df = pd.read_csv('file.csv') 将随机数和逗号添加到文件中。 Pandas 在 python

Question

I am trying to read a csv file using pandas as so:我正在尝试使用 pandas 读取 csv 文件，如下所示：

df = pd.read_csv('file.csv')

Here is the file before:这是之前的文件：

,schoolId,Name,Meetings Present
0,991,Jimmy Nuetron,2
1,992,Jimmy Fuetron,6
2,993,Cam Nuetron,4

Here is the file after:这是之后的文件：

,Unnamed: 0,schoolId,Name,Meetings Present
0,0.0,991.0,Jimmy Nuetron,2.0
1,1.0,992.0,Jimmy Fuetron,6.0
2,2.0,993.0,Cam Nuetron,4.0
0,,,,3

Why is it adding the numbers and columns when I run the read_csv method?为什么在我运行 read_csv 方法时添加数字和列？

How can I prevent this without adding a seperator?如何在不添加分隔符的情况下防止这种情况发生？

Answer 1

pandas.read_csv is actuallly not adding the column Unnamed: 0 because it already exists in your .csv (who apparently/probably was generated by the method pandas.DataFrame.to_csv ). pandas.read_csv实际上没有添加列Unnamed: 0因为它已经存在于您的.csv中（显然/可能是由方法pandas.DataFrame.to_csv生成的）。

You can get rid of this (extra) column by making it as an index:您可以通过将其作为索引来摆脱这个（额外的）列：

df = pd.read_csv('file.csv', index_col=0)