pandas dataframe apply function with multiple arguments
def some_func(row, var1):
return '{0}-{1}-{2}'.format(row['A'], row['B'], var1)
df['C'] = df.apply(some_func(row, var1='DOG'), axis=1)
df
A B C
0 foo x foo-x-DOG
1 bar y bar-y-DOG
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