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dmypy — Type check Python code, running `mypy` as a daemon for better speed. See also: `mypy`. More informat

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the dmypy command: Type check Python code, running mypy as a daemon for better speed. See also: mypy. More information: <https://mypy.readthedocs.io/en/stable/mypy_daemon.html>.

Solution

dmypy — Type check Python code, running mypy as a daemon for better speed. See also: mypy. More information: <https://mypy.readthedocs.io/en/stable/mypy_daemon.html>.

Type check a file, and start the daemon if it is not running:

dmypy run -- {{path/to/file.py}}

Start the daemon:

dmypy start

Type check a file (requires the daemon to be running):

dmypy check -- {{path/to/file.py}}

Stop the daemon:

dmypy stop

Code Snippets

Type check a file, and start the daemon if it is not running

dmypy run -- {{path/to/file.py}}

Start the daemon

dmypy start

Type check a file (requires the daemon to be running)

dmypy check -- {{path/to/file.py}}

Stop the daemon

dmypy stop

Context

tldr-pages: common/dmypy

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