<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_binary_file(file):
 """ Returns if given file is a binary file. :param file: File path. :type file: unicode :return: Is file binary. :rtype: bool """


    file_handle = open(file, "rb")
    try:
        chunk_size = 1024
        while True:
            chunk = file_handle.read(chunk_size)
            if chr(0) in chunk:
                return True
            if len(chunk) < chunk_size:
                break
    finally:
        file_handle.close()
    return False