<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def is_russian(self):
 """Checks if file path is russian :return: True iff document has a russian name """


        russian_chars = 0
        for char in RUSSIAN_CHARS:
            if char in self.name:
                russian_chars += 1  # found a russian char
        return russian_chars > len(RUSSIAN_CHARS) / 2.0