Questions on variable changing between files.

[snippsat]

# This is File A
from fileb import bvar

bvar = 10

Think of what you do here,you just overwrite the import bvar
So the import has no meaning here.
Eg:

# fileb.py
bvar = 10

# filea.py
from fileb import bvar

avar = 99
print('var for filea {}\nvar from fileb {}'.format(avar, bvar))

Output:
var for filea 99
var from fileb 10

So here i don't overwrite the import and can use value from fileb in filea.