Add default value for exports

[TheTripleV]

closes #128.

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Codecov Report

Merging #129 (cab7452) into master (d921af3) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #129   +/-   ##
=======================================
  Coverage   92.55%   92.55%           
=======================================
  Files           2        2           
  Lines         215      215           
=======================================
  Hits          199      199           
  Misses         16       16           

Flag	Coverage Δ
pytests	92.55% <ø> (ø)

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