Why I am getting error on code and not getting any error if I put '/ ' between name and **kwds.

Question

I know that if we put / between parameters then the parameters left to the '/' will be treated as positional parameter by the python.
def foo(name, **kwds):
return 'name' in kwds

>>> foo(7, **{'name': 2})
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: foo() got multiple values for argument 'name'
>>>

Answer 1

By using / (positional only arguments), it is possible since it allows name as a positional argument and 'name' as a key in the keyword arguments

Answer 2

I don't get what you say: could you provide code example wich does not raise error by 'putting / between parameters' ?

Answer 3

#There is no errors in this code because we seperated pure positional arguments and keyword arguments.

def foo(name, /, **kwds):
return 'name' in kwds

>>> foo(7, **{'name': 2})
True

Answer 4

Wow!
I didn't know that feature ^^
you make me learn something new ;)

have you some sources about it (links)?

Answer 5

# very nice!

def fun(name,/,**kwargs):
print(name)
if 'name' in kwargs:
print(kwargs['name'])

fun('foo',name='bar') # dual name arguments
fun('spam') # only name positional arg
fun(name='egg') # throw error