Undefined variables, even though they are explicitely defined above?

Question

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Apparently, python thinks I haven't defined variables UserInput, message and HelpEmbed.

Python

@client.event
async def on_message(message):
 UserInput=message.content.split(" ")
 
 if len(UserInput)==5:
  if UserInput[0]=="!tz" or str(610890196199800852) in UserInput[0]: 
    try: 
      UserTime1=UserInput[1].split(".")
      now=datetime.utcnow()
      Date1= datetime(now.year, now.month, now.day, int(UserTime1[0], int(UserTime1[1])))  
      UserTZ1=UserInput[2]
      UserTZ2=UserInput[4] 
      TZ1=getTZ1(Date1, UserTZ1, now)
      TZ2=getTZ1(Date1, UserTZ2, now)
      Date1=timezone(TZ1).localize(datetime(now.year, now.month, now.day, int(UserTime1[0]), int(UserTime1[1]))).astimezone(timezone(TZ2))
      await message.channel.send("```"+str((Date1))+"```")

    
    except: 
      await message.channel.send("Oops! Seems like the command syntax is wrong. Try again!")
      await message.channel.send(str(traceback.format_exc()))

#end time convert

@client.event
async def displayembed():
  HelpEmbed=discord.Embed(
    title="Help Panel",
    description="Test description",
    #colour=discord.Colour.white()
  )

if UserInput[0]=="!tz" and UserInput[1]=="help":
  await message.channel.send(embed=HelpEmbed)

#end help

def getTZ1(DateInput, User_aTZ1, now):
  for TZ1Time in TimeZones:
    ConvertedTime1=utc.localize(now).astimezone(timezone(TZ1Time))
    if ConvertedTime1.tzname() == User_aTZ1.upper():
      return TZ1Time
 
# end functions

What I have tried:

Errors occur after #end time convert. Variables UserInput and message have been used and before #end time convert and work just fine. I really can't figure this out, can someone help, please? (I'm new to programming)

Note: This code uses Discord and pytz APIs (in case you don't recognise some commands and attributes)

Posted 15-Aug-19 1:01am

SourLemonn8

Updated 15-Aug-19 3:45am

v2

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Comments

ZurdoDev 15-Aug-19 7:25am

What's the error message?

It's my understanding that python does not require variable declaration.

Dave Kreskowiak 15-Aug-19 8:43am

No. Python KNOWS you haven't defined the variables properly. YOU THINK you have.

This comes down to understanding "scope". Read: https://python-textbok.readthedocs.io/en/1.0/Variables_and_Scope.html

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Richard Deeming · Answer 1 · 2019-08-15T02:30:00

message is a parameter to the on_message function. It it not available outside of that function.

UserInput is a local variable within the on_message function. It cannot be used outside of that function.

HelpEmbed is a local variable within the displayembed function. It cannot be used outside of that function.

NB: Whitespace is important. The if block after assigning HelpEmbed is not indented, so it is not part of that function.
2.1.7 Indentation[^]

Patrice T · Answer 2 · 2019-08-15T03:09:00

Quote:
Undefined variables, even though they are explicitely defined above?

Looks like you need to learn how the "scope of variables" works in Python.
When a variable is defined inside a function definition, it exist only inside that function, and anything outside can't see it.
Scope - Python Tutorial[^]
Python Tutorial: Global vs. Local Variables and Namespaces[^]

Richard MacCutchan · Answer 3 · 2019-08-15T03:45:00

Solution 3

See 9. Classes — Python 3.7.4 documentation#python-scopes-and-namespaces[^] for a full explanation of scopes in Python.

Posted 15-Aug-19 3:45am

Richard MacCutchan

Undefined variables, even though they are explicitely defined above?

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