which is "better"?

[Skaperen]

which is "better"?

    if opt[0].lower()=='-n':
        ...

or:

    if opt[0] in ('-n','-N'):
        ...

?

[wavic]

I like first one. However, I would use argparse.

[Skaperen]

how do you know my use case fits argparse?  or is it that you know that all your future use caes will?

[Windspar]

you always could look at bytecode to see which one you like

import dis

def lower(a):
    a.lower() == 'a'
    
def isin(a):
    a in ['a', 'A']
    
dis.dis(lower)

print()

dis.dis(isin)

---

output

  4           0 LOAD_FAST                0 (a)
              2 LOAD_ATTR                0 (lower)
              4 CALL_FUNCTION            0
              6 LOAD_CONST               1 ('a')
              8 COMPARE_OP               2 (==)
             10 POP_TOP
             12 LOAD_CONST               0 (None)
             14 RETURN_VALUE

  7           0 LOAD_FAST                0 (a)
              2 LOAD_CONST               3 (('a', 'A'))
              4 COMPARE_OP               6 (in)
              6 POP_TOP
              8 LOAD_CONST               0 (None)
             10 RETURN_VALUE