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bpo-41546: make pprint (like print) not write to stdout when it is None #26810

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Merged
iritkatriel merged 7 commits into from
Jul 19, 2021
Merged

bpo-41546: make pprint (like print) not write to stdout when it is None #26810

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69741ec
bpo-41546: pprint (like print) does not write to stdout when it is None
iritkatriel Jun 20, 2021
793fba5
📜🤖 Added by blurb_it.
blurb-it[bot] Jun 20, 2021
214fb4f
skip formatting altogether if stdout is None
iritkatriel Jun 20, 2021
be4404e
edit news
iritkatriel Jul 2, 2021
db4e471
Remove redundant test
iritkatriel Jul 3, 2021
62af033
mention the change in the docs. Remove repetition of version directiv…
iritkatriel Jul 3, 2021
fba7e43
Update Doc/library/pprint.rst to add backticks around None
iritkatriel Jul 18, 2021
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skip formatting altogether if stdout is None
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@iritkatriel
iritkatriel committed Jul 3, 2021
commit 214fb4fbc6ad8d1b6a8fc4a027c42baf4f333d24
12 changes: 4 additions & 8 deletions Lib/pprint.py
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Original file line number Diff line number Diff line change
Expand Up @@ -141,20 +141,16 @@ def __init__(self, indent=1, width=80, depth=None, stream=None, *,
self._width = width
if stream is not None:
self._stream = stream
elif _sys.stdout is not None:
self._stream = _sys.stdout
else:
class _NullStdout:
def write(self, s):
return 0
self._stream = _NullStdout()
self._stream = _sys.stdout
self._compact = bool(compact)
self._sort_dicts = sort_dicts
self._underscore_numbers = underscore_numbers

def pprint(self, object):
self._format(object, self._stream, 0, 0, {}, 0)
self._stream.write("\n")
if self._stream is not None:
self._format(object, self._stream, 0, 0, {}, 0)
self._stream.write("\n")

def pformat(self, object):
sio = _StringIO()
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5 changes: 4 additions & 1 deletion Lib/test/test_pprint.py
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Expand Up @@ -162,7 +162,10 @@ def test_basic(self):

def test_stdout_is_None(self):
with contextlib.redirect_stdout(None):
pprint.pprint('this should not fail')
# smoke test - there is no output to check
value = 'this should not fail'
pprint.pprint(value)
pprint.PrettyPrinter().pprint(value)

def test_knotted(self):
# Verify .isrecursive() and .isreadable() w/ recursion
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