[mypy] Fix type annotation in euler_method.py (#5649)
* [mypy] Fix type annotation in euler_method.py
In line with issue #4052.
* updating DIRECTORY.md
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poloso committed
61e1dd27b0db00302cec75fca5365d08e81ab707
Parent: 11a15cc
Committed by GitHub <noreply@github.com>
on 10/28/2021, 8:31:32 PM