Answers for "python dataframe change value if condition"

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pandas lambda if else

df['equal_or_lower_than_4?'] = df['set_of_numbers'].apply(lambda x: 'True' if x <= 4 else 'False')

Posted by: Guest on November-17-2020

change pandas column value based on condition

In [41]:
df.loc[df['First Season'] > 1990, 'First Season'] = 1
df

Out[41]:
                 Team  First Season  Total Games
0      Dallas Cowboys          1960          894
1       Chicago Bears          1920         1357
2   Green Bay Packers          1921         1339
3      Miami Dolphins          1966          792
4    Baltimore Ravens             1          326
5  San Franciso 49ers          1950         1003

Posted by: Guest on May-14-2020

Source

set value based on column

df.loc[df['c1'] == 'Value', 'c2'] = 10

Posted by: Guest on July-30-2020

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