human
Complete the below
@register_check
def module_imports_on_top_of_file(logical_line, indent_level, checker_state, noqa):

    ''''Place imports at the top of the file.
    Always put imports at the top of the file, just after any module comments
    and docstrings, and before module globals and constants.
    Okay: import os
    Okay: # this is a comment\nimport os
    Okay: \'\'\'this is a module docstring\'\'\'\nimport os
    Okay: r\'\'\'this is a module docstring\'\'\'\nimport os
    Okay:
    try:\n\timport x\nexcept ImportError:\n\tpass\nelse:\n\tpass\nimport y
    Okay:
    try:\n\timport x\nexcept ImportError:\n\tpass\nfinally:\n\tpass\nimport y
    E402: a=1\nimport os
    E402: \'One string\'\n"Two string"\nimport os
    E402: a=1\nfrom sys import x
    Okay: if x:\n    import os'
    '''

Can you provide a the Python code you requested?
assistant
#Here is the Python code you requested.
    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