从dataframe行中删除特殊字符

import pandas as pd
import re

df = pd.DataFrame({'col1': ['abc', 'def@', 'ghi#', 'jkl$']})

df['col1'] = df['col1'].apply(lambda x: re.sub('[^a-zA-Z0-9]', '', x))

print(df)

  col1
0  abc
1  def
2  ghi
3  jkl