human
Solve the following python programming problem given the following code:
def _test_gauge_delta(cl, proto) : 
    tests = ((12, '+12'), ((- 13), '-13'), (1.2, '+1.2'), ((- 1.3), '-1.3')) 
    def _check(num, result) : 
        cl._sock.reset_mock () 
        cl.gauge ('foo', num, delta = True) 
        _sock_check (cl._sock, 1, proto, ('foo:%s|g' % result)) 
for (num, result) in tests : 
        _check (num, tests) 

    
    

    Fix the buggy line: _check (num, tests)
assistant
#Here is Python code to fix the buggy line: _check (num, tests)
.

_check (num, result)