035.00', u'980.00', u'1000.00', u'3140.00', u'3169471.00', u'1030.00', u'-30.00']
[u'98', u'ICFC Finance Limited', u'1', u'204.00', u'204.00', u'204.00', u'500.00', u'102000.00', u'204.00', u'0.00']
[u'99', u'Himalayan General Insurance Co. Ltd', u'154', u'671.00', u'600.00', u'671.00', u'57596.00', u'36967536.00', u'610.00', u'61.00']
[u'100', u'Himalayan Bank Limited', u'13', u'932.00', u'915.00', u'926.00', u'1030.00', u'954487.00', u'932.00', u'-6.00']
[u'101', u'Gurans Life Insurance Company Ltd.', u'46', u'728.00', u'661.00', u'686.00', u'12487.00', u'8592354.00', u'700.00', u'-14.00']
[u'102', u'Global IME Bank Limited', u'49', u'396.00', u'392.00', u'394.00', u'12643.00', u'4985295.00', u'395.00', u'-1.00']
[u'103', u'Garima Bikas Bank Limited', u'5', u'299.00', u'296.00', u'299.00', u'404.00', u'120036.00', u'301.00', u'-2.00']
[u'104', u'Gandaki Bikas Bank Limited', u'3', u'336.00', u'325.00', u'336.00', u'295.00', u'98375.00', u'321.00', u'15.00']
[u'105', u'First Micro Finance Development Bank Ltd.', u'15', u'722.00', u'709.00', u'709.00', u'3001.00', u'2149232.00', u'730.00', u'-21.00']
[u'106', u'Excel Development Bank Ltd.', u'19', u'754.00', u'731.00', u'741.00', u'2834.00', u'2104352.00', u'734.00', u'7.00']
[u'107', u'Everest Insurance Co. Ltd.', u'31', u'1026.00', u'930.00', u'951.00', u'4349.00', u'4225220.00', u'999.00', u'-48.00']
[u'108', u'Everest Bank Limited Con. Pref.', u'6', u'1340.00', u'1320.00', u'1320.00', u'1372.00', u'1815640.00', u'1349.00', u'-29.00']
[u'109', u'Everest Bank Limited', u'27', u'2055.00', u'2036.00', u'2050.00', u'4501.00', u'9209523.00', u'2041.00', u'9.00']
[u'110', u'Dev Bikas Bank Limited', u'8', u'181.00', u'175.00', u'175.00', u'3328.00', u'590568.00', u'184.00', u'-9.00']
[u'111', u'Deprosc Development Bank Limited', u'21', u'1820.00', u'1725.00', u'1735.00', u'6895.00', u'12041655.00', u'1759.00', u'-24.00']
[u'112', u'Country Development Bank Ltd.', u'3', u'180.00', u'180.00', u'180.00', u'180.00', u'32400.00', u'180.00', u'0.00']
[u'113', u'Civil Bank Ltd', u'51', u'255.00', u'247.00', u'250.00', u'14794.00', u'3707676.00', u'252.00', u'-2.00']
[u'114', u'Citizen Investment Trust', u'21', u'4150.00', u'4100.00', u'4135.00', u'1517.00', u'6252870.00', u'4105.00', u'30.00']
[u'115', u'Citizen Bank International Limited', u'29', u'567.00', u'553.00', u'563.00', u'5521.00', u'3109845.00', u'568.00', u'-5.00']
[u'116', u'Chilime Hydropower Company Limited', u'40', u'1175.00', u'1150.00', u'1150.00', u'4385.00', u'5083376.00', u'1166.00', u'-16.00']
[u'117', u'Chhimek Laghubitta Bikas Bank Limited', u'27', u'1775.00', u'1680.00', u'1680.00', u'2320.00', u'4030330.00', u'1755.00', u'-75.00']
[u'118', u'Century Commercial Bank Ltd.', u'27', u'316.00', u'308.00', u'314.00', u'7663.00', u'2395955.00', u'314.00', u'0.00']
[u'119', u'Butwal Power Company Limited', u'4', u'540.00', u'540.00', u'540.00', u'700.00', u'378000.00', u'540.00', u'0.00']
[u'120', u'Biratlaxmi Bikas Bank Limited', u'5', u'315.00', u'303.00', u'315.00', u'332.00', u'102712.00', u'309.00', u'6.00']
[u'121', u'Bhaktapur Finance Co. Ltd.', u'12', u'140.00', u'133.00', u'133.00', u'1321.00', u'177546.00', u'140.00', u'-7.00']
[u'122', u'Barun Hydropower Co. Ltd.', u'102', u'280.00', u'266.00', u'276.00', u'1050.00', u'286600.00', u'267.00', u'9.00']
[u'123', u'Asian Life Insurance Co. Limited', u'45', u'1300.00', u'1240.00', u'1275.00', u'9473.00', u'12147812.00', u'1304.00', u'-29.00']
[u'124', u'Arun Valley Hydropower Development Co. Ltd.', u'23', u'261.00', u'254.00', u'257.00', u'5072.00', u'1296773.00', u'256.00', u'1.00']
[u'125', u'Arun Finance Limited', u'10', u'110.00', u'104.00', u'104.00', u'1550.00', u'162080.00', u'112.00', u'-8.00']
