[Tutor] Test for type(object) == ???

[boB Stepp]

On Fri, Feb 10, 2017 at 11:49 PM, eryk sun <eryksun at gmail.com> wrote:
> On Sat, Feb 11, 2017 at 3:22 AM, boB Stepp <robertvstepp at gmail.com> wrote:
>>
>> py3: help(repr)
>> Help on built-in function repr in module builtins:
>>
>> repr(obj, /)
>>     Return the canonical string representation of the object.
>>
>>     For many object types, including most builtins, eval(repr(obj)) == obj.
>>
>> Question:  What does the forward slash represent in this context?
>
> It's from the function's __text_signature__.
>
>     >>> repr.__text_signature__
>     '($module, obj, /)'
>
> It means "obj" is a positional-only argument that cannot be passed as a keyword.

[snip]

> Look at open() for comparison.
>
>     >>> open.__text_signature__
>     "($module, /, file, mode='r', buffering=-1, encoding=None,\n
>     errors=None, newline=None, closefd=True, opener=None)"

In your comparison example, a forward slash appears again, but this
time after "$module" in the location where "obj" previously appeared
in the repr example.  Is it indicating a similar use here?

Can you provide a link to "__text_signature__" in the docs?  I tried
searching for it, but came up empty.


-- 
boB