Problems with not having exceptions crash my script

[league55]

I wrote a decorator to avoid having exceptions crash my script and it's not working. Here's the wrapper:

helpers.py

def try_wrapper(func):
    """Wrapper that handles exceptions gracefully.

        :returns:       Wrapped function return value (if no error) or None (if error)
    """
    def try_wrap(*args):
        try:
            return func(*args)
            return output
        except Exception as inst:
            print(inst)
    return try_wrap

And the script so far:

validate_url.py

"""Does some basic validation of provided url

    :split_url:         Helper function using urllib.parse.urlsplit
    :validate_scheme:   Does basic validation of url scheme
"""

import urllib.parse
from helpers import try_wrapper


"""
Module constants.

    :schemes:       uri scheeas for validation
"""

schemes = ["https", "http", "ftp"]


"""Validation and helper functions.
"""

@try_wrapper
def split_url(url):
    """Splits url for other validation functions.

        :returns:       urllib.split.urlsplit object
    """
    return urllib.parse.urlsplit(url)


@try_wrapper
def validate_scheme(split_url):
    """Validates schema of url against a limited list of valid schemas.
    """
    if split_url.scheme in schemes:
        return split_url
    else:
        print("Invalid url scheme {}, must be one of {}".format(split_url.scheme, schemes))


"""Testing code to be deleted later.
"""

while True:
    url = input("Enter url: ")
    split = split_url(url)
    print(split)
    split_url = validate_scheme(split)
    print(split)

And here's the output I'm getting:

Enter url: https://bla.bla.com
SplitResult(scheme='https', netloc='bla.bla.com', path='', query='', fragment='')
SplitResult(scheme='https', netloc='bla.bla.com', path='', query='', fragment='')
Enter url: crud://www.bla.com
SplitResult(scheme='crud', netloc='www.bla.com', path='', query='', fragment='')
Invalid url scheme crud, must be one of ['https', 'http', 'ftp']
None
Enter url: ftp
SplitResult(scheme='', netloc='', path='ftp', query='', fragment='')
Invalid url scheme , must be one of ['https', 'http', 'ftp']
SplitResult(scheme='', netloc='', path='ftp', query='', fragment='')
Enter url: ftp:/
Traceback (most recent call last):
File "validate_url.py", line 41, in <module>
split = split_url(url)
TypeError: 'NoneType' object is not callable
<script crashes here>

Why is the script crashing despite my error-checking, which is intended to print a nice error message while not crashing the script?