Using this code:

frommatplotlib.datesimportDateFormatterdate_fmt="%H:%M:%S"date_formatter=DateFormatter(date_fmt)

Running Mypy instrict mode results in an erorr:

$ mypy --strict main.py main.py:4: error: Call to untyped function "DateFormatter" in typed context  [no-untyped-call]Found 1 error in 1 file (checked 1 source file)

We'd run Mypy instrict mode across all of our code base to catch programming errors and would like to use it with matplotlib without the need to suppress errors like this.

Environment

• Python 3.11.11
• matplotlib 3.10.1
• mypy 1.15.0

Related References

• Support type checking with mypy #20504
• Initial implementation of type stubs (mypy/PEP484) #24976