How to fix ' name "xxx" is not defined

Question

In my program, I'm trying to run a "def command" in a conditional statement. An error pops up saying name 'command' is not defined.

I tried to rewrite the code and tried to reload the repl.it server many times.

def main():
   inputmain = input("...")
   if inputmain == "Yes" or "yes" or "y" or "Y":
     command()
  elif inputmain == "No" or "no" or "n" or "N":
     print("Ok.")
  else:
     print("Error")
main()
def command():
 ...
 ...
command()

I expect the output of "y" to be the program command() but it's the error above.

You've defined command() after you used it, so define it at the top — clubby789, Aug 03 '19 at 23:40
Yes, but then command() will be first. Or in this case (if it said print("......")) then it would print ...... then do everything else. — Dhruvil Mehta, Aug 03 '19 at 23:44
Defining `command` won't run it. You define it at the start so you can use it later — clubby789, Aug 03 '19 at 23:45
But when I run it with command at the top, it does command first. — Dhruvil Mehta, Aug 03 '19 at 23:48
Unless you have a good reason you shouldn't be calling command after you define it — Iain Shelvington, Aug 03 '19 at 23:49
You don't put `command()` at the top, just the `define command()` — clubby789, Aug 03 '19 at 23:49
As a side note, you need `if inputmain in ("Yes", "yes", "y", "Y"):` and the same for the "no" version instead of what you have written. Your code does not work as you intend. — brentertainer, Aug 03 '19 at 23:51

score 0 · Accepted Answer · answered Aug 03 '19 at 23:58

The comments were growing long. Here is an amended version of your code. As you can see, I am not calling command() anywhere except in the main() function.

The command() function does not need to be defined before main() is defined. It just needs to be defined before main() is executed because main() may potentially call on it.

def main():
   inputmain = input("...")
   if inputmain in ("Yes", "yes", "y", "Y"):
        command()
   elif inputmain in ("No", "no", "n", "N"):
        print("Ok.")
   else:
        print("Error")

def command():
    print(1)

main()

@DhruvilMehta I understand you are new. It is typical for the person posing the question to upvote/downvote the responses accordingly and/or select a response as the accepted answer. No need to comment unless the response needs editing or clarification. I'm happy to have helped. — brentertainer, Aug 04 '19 at 00:05

How to fix ' name "xxx" is not defined

1 Answers1