如何设置限制 python dataframe 列长度？

Question

Can I set the limit of a column's value char legnth in py dataframe?

For example, in my CSV there are few columns which char value is more than 255 but I need to trim everything which is more than 255 characters. As the CSV is huge so I cannot do it in excel.

I tried the below:

import pandas as pd

df1 = pd.read_csv (r'C:\Users\file.csv')
print (df1)

Answer 1

You can trim the length of a given column to its first 255 characters with the following line:

df1[column] = df1[column].str[:255]