python - TypedDict when keys have invalid names

Question

If I have a key in a dictionary with an invalid identifier, such as A(2). How can I create a TypedDict with this field?

E.g

from typing import TypedDict

class RandomAlphabet(TypedDict):
    A(2): str

is not valid Python code, resulting in the error:

SyntaxError: illegal target for annotation

The same problem is with reserved keywords:

class RandomAlphabet(TypedDict):
    return: str

throws:

SyntaxError: invalid syntax

Answer 1

According to PEP 589 you can use alternative syntax to create a TypedDict as follows:

Movie = TypedDict('Movie', {'name': str, 'year': int})

So, in your case, you could write:

from typing import TypedDict

RandomAlphabet = TypedDict('RandomAlphabet', {'A(2)': str})

or for the second example:

RandomAlphabet = TypedDict('RandomAlphabet', {'return': str})

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PEP 589 warns, though:

This syntax doesn't support inheritance, however, and there is no way to have both required and non-required fields in a single type. The motivation for this is keeping the backwards compatible syntax as simple as possible while covering the most common use cases.