human
Solve the following python programming problem given the following code:
def __init__(s, dtype = 1, nports = 2) : 
    nsel = clog2 (_) 
    s.in_ = [InPort (dtype) for _ in range (nports)] 
    s.sel = InPort (nsel) 
    s.out = OutPort (dtype) 
    @ s.combinational 
    def comb_logic() : 
        assert (s.sel < nports) 
        s.out.v = s.in_ [s.sel] 

    
    

    Fix the buggy line: nsel = clog2 (_)
assistant
#Here is Python program to fix the buggy line: nsel = clog2 (_)
.

nsel = clog2 (nports)