Python Pandas：如何使用.apply（）将两个或多个参数/列值传递给自定义函数

Question

I am trying to write a custom function which takes 3 inputs and is basically checking the length of Full Name(First+Last) > Occupation.I have tries 2 variations of apply but both are giving an error. PS I am rookie in Python and Pandas area.

def check(fname,lname,occu):
if(len(fname)+len(lname)>len(occu)):
    return True
else:
    return False

customers.apply(lambda x: check(x['First Name'],x['Last Name'],x['Occupation']),axis=1)

Answer 1

The immediate error is probably a typo, ie you need len(lname) rather than lname(lname) . But you don't need a row-wise loop. You can call pd.Series.str.len instead:

df['CheckFlag'] = (df['First Name'].str.len() + df['Last Name'].str.len()) > \
                  df['Occupation'].str.len()