human
Solve the following python programming problem given the following code:
@ pytest.fixture (scope = 'module', params = ['cpu']) 
def backend_cpu64(request) : 
    '
    Fixture that returns a cpu backend using 64 bit dtype.
    For use in tests like gradient checking whihch need higher
    precision
    ' 
    be = get_backend (be, datatype = np.float64) 
    def cleanup() : 
        be = request.getfuncargvalue ('backend_cpu64') 
        del be 
request.addfinalizer (cleanup) 
    return be 

    
    

    Fix the buggy line: be = get_backend (be, datatype = np.float64)
assistant
#Here is Python program to fix the buggy line: be = get_backend (be, datatype = np.

be = get_backend (request, datatype = np.float64)