Bug Fix: Fixed inconsistency in the constraint solver with respect to literal types. They were being retained for most classes but not for tuples.
Bug Fix: Fixed bug in parser that resulted in a false negative when a for keyword (in either a for statement or a list comprehension) was followed immediately by in keyword.
Behavior Change: Enforce PEP 484 rules for symbols that are imported by a stub file but are not meant to be re-exported. These symbols are no longer resolved when accessed outside of the module, nor are they included in completion suggestions or other language service providers.
Behavior Change: Modified logic for private symbols (whose names begin with an underscore) exported from a stub file or a py.typed source file; if the symbol is explicitly included in __all__ it is not considered private.
Enhancement: Added reportPrivateImportUsage diagnostic rule, which reports usage of a symbol from a py.typed library that is not intended to be re-exported by the library's author. The rule is on by default in basic type checking mode but can be disabled. Completion provider no longer offers these symbols as completion suggestions.
Bug Fix: Fixed bug that resulted in incorrect type evaluation when co-dependent variables were assigned in a loop using tuple assignments (e.g. a, b = b, a + 1).
Bug Fix: Improved isinstance and issubclass support to handle the case where the type of the second argument is a union where the subtypes includes both tuples of class types and non-tuples.
Enhancement: Updated typeshed to latest version