Applymap capwords to multiple columns only if values are UPPERCASE-CodePudding

I have a dataframe with multiple blank values and different data types per column. For example I have the following dataframe I want to select the columns "Name", "Country" and "Job" and apply capwords to all this column only if value is ALL CAPSLOCK (can convert all into str before and that is not a problem). So this dataframe:

ID  Name    Country Job
1   PAULO   BRAZil  JOHN'S DRIVER
2   Joao    $   -
3   Maria   np.nan  DriveR
3   MARIA   Portugal    DRIVER
4   PEdro   ARGENTINA   DRIVER

Would return this output:

ID  Name    Country Job
1   Paulo   BRAZil  John's Driver
2   Joao    $   -
3   Maria   np.nan  DriveR
3   Maria   Portugal    Driver
4   PEdro   Argentina   Driver

What would be the best way to do it?

CodePudding user response：

Let's try applymap for each value

import string

cols = ['Name', 'Country', 'Job']

df[cols] = df[cols].applymap(lambda val: string.capwords(val) if val.isupper() else val)

print(df)

   ID   Name    Country            Job
0   1  Paulo     BRAZil  John's Driver
1   2   Joao          $              -
2   3  Maria     np.nan         DriveR
3   3  Maria   Portugal         Driver
4   4  PEdro  Argentina         Driver
5   5  PEdro  Argentina         Driver