Importing a variable from a function?

Question

My problem is that I want to use a variable from a def function, I don't know how to do it or if I even can. Here's the code I'm using

def yandn(prompt='Y/N:'):
    no=1
    while no==1:
      ok=input(prompt)
      if ok.lower()==('y'):
        a=0
        b=0
        break
    elif ok.lower()==('n'):
      a=1
      b=0
print('Blah Blah Blah')
c=1
while c==1:
  d=input('Blah Blah:')
  if d.lower() in valid:
    print('Confirm', d, 'as blah.')
    yandn()
    from yandn import a
    if a==1:
      c=1
    else:
      c=0

You could 'return a' from yandn

C R
– C R

2016-12-04 00:03:15 +00:00
Commented Dec 4, 2016 at 0:03 — C R
– C R, Commented Dec 4, 2016 at 0:03

Pythonista · Accepted Answer · 2016-12-03 23:56:08Z

3

No. You can't import things from a function. Why not have yandn return a?

answered Dec 3, 2016 at 23:56

Pythonista

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Comments

Skycc · Accepted Answer · 2016-12-05 01:56:29Z

1

You can't import from function. There is 2 way you can achieve the same, 1 is through global variable, the other 1 is to return variable a from the function which is more recommended.

Using global variable

a = None # initialize global var
def yandn(prompt='Y/N:'):
    global a # indicate a as global var
    # continue with function code

yandn()
# no need import, now var a is accessible

Using return

a = yandn()
# you got the var a from yandn function now

edited Dec 5, 2016 at 1:56

answered Dec 4, 2016 at 0:11

Skycc

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5 Comments

Jamarcus Marleno Over a year ago

"global variable 'a' is undefined at the module level"

Skycc Over a year ago

before function yandn is called, global var a does not exist, you can initialize it outside the function with a=None

Jamarcus Marleno Over a year ago

But c=1 so that it can be the catalyst for the while loop, I'm trying to make c=0 when a=1 and a is in the function yandn, I'm trying to do this so that I can save space on my code and not do tedious "if y==1" constantly. P.S the last comment was removed because I felt it would cause confusion.

Skycc Over a year ago

i still can't get what you mean, after added global a in function yandn and remove the line from yandn import a, what are the thing that not works now ?

Jamarcus Marleno Over a year ago

Never mind, I understand now thanks to both of your answers, thank you.

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