CODEWITHSUNDEEP
python
Sean Wilson
Sean Wilson

Reputation: 53

TypeError: append() takes exactly one argument (0 given) How to resolve?

Hey thank you for taking the time to help me out, I'll cut straight to the point: This is just a small project I've started to practice my Python skills before my GCSE the current issue I'm having is appending a number to a list as I have gone through each part of the program I've managed to resolve all current issues, however, I have been unable to resolve this issue all/any feedback concerning this issue/ making the program more efficient would be appreciated. Thank you.

##code##
name = input("hello user what is your name?")
print("thank you for using our program:",name.title(),)
userchoice = input("which program would you like to use: add numbers,minus 
numbers, alphabetical word order?")
#add numbers#
numList = []
addnewnumber = input ("would you like to add a new number?")
while addnewnumber == 'yes':
    newnumber = input("what is your number?")
    numList.append()
if addnewnumber == 'no':
    numListsum = sum(numList)
    print (numListsum)

 ##Console message##
RESTART: C:/Users/SWILS/AppData/Local/Programs/Python/Python36/python 
coding/1.0.py 
hello user what is your name?sean
thank you for using our program: Sean
which program would you like to use: add numbers,minus numbers, alphabetical 
word order?add numbers
would you like to add a new number?yes
what is your number?6
Traceback (most recent call last):
File "C:/Users/SWILS/AppData/Local/Programs/Python/Python36/python 
coding/1.0.py", line 11, in <module>
numList.append()
TypeError: append() takes exactly one argument (0 given)

Upvotes: 3

Views: 45414

Answers (5)

Vansh Bhardwaj
Vansh Bhardwaj

Reputation: 446

this works for me -- >

append((item1 , item2))

Upvotes: 16

Dharmesh Fumakiya
Dharmesh Fumakiya

Reputation: 2338

The correct syntax is like this:

numList = []
addnewnumber = input ("would you like to add a new number?")
while addnewnumber == 'yes':
    newnumber = input("what is your number?")
    numList.append(newnumber)

The problem was that you needed to pass a value to the append method of numList, for it to append.

Upvotes: 0

Matt Takao
Matt Takao

Reputation: 2996

  • actually append something inside the append function
  • fix the while loop

code updated to do what you want:

name = input("hello user what is your name?")
print("thank you for using our program:",name.title(),)
userchoice = input("which program would you like to use: add numbers,minus 
numbers, alphabetical word order?")
#add numbers#
numList = []
addnewnumber = input ("would you like to add a new number?")
while addnewnumber == 'yes':
    newnumber = input("what is your number?")
    numList.append(newnumber)
    addnewnumber = input ("would you like to add a new number?")
numListsum = sum(numList)
print (numListsum)

Upvotes: 0

Abe
Abe

Reputation: 1415

Your numList.append() must have a paramter.
So , change to this numList.append(newnumber).

Upvotes: 2

Robᵩ
Robᵩ

Reputation: 168636

The error message means exactly what it says: .append() expects you to pass one parameter, but you've actually passed no parameters. Try this:

numList.append(newnumber)

Upvotes: 0

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