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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 create_symlink(local_file, symlink_path):
 """Create a relative symbolic link if symlink path is given. Parameters local_file relative path to output folder (includes ./ prefix) of file saved symlink_path relative path to output folder (includes ./ prefix) of symbolic link to be created Returns ------- bool success code """

    if symlink_path is not None:
        if os.path.exists(symlink_path) or os.path.lexists(symlink_path):
            os.unlink(symlink_path)
        local_file = os.path.normpath(local_file)
        symlink_path = os.path.normpath(symlink_path)
        num_dirs_upward = len(os.path.dirname(symlink_path).split(os.sep))
        local_relative_to_symlink = num_dirs_upward * (os.pardir + os.sep)
        os.symlink(os.path.join(local_relative_to_symlink, local_file),
            symlink_path)

    return True