[u'126', u'Araniko Development Bank Limited', u'5', u'208.00', u'202.00', u'207.00', u'1079.00', u'222403.00', u'199.00', u'8.00']
[u'127', u'Api Power Company Ltd.', u'449', u'373.00', u'358.00', u'368.00', u'9183.00', u'3351712.00', u'369.00', u'-1.00']
[u'128', u'Agriculture Development Bank Limited', u'37', u'528.00', u'502.00', u'506.00', u'6760.00', u'3441749.00', u'518.00', u'-12.00']
[u'129', u'Ace Development Bank Ltd.', u'4', u'290.00', u'288.00', u'290.00', u'1368.00', u'395744.00', u'290.00', u'0.00']
[u'Page 1/1\xa01']
[u'Total Amount Rs.', u'494,473,367']
[u'Total Quantity', u'704,022']
[u'Total No of Transactions', u'3,766']
为了避免不属于 cols 的最后一个数据，抓住第一个 td 不是数字的地方：
for row in cols_tr.find_all_next("tr"):
if row.find("td").text.isdigit():
print([td.text.strip() for td in row.find_all("td")])
这将只剩下 table 数据，删除：
[u'Page 1/1\xa01']
[u'Total Amount Rs.', u'494,473,367']
[u'Total Quantity', u'704,022']
[u'Total No of Transactions', u'3,766']
您还可以检查返回的 tds 的长度，看它们是否与列的长度匹配。您不想做的是对切片进行硬编码，就好像在 header 之前或您将丢失的最后一条数据之后添加了一个额外的行。
另外如果你只想要第n个td，你不需要find_all，你可以使用nth-of-type:
for row in cols_tr.find_all_next("tr"):
if row.find("td").text.isdigit():
print(row.select_one("td:nth-of-type(4)").text)
那只会给你第四列数据：
143.00
315.00
1235.00
550.00
147.00
25500.00
233.00
300.00
221.00
100.00
2040.00
2025.00
826.00
415.00
2404.00
319.00
2590.00
325.00
15.56
1075.00
9.55
605.00
196.00
1424.00
380.00
260.00
768.00
660.00
1456.00
375.00
980.00
1122.00
185.00
690.00
362.00
170.00
327.00
300.00
185.00
318.00
720.00
126.00
165.00
1595.00
499.00
965.00
629.00
292.00
333.00
417.00
9.90
424.00
891.00
1690.00
276.00
1034.00
9.95
2038.00
1510.00
3520.00
591.00
700.00
618.00
313.00
660.00
306.00
436.00
890.00
1475.00
2630.00
115.00
295.00
3570.00
1341.00
1850.00
......................................
将所有数据写入 csv 只需使用 csv.writer: 并写入数据列表即可:
from bs4 import BeautifulSoup
soup = BeautifulSoup(r.content)
with open("data.csv", "w") as f:
wr = writer(f)
table = soup.select_one("table.table-condensed.table-hover")
cols_tr = table.select_one("tr.unique")
# write columns names
wr.writerow([td.text.strip() for td in cols_tr.find_all("td")])
# write all row data.
wr.writerows([td.text.strip() for td in row.find_all("td")]
for row in cols_tr.find_all_next("tr")
if row.find("td").text.isdigit())
所以 data.csv 看起来像：
S.N.,Traded Companies,No. Of Transaction,Max Price,Min Price,Closing Price,Traded Shares,Amount,Previous Closing,Difference Rs.
1,Yeti Development Bank Limited,7,143.00,140.00,140.00,1777.00,252897.00,143.00,-3.00
2,Western Development Bank Limited,1,315.00,315.00,315.00,500.00,157500.00,319.00,-4.00
3,Vijaya laghubitta Bittiya Sanstha Ltd.,162,1235.00,1172.00,1195.00,3188.00,3853176.00,1225.00,-30.00
4,United Insurance Co. (Nepal) Ltd.,111,550.00,500.00,540.00,50433.00,26399127.00,510.00,30.00
5,Unique Finance Ltd.,6,147.00,145.00,147.00,280.00,41116.00,143.00,4.00
6,Uniliver Nepal Limited,1,25500.00,25500.00,25500.00,80.00,2040000.00,25186.00,314.00
7,Tourism Development Bank Limited,2,233.00,229.00,229.00,51.00,11719.00,229.00,0.00
8,Tinau Development Bank Limited,1,300.00,300.00,300.00,154.00,46200.00,300.00,0.00
9,Taragaon Regency Hotel Limited,4,221.00,213.00,216.00,1550.00,334550.00,217.00,-1.00
10,Synergy Finance Ltd.,6,100.00,97.00,100.00,7991.00,793118.00,98.00,2.00
11,Swarojgar Laghu Bitta Bikas Bank Ltd.,9,2040.00,1921.00,2025.00,932.00,1859391.00,2000.00,25.00
12,Swabalamban Bikas Bank Limited,36,2025.00,1940.00,1940.00,3024.00,5970152.00,1949.00,-9.00
13,Surya Life Insurance Company Limited,27,826.00,773.00,790.00,5354.00,4322799.00,804.00,-14.00
14,Sunrise Bank Limited,7,415.00,408.00,415.00,2162.00,891160.00,412.00,3.00
......................................
要遍历日期范围，请使用逻辑 here