remove leading and lagging spaces dataframe python

1cols = df.select_dtypes(['object']).columns
2df[cols] = df[cols].apply(lambda x: x.str.strip())
3print (df)
4                     A    B     C
50                  A b  NaN   3.0
61                  NaN  NaN   3.0
72               random  NaN   4.0
83  any txt is possible  2 1  22.0
94                       NaN  99.0
105                 help  NaN   NaN

1df = df.applymap(lambda x: x.strip() if isinstance(x, str) else x)
2print (df)
3                     A    B     C
40                  A b    2   3.0
51                  NaN    2   3.0
62               random   43   4.0
73  any txt is possible  2 1  22.0
84                        23  99.0
95                 help   23   NaN