Update ksource.py

[djps]

fixes #447

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 7.69231% with 24 lines in your changes missing coverage. Please review.

Project coverage is 71.87%. Comparing base (63055b4) to head (cbf9bdd). Report is 55 commits behind head on master.

Files with missing lines	Patch %	Lines
kwave/ksource.py	7.69%	24 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #449      +/-   ##
==========================================
+ Coverage   71.84%   71.87%   +0.03%     
==========================================
  Files          46       46              
  Lines        6744     6741       -3     
  Branches     1496     1495       -1     
==========================================
  Hits         4845     4845              
+ Misses       1333     1331       -2     
+ Partials      566      565       -1     

Flag	Coverage Δ
3.10	71.91% <7.69%> (-0.13%)	:arrow_down:
3.11	71.91% <7.69%> (-0.13%)	:arrow_down:
3.12	71.91% <7.69%> (-0.13%)	:arrow_down:
3.9	71.85% <7.69%> (+0.03%)	:arrow_up:
macos-latest	71.81% <7.69%> (+0.03%)	:arrow_up:
ubuntu-latest	71.84% <7.69%> (+0.03%)	:arrow_up:
windows-latest	71.85% <7.69%> (+0.03%)	:arrow_up:

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[djps]

Closed as will be covered by another PR.