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Use warnings.warn, not logging.warning, in microseconds locator warning. by anntzer · Pull Request #15000 · matplotlib/matplotlib · GitHub

  1. matplotlib
  2. matplotlib

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Use warnings.warn, not logging.warning, in microseconds locator warning. #15000

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Merged
timhoffm merged 1 commit into from
Aug 7, 2019
Conversation 1 Commits 1 Checks 0 Files changed
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Use warnings.warn, not logging.warning, in microseconds locator warning. #15000

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7 changes: 4 additions & 3 deletions lib/matplotlib/dates.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1457,9 +1457,10 @@ def get_locator(self, dmin, dmax):
else:
locator = MicrosecondLocator(interval, tz=self.tz)
if dmin.year > 20 and interval < 1000:
_log.warning('Plotting microsecond time intervals is not well '
'supported. Please see the MicrosecondLocator '
'documentation for details.')
cbook._warn_external(
'Plotting microsecond time intervals is not well '
'supported; please see the MicrosecondLocator '
'documentation for details.')

locator.set_axis(self.axis)

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12 changes: 10 additions & 2 deletions lib/matplotlib/tests/test_dates.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,8 @@
import datetime
try:
from contextlib import nullcontext
except ImportError:
from contextlib import ExitStack as nullcontext # Py 3.6.

import dateutil.tz
import dateutil.rrule
Expand Down Expand Up @@ -369,7 +373,9 @@ def _create_auto_date_locator(date1, date2):
for t_delta, expected in results:
d2 = d1 + t_delta
locator = _create_auto_date_locator(d1, d2)
assert list(map(str, mdates.num2date(locator()))) == expected
with (pytest.warns(UserWarning) if t_delta.microseconds
else nullcontext()):
assert list(map(str, mdates.num2date(locator()))) == expected


def test_auto_date_locator_intmult():
Expand Down Expand Up @@ -444,7 +450,9 @@ def _create_auto_date_locator(date1, date2):
for t_delta, expected in results:
d2 = d1 + t_delta
locator = _create_auto_date_locator(d1, d2)
assert list(map(str, mdates.num2date(locator()))) == expected
with (pytest.warns(UserWarning) if t_delta.microseconds
else nullcontext()):
assert list(map(str, mdates.num2date(locator()))) == expected


def test_concise_formatter():
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