Error while appending in a list in python

Question

this is for a school project and this is just a part of the code where the error exists the error comes when i try to append my second variable

 def info():
    f=open('info.txt','a')
    ch='y'
    while ch=='y':
        l=[]
        x=raw_input('enter staff id')
        l=l.append(x)
        dob=raw_input("enter date of birth")
        l=l.append(dob)
        doj=raw_input('enter date of joining')
        l=l.append(doj)
        t=raw_input('enter duty time')
        l=l.append(t)
        sal=input('enter salary per month')
        l=l.append(sal)
        f.append(l)
        ch=raw_input('want to enter more info')

The error:

Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    info()
  File "C:/Python27/staff info.py", line 9, in info
    l=l.append(dob)
AttributeError: 'NoneType' object has no attribute 'append'

Asked By: Sarthak Kinger

||

Source

Answer 1

list.append() returns None because the list is altered in place.

Don’t assign the return value, there is no need to:

x=raw_input('enter staff id')
l.append(x)

Answered By: Martijn Pieters

Error while appending in a list in python

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