[docs] [issue12434] Strengthen 2.7 io types warning

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> The error Terry sees gets thrown here (in Modules/_io/stringio.c):
> 
>     if (!PyUnicode_Check(obj)) {
>         PyErr_Format(PyExc_TypeError, "string argument expected, got '%s'",
>                      Py_TYPE(obj)->tp_name);
>         return NULL;
>     }
> 
> Therefore, I propose to change this error message to:
> 
> "unicode argument expected, got '%s'"
> 
> as Terry suggested.
> 
> Adding Antoine, Benjamin and Daniel (listed as experts on IO) to nosy.
> 
> Is there an objection to making this change in the error message?

No, the proposal is right.

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<http://bugs.python.org/issue12434>
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