Mypy: Using unions in mapping types does not work as expected

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Code Analysis and Linter Static Type Checker Python Types Typing

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  • mypy

    Optional static typing for Python

    If you typed it as Mapping instead of dict then it would be theoretically be type safe but its actually not supported. See mypy issue #1114. Only the value type is covariant for now.

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    The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

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