Password generator using python

import random

lc="abcdefghijklmnopqrstuvwxyz"

uc="ABCDEFGHIJKLMNOPQRSTUVWXYZ"

nm="1234567890"

sm="!@#$%^&*( ):;,./<>?"

min_len=2

max_len=2

total_length=8

def generate_password(group,min_length,max_length):

    length=random.randint(min_length,max_length)

    sample=random.sample(group,length)

    string="".join(sample)

    return string

def generate_string():

    lower_string=generate_password(lc,min_len,max_len)

    upper_string=generate_password(uc,min_len,max_len)

    number=generate_password(nm,min_len,max_len)

    symbol=generate_password(sm,min_len,max_len)

    password=lower_string+upper_string+number+symbol

    if len(password)==total_length:

         password="".join(random.sample(password,len(password)))

         return password

    else:

        return generate_password()

print(generate_string())