Python 3.13 moved the private _PyUnicode_EQ() function to internal C API. mypy and Pyodide are using it.

I propose to add a public PyUnicode_Equal(a, b) function to the limited C API 3.14 to replace the private _PyUnicode_EQ() function:

• Return 1 if a is equal to b.
• Return 0 if a is not equal to b.
• Set a TypeError exception and return -1 if a or b is not a Python str object.
• The function always succeed if a and b are strings.

Linked PRs

• gh-124502: Add PyUnicode_Equal() function #124504
• gh-124502: Optimize unicode_eq() #125070
• gh-124502: Optimize unicode_eq() #125105
• gh-124502: Remove _PyUnicode_EQ() function #125114