Problem importing csv files to pandas to avoid "IndexError: list index out of range"

Question

我正在努力学习 python / pandas。我正在研究“Python 的分析基础”，但遇到了瓶颈

使用

input_file = sys.argv[1]

给出结果

File "C:\Users\longr\Desktop\pfileexcel_introspect_workbook.py", line 11, in input_file = sys.argv[1] IndexError: list index out of range

在以前的练习中用

替换此调用

input_file = 'supplier_data.csv'

有效... [对于 csv 文件] 我使用了 github 的源代码 - 同样的错误。我所有的文件 [.py / .xlsx / .csv] 都在 C:\Users\longr\Desktop\pfile\ .... 但我不知所措

有人可以帮忙吗？


import sys
from xlrd import open_workbook

input_file = sys.argv[1]

workbook = open_workbook(input_file)
print('Number of worksheets:', workbook.nsheets)
for worksheet in workbook.sheets():
    print("Worksheet name:", worksheet.name, "\tRows:", worksheet.nrows, "t\Columns:", worksheet.ncols)

Answer 1

sys.argv[1] 是您在 python 文件名后输入到运行脚本的第三个输入。假设你的 py 脚本被命名为 example.py 那么你将运行它就像

python example.py

但是如果你想获取 csv 文件 argv[1] 那么你需要运行你的脚本

python example.py supplier_data.csv

现在你的 argv[0] == example.py 和 argv[1] == supplier_data.csv 为字符串类型。

Answer 2

经过进一步搜索，我找到了这个网站 https://www.youtube.com/watch?v=kWaerL6-OiU 这解决了我在阅读多个 excel 张

时遇到的问题

#import numpy as np
import pandas as pd
import glob

#### Combine, concatenate, join multiple excel files in a given folder into one dataframe, Each excel files having multiple sheets 
#### All sheets in a single Excel file are first combined into a dataframe, then all the Excel Books in the folder
#### Are combined to make a single data frame. The combined data frame is the exported into a single Excel sheet.


#path = r'C:\Users\Tchamna\Downloads\UTRC_DATA5GowanusSpeedData20152016'
path = r'C:\Users\Tchamna\Downloads\UTRC_DATA\test'

filenames = glob.glob(path + "/*.xlsx")
print(filenames)

### Dataframe Initialization
concat_all_sheets_all_files = pd.DataFrame()


for file in filenames:

        ### Get all the sheets in a single Excel File using  pd.read_excel command, with sheet_name=None
        ### Note that the result is given as an Ordered Dictionary File
        ### Hell can be found here: https://pandas.pydata.org/pandas-docs...

        df = pd.read_excel(file, sheet_name=None, skiprows=None,nrows=None,usecols=None,header = 0,index_col=None)
        #df = pd.read_excel(file, sheet_name=None, skiprows=0,nrows=34,usecols=105,header = 9,index_col=None)

        #print(df)

        ### Use pd.concat command to Concatenate pandas objects as a Single Table.
        concat_all_sheets_single_file = pd.concat(df,sort=False)



         ### Use append command to append/stack the previous concatenated data on top of each other 
        ### as the iteration goes on for every files in the folder

        concat_all_sheets_all_files=concat_all_sheets_all_files.append(concat_all_sheets_single_file)
        #print(concat_all_sheets)

Problem importing csv files to pandas to avoid "IndexError: list index out of range"

Problem importing csv files to pandas to avoid "IndexError: list index out of range"

excel

pandas

csv

spyder