I want to know how to write 'if' statement while checking email. If it is returning True and email is valid I want to write it to the text file comparing if the email is existing already duplicated in the save output file.

from validate_email import validate_email
import os

def email_validator():
    global reqs, _lock, success, fails

    with open(os.path.join("./emails.txt"), "r") as f:
        for line in f:
            line.strip()
            print("checking email: "  line)
            is_valid = validate_email(
                email_address=line,
                check_format=True,
                check_blacklist=False,
                check_dns=True,
                dns_timeout=10,
                check_smtp=True,
                smtp_timeout=10,
                smtp_helo_host='my.host.name',
                smtp_from_address='[email protected]',
                smtp_skip_tls=False,
                smtp_tls_context=None,
                smtp_debug=False
            )
            

            if validate_email.__code__ == 200:
                print(f'Email {is_valid} is valid : {success} ')
                success  = 1

                with open("./validated_emails.txt", 'r ') as f:
                    valid_emails = f.read()
                    if line not in valid_emails:
                        f.write(line.strip()   '\n')
                    else:
                        print("Not valid Email!")
                        fails  =1                                              
            elif validate_email == False:
                fails  = 1
                continue

CodePudding user response：

A couple of important misunderstandings to clear up first:

1. validate_email is a function. To get the result of a function, we call it with () following the function name. You already do this on line 11 with is_valid = validate_email(*args).
   The variable is_valid is now storing the result of validate_email() This is probably either True, False or None. I couldn't figure out exactly what module you're using for validation, as the validate_email module I installed from pip only has 5 parameters in the function definition.

2. On line 27, you have validate_email.__code__ == 200. This will ALWAYS be False.
   __code__ is an attribute of of the validate_email function and represents the literal code of the function as a code object. It does not represent the last return value of the function.

3. Likewise, on line 38, you have if validate_email == False. This will also ALWAYS be a false comparision. validate_email is a object, and will never == False.

Here's my take on correcting your code, but without being able to verify the exact validate_email module you are using, it might not be correct:

from validate_email import validate_email
import os

def email_validator():
    global reqs, _lock, success, fails

    with open(os.path.join("./emails.txt"), "r") as f:
        for line in f:
            line.strip()
            print("checking email: "  line)
            is_valid = validate_email(
                email_address=line,
                check_format=True,
                check_blacklist=False,
                check_dns=True,
                dns_timeout=10,
                check_smtp=True,
                smtp_timeout=10,
                smtp_helo_host='my.host.name',
                smtp_from_address='[email protected]',
                smtp_skip_tls=False,
                smtp_tls_context=None,
                smtp_debug=False
            )
            

            if is_valid:
                success  = 1
                print(f'Email {is_valid} is valid : {success} ')
                with open("./validated_emails.txt", 'r ') as f:
                    valid_emails = f.read()
                    if line not in valid_emails:
                        f.write(line.strip()   '\n')
                                                         
            else:
                fails  = 1
                print(f"{line} is not a valid email : {fails}")
                # continue  # This is not needed when we're at the end of the loop