NameError: name 'FunctionName' is not defined

Question

I have two files. One named MainMenu.py another named MissionMenu.py for a simple text game I was making. But I ran into an issue (I'm still rather new to this) that is giving me a NameError:.

The first file looks like this

from MissionMenu import *
def mainMenu():
    x = input("Type Something:")
    missionMenu()
mainMenu()

The second File looks like this

from MainMenu import *
def missionMenu():
    x = input("Type something else:")
    mainMenu()
missionMenu()

The error says NameError: name 'missionMenu' is not defined

Oh no, that's not how import works, you don't include .py while importing... — J Arun Mani, May 12 '20 at 18:41
kindly look at: https://docs.python.org/3/reference/import.html#package-relative-imports — Gahan, May 12 '20 at 18:42
Next time, please say which snippet is located on which file, that will help a lot... — J Arun Mani, May 12 '20 at 18:43
Figured it was obvious which snippet was located on which file. — ElderSapling, May 12 '20 at 18:57

score 0 · Answer 1 · answered May 12 '20 at 18:43

0

look at this: Call a function from another file in Python

You are using import incorrectly. Yo don't need to add .py

from MissionMenu import missionMenu
def mainMenu():
    x = input("Type Something:")
    missionMenu()
mainMenu()

also, it's a bad idea in each file to import the other. kind of circular loop. Think which file really needs the other one. Probably they don't need to import each other

answered May 12 '20 at 18:43

Roim

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There is no way of looping between files? – ElderSapling May 12 '20 at 18:57
1

it's a bad design, even you could. It can cause circular dependencies. Every script should have different purpose – Roim May 12 '20 at 18:58

score 0 · Answer 2 · answered May 12 '20 at 18:43

First of all you do not need a .py.

Suppose, If you have a file a.py and inside you have some functions:

def b():
  # Something
  return 1

def c():
  # Something
  return 2

And you want to import them in z.py you have to write

from a import b, c

Source and Details : Call a function from another file in Python

finnmglas · Answer 3 · 2020-05-12T19:07:08.507

0

Two issues about your code:

Imports

To import a file called MainMenu.py:

import MainMenu

So do not use .py after that name.

Dependencies

You should keep your dependencies straight:

Do not import MissionMenu from MainMenu that imports MissionMenu
Just keep it simple ^^

Edit:

If you want to have multiple scripts that contain different menus, just create a function in those scripts (they are called modules then).

Import them in your main application (don't import the main script in the module) and run the function from the main file.

Hope this is helpful ^^

edited May 12 '20 at 19:07

answered May 12 '20 at 18:48

finnmglas

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There is no way of returning to the original file? – ElderSapling May 12 '20 at 18:57
@ElderSapling I added a section in my answer, telling you how to use code from multiple files – finnmglas May 12 '20 at 19:08

NameError: name 'FunctionName' is not defined

3 Answers3

Imports

Dependencies