CODEWITHSUNDEEP
pythonpython-3.x
gornvix
gornvix

Reputation: 3374

Special parameters in Python 3

According to this tutorial the under the section "Special parameters" (https://docs.python.org/3/tutorial/controlflow.html#defining-functions) the following unusual function definition should be valid:

def test_special(pos1, pos2, /, pos_or_kwd, *, kwd1, kwd2):
    print("in test_special")
    print("pos1: " + pos1)
    print("pos2: " + pos2)
    print("pos_or_kwd: " + pos_or_kwd)
    print("kwd1: " + kwd1)
    print("kwd2: " + kwd2)

However I get the error:

$ python TestArgs.py
  File "TestArgs.py", line 11
    def test_special(pos1, pos2, /, pos_or_kwd, *, kwd1, kwd2):
                                 ^
SyntaxError: invalid syntax

I'm using Python version 3.7.5.

Upvotes: 0

Views: 90

Answers (1)

jsbueno
jsbueno

Reputation: 110263

The / in the list of parameters in a function definition is a new syntax allwoed from Python 3.8.0 and forward.

It is a SyntaxError in Python 3.7

Upvotes: 3

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