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Update documentation on multiple calls of metafunc.parametrize

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Xuan Luong 2017-09-09 20:50:45 -04:00
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Add note in ``parametrize.rst`` about calling ``metafunc.parametrize`` multiple times.

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doc/en/parametrize.rst
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SKIP [1] test_strings.py:2: got empty parameter set ['stringinput'], function test_valid_string at $REGENDOC_TMPDIR/test_strings.py:1
1 skipped in 0.12 seconds
Note that when calling ``metafunc.parametrize`` multiple times with different parameter sets, all parameter names across
those sets cannot be duplicated, otherwise an error will be raised.
For further examples, you might want to look at :ref:`more
parametrization examples <paramexamples>`.