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if condition dataframe python

df.loc[df['age1'] - df['age2'] > 0, 'diff'] = df['age1'] - df['age2']
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if else pandas dataframe

import pandas as pd

numbers = {'set_of_numbers': [1,2,3,4,5,6,7,8,9,10]}
df = pd.DataFrame(numbers,columns=['set_of_numbers'])

df.loc[df['set_of_numbers'] <= 4, 'equal_or_lower_than_4?'] = 'True' 
df.loc[df['set_of_numbers'] > 4, 'equal_or_lower_than_4?'] = 'False' 

print (df)
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python pandas if statement

df.loc[df['column name'] condition, 'new column name'] = 'value if condition is met'
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