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better error message for TypeError on datetime parsing #766

merged 3 commits into from Aug 21, 2019


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samuelcolvin commented Aug 18, 2019

Change Summary

While working on #763 I discovered that we had no tests and ugly errors if anything other than a native datetime/date/time/timedelta, string, int or float was passed to those parsers.


  • fix the above - more descriptive error message
  • add support for bytes by decoding them before regex matching
  • change invalid values to be value_errors not type_errors - more correct.

Github doesn't do a very good job of showing it, but this change is mainly just an indentation change plus adding if isinstance(value, bytes): value = value.decode().


  • Unit tests for the changes exist
  • Tests pass on CI and coverage remains at 100%
  • Documentation reflects the changes where applicable
  • changes/<pull request or issue id>-<github username>.rst file added describing change
    (see changes/ for details)

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codecov bot commented Aug 21, 2019

Codecov Report

Merging #766 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #766   +/-   ##
  Coverage     100%   100%           
  Files          15     15           
  Lines        2734   2747   +13     
  Branches      541    546    +5     
+ Hits         2734   2747   +13
Impacted Files Coverage Δ
pydantic/ 100% <100%> (ø) ⬆️
pydantic/ 100% <100%> (ø) ⬆️

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@samuelcolvin samuelcolvin merged commit 9dee83a into master Aug 21, 2019
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@samuelcolvin samuelcolvin deleted the datetime-type-errors branch Aug 21, 2019
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