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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def redact_http_basic_auth(output):
    '''
    Remove HTTP user and password
    '''
    # We can't use re.compile because re.compile(someregex).sub() doesn't
    # support flags even in Python 2.7.
    url_re = '(https?)://.*@'
    redacted = r'\1://<redacted>@'
    if sys.version_info >= (2, 7):
        # re.sub() supports flags as of 2.7, use this to do a case-insensitive
        # match.
        return re.sub(url_re, redacted, output, flags=re.IGNORECASE)
    else:
        # We're on python 2.6, test if a lowercased version of the output
        # string matches the regex...
        if re.search(url_re, output.lower()):
            # ... and if it does, perform the regex substitution.
            return re.sub(url_re, redacted, output.lower())
    # No match, just return the original string
    return output