increase readabillity in io_utils

[heckstrahler]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 41.66667% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.89%. Comparing base (d05edd3) to head (e057186).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
pandapower/io_utils.py	41.66%	14 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2770   +/-   ##
========================================
  Coverage    74.88%   74.89%           
========================================
  Files          315      315           
  Lines        36329    36327    -2     
========================================
  Hits         27206    27206           
+ Misses        9123     9121    -2     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud