global variables not being updated/ imported properly across modules

Question

in the code below when function delta is imported from main.py values of d1and v1are not being imported properly but when i paste the function delta in the same file as function t values are imported correctly. why does this happen ? what can i do to get proper values when imported from different file?

# stuff.py
from env import v1,d1

def delta ():
   global d1,v1
   gas = d1 + v1
   print (gas)

#sus.py
from env import d1,v1,idd,m
from main import delta
def t():
    global two
    global d1,v1,idd,m
    two = two -1

    if m ==0:           
     if idd ==1 :
         d1 = 2 
         idd = 0
     elif idd ==0:
          v1 =2
          delta()
          idd =2
       

i did try adding print statements to check value of d1 and v1 inside delta and the value is 0 . and as i have mentioned above the error is fixed if i place function delta in same file as functiont