For 循环到 CSV 导致 Python 中的行不均匀

Question

仍在学习Python，如果这是一个非常明显的错误，我们深表歉意。不过，我几个小时以来一直在努力解决这个问题，我想看看是否有人能帮忙。

我在一个冰球网站上搜索了他们的溜冰鞋名称和价格，并将其写入 CSV 文件。唯一的问题是，当我将其写入 CSV 时，名称列（列为 Gear）和价格列的行未对齐。它是：

齿轮名称1
行Space
价格
行Space
装备名称2

最好将齿轮和价格行彼此相邻对齐。如果有帮助的话，我还附上了 link 到 CSV 图片。

import requests
from bs4 import BeautifulSoup as Soup

webpage_response = requests.get('https://www.purehockey.com/c/ice-hockey-skates-senior?')

webpage = (webpage_response.content)
parser = Soup(webpage, 'html.parser')


filename = "gear.csv"
f = open(filename, "w")

headers = "Gear, Price"
f.write(headers)

for gear in parser.find_all("div", {"class": "details"}):
    
    gearname = gear.find_all("div", {"class": "name"}, "a")
    gearnametext = gearname[0].text
    
    gearprice = gear.find_all("div", {"class": "price"}, "a")
    gearpricetext = gearprice[0].text

    print (gearnametext)
    print (gearpricetext)

    f.write(gearnametext + "," + gearpricetext)

[不均匀的行是什么样的][1] [1]: https://i.stack.imgur.com/EG2f2.png

Answer 1

我注意到字符串中有 gearnametext returns 2\n。您应该尝试方法 str.replace() 来删除 \n ，它会让您跳转到下一行。尝试：

import requests
from bs4 import BeautifulSoup as Soup

webpage_response = requests.get('https://www.purehockey.com/c/ice-hockey-skates-senior?')

webpage = (webpage_response.content)
parser = Soup(webpage, 'html.parser')


filename = "gear.csv"
f = open(filename, "w")

headers = "Gear, Price"
f.write(headers)

for gear in parser.find_all("div", {"class": "details"}):
    
    gearname = gear.find_all("div", {"class": "name"}, "a")
    gearnametext = gearname[0].text.replace('\n','')

    gearprice = gear.find_all("div", {"class": "price"}, "a")
    gearpricetext = gearprice[0].text

    print (gearnametext)
    print (gearpricetext)

    f.write(gearnametext + "," + gearpricetext)

我在循环内更改了齿轮名称的第二行：gearnametext = gearname[0].text.replace('\n','')。

Answer 2

建议 python 3 使用 with open(filename, 'w') as f: 和 strip() 您的文本，然后 write() 到您的文件。

除非您不使用 'a' 模式来追加每一行，否则您必须为您正在编写的每一行添加换行符。

例子

import requests
from bs4 import BeautifulSoup as Soup

webpage_response = requests.get('https://www.purehockey.com/c/ice-hockey-skates-senior?')

webpage = (webpage_response.content)
parser = Soup(webpage, 'html.parser')


filename = "gear1.csv"
headers = "Gear,Price\n"


with open(filename, 'w') as f:
    f.write(headers)

    for gear in parser.find_all("div", {"class": "details"}):
        gearnametext = gear.find("div", {"class": "name"}).text.strip()
        gearpricetext = gear.find("div", {"class": "price"}).text.strip()
        f.write(gearnametext + "," + gearpricetext+"\n")

输出

Gear,Price
Bauer Vapor X3.7 Ice Hockey Skates - Senior,9.99
Bauer X-LP Ice Hockey Skates - Senior,9.99
Bauer Vapor Hyperlite Ice Hockey Skates - Senior,9.98 - 49.98
CCM Jetspeed FT475 Ice Hockey Skates - Senior,9.99
Bauer X-LP Ice Hockey Skates - Intermediate,9.99

...

For 循环到 CSV 导致 Python 中的行不均匀

For Loop to CSV Leading to Uneven Rows in Python

csv

beautifulsoup

web-scraping

python-3.x

例子

输出