REFACTOR: improve import_nastran method #91

Job	Run time
Documentation style check	25s
Check the title of the pull request	3s
Build wheelhouse and smoke tests (ubuntu-latest, 3.7)	2m 42s
Build wheelhouse and smoke tests (ubuntu-latest, 3.8)	3m 59s
Build wheelhouse and smoke tests (ubuntu-latest, 3.9)	2m 49s
Build wheelhouse and smoke tests (ubuntu-latest, 3.10)	2m 21s
Build wheelhouse and smoke tests (ubuntu-latest, 3.11)	2m 18s
Build wheelhouse and smoke tests (windows-latest, 3.7)	4m 16s
Build wheelhouse and smoke tests (windows-latest, 3.8)	3m 55s
Build wheelhouse and smoke tests (windows-latest, 3.9)	4m 15s
Build wheelhouse and smoke tests (windows-latest, 3.10)	4m 12s
Build wheelhouse and smoke tests (windows-latest, 3.11)	4m 15s
Documentation build without examples	2m 29s
Documentation build with examples	0s
Testing and coverage (Windows)	17m 5s
Testing solvers and coverage (Linux)	1s
Testing and coverage (Linux)	1s
Testing IronPython and coverage (Windows)	1m 24s
Testing solvers and coverage (Windows)	15m 43s
Package library	1s
Release project	1s
Upload release documentation	1s
Deploy stable docs index	1s
	1h 12m 17s

Provide feedback