human
I wrote the below code

    def is_string_literal(line):
        if (line[0] in 'uUbB'):
            line = line[1:]
        if (line and (line[0] in 'rR')):
            line = line[1:]
        return (line and ((line[0] == '"') or (line[0] == "'")))
    allowed_try_keywords = ('try', 'except', 'else', 'finally')
    if indent_level:
        return
    if (not logical_line):
        return
    if noqa:
        return
    line = logical_line
    if (line.startswith('import    ') or line.startswith('from    ')):
        if checker_state.get('seen_non_imports', False):
            (yield (0, 'E402    module    level    import    not    at    top    of    file'))
    elif re.match(DUNDER_REGEX, line):
        return
    elif any((line.startswith(kw) for kw in allowed_try_keywords)):
        return
    elif is_string_literal(line):
        if checker_state.get('seen_docstring', False):
            checker_state['seen_non_imports'] = True
        else:
            checker_state['seen_docstring'] = True
    else:
        checker_state['seen_non_imports'] = True

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def module_imports_on_top_of_file(logical_line, indent_level, checker_state, noqa):