human
Solve the following python programming problem given the following code:
def extract_path_info(environ_or_baseurl, path_or_url, charset = 'utf-8', errors = 'replace', collapse_http_schemes = True) : 
    "Extracts the path info from the given URL (or WSGI environment) and
    path.  The path info returned is a unicode string, not a bytestring
    suitable for a WSGI environment.  The URLs might also be IRIs.

    If the path info could not be determined, `None` is returned.

    Some examples:

    >>> extract_path_info('http://example.com/app', '/app/hello')
    u'/hello'
    >>> extract_path_info('http://example.com/app',
    ...                   'https://example.com/app/hello')
    u'/hello'
    >>> extract_path_info('http://example.com/app',
    ...                   'https://example.com/app/hello',
    ...                   collapse_http_schemes=False) is None
    True

    Instead of providing a base URL you can also pass a WSGI environment.

    .. versionadded:: 0.6

    :param environ_or_baseurl: a WSGI environment dict, a base URL or
                               base IRI.  This is the root of the
                               application.
    :param path_or_url: an absolute path from the server root, a
                        relative path (in which case it's the path info)
                        or a full URL.  Also accepts IRIs and unicode
                        parameters.
    :param charset: the charset for byte data in URLs
    :param errors: the error handling on decode
    :param collapse_http_schemes: if set to `False` the algorithm does
                                  not assume that http and https on the
                                  same server point to the same
                                  resource.
    " 
    def _normalize_netloc(scheme, netloc) : 
        parts = netloc.split ('@', 1) [(- 1)].split (':', 1) 
        if (len (parts) == 2) : 
            (netloc, port) = parts 
            if (((scheme == 'http') and (port == '80')) or ((scheme == 'https') and (port == '443'))) : 
                port = None 
else : 
            netloc =...

    
    

    Fix the buggy line: base_iri = uri_to_iri (environ_or_baseurl, charset, scheme)
assistant
#Here is Python program to fix the buggy line: base_iri = uri_to_iri (environ_or_baseurl, charset, scheme)
.

base_iri = uri_to_iri (environ_or_baseurl, charset, errors)