定义变量时出现名称错误[暂停]

Question

Here is my code: https://pastebin.com/XssyGGud I get this error:

Traceback (most recent call last):
  File "main.py", line 163, in <module>
    menue()
  File "main.py", line 124, in menue
    if progress == 0:
NameError: name 'progress' is not defined

I am using python 3.7.4 on linux.

Answer 1

In [64]: a
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-64-3f786850e387> in <module>
----> 1 a

NameError: name 'a' is not defined

In [65]: try: 
    ...:     if a==0: 
    ...:         print('a is 0') 
    ...: except: 
    ...:     print('No errors to see here') 
    ...: 
No errors to see here

In [66]: try: 
    ...:     if a==0: 
    ...:         print('a is 0') 
    ...: except NameError: 
    ...:     print('No errors to see here') 
    ...: 
No errors to see here