[Python] Python doesn't recognize all global variables [closed]

This has been asked before but the examples do not match this simple use case.

Module One.py

varname = 'var'
var = 0


Module Two.py

from One import *

def checkname():
if (varname == 'not var'):
print ('not var')
print (var)


When I run this, I get the error on line print (var)

UnboundLocalError: cannot access local variable 'var' where it is not associated with a value

So the global name varname is recognized and used, but the global name var is not used and instead seems to thought of as a local variable.

If I do print(globals()) I can see both varname and var shown as global variables.

If module Two is modified to

from One import *

def checkname():
global var

if (varname == 'not var'):
print ('not var')
print (var)


Then this works. But why did I not have to really make it global varname, var

Why did it allow varname without declaring it global while it didn't allow the use of var?

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