script to check variables in env files before commit

checkenvfiles.py

import os.path

listvars=[]
listexvars=[]
varsnotlisted=[]

my_path = os.path.abspath(os.path.dirname(__file__))
filevar = os.path.join(my_path,"../../.env")
filevarex = os.path.join(my_path,"../../.env.example")

if not os.path.isfile(filevar):
    print("File .env doesn't exist...")
    exit(2)

if not os.path.isfile(filevarex):
    print("File .env.example doesn't exist...")
    exit(2)

with open(filevar, 'r') as fp:
    read_lines = fp.readlines()
    for var in read_lines:
        if not var.strip():
            continue
        elif '#' in var:
            continue
        else:
            start = step = None
            stop = var.find('=')
            mycleanvar = var[start:stop:step]
            listvars.append(mycleanvar)

with open(filevarex, 'r') as fp:
    read_lines = fp.readlines()
    for var in read_lines:
        if not var.strip():
            continue
        elif '#' in var:
            continue
        else:
            start = step = None
            stop = var.find('=')
            mycleanvar = var[start:stop:step]
            listexvars.append(mycleanvar)

for var in listvars:
    if var not in listexvars:
        varsnotlisted.append(var)

if len(varsnotlisted) > 0:
    for var in varsnotlisted:
        print("The variable {0} is not in var.example...".format(var))
    exit(2)