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EHN: handle frozenset in pprint #60828

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Merged
merged 5 commits into from
Feb 5, 2025
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EHN: handle frozenset in pprint #60828

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3f240fc
Add test
quangngd Feb 2, 2025
ca3751e
handle frozenset
quangngd Feb 2, 2025
65a9420
add whatsnew
quangngd Feb 4, 2025
168cbe4
Update doc/source/whatsnew/v3.0.0.rst
quangngd Feb 5, 2025
a541312
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Feb 5, 2025
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2 changes: 2 additions & 0 deletions pandas/io/formats/printing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,8 @@ def _pprint_seq(
"""
if isinstance(seq, set):
fmt = "{{{body}}}"
elif isinstance(seq, frozenset):
fmt = "frozenset({body})"
else:
fmt = "[{body}]" if hasattr(seq, "__setitem__") else "({body})"

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3 changes: 3 additions & 0 deletions pandas/tests/io/formats/test_printing.py
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Expand Up @@ -82,6 +82,9 @@ def test_repr_dict(self):
def test_repr_mapping(self):
assert printing.pprint_thing(MyMapping()) == "{'a': 4, 'b': 4}"

def test_repr_frozenset(self):
assert printing.pprint_thing(frozenset([1, 2])) == "frozenset(1, 2)"
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@wjandrea wjandrea Feb 6, 2025 •
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The output should have braces: frozenset({1, 2})

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@wjandrea wjandrea Feb 6, 2025

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I opened #60867



class TestFormatBase:
def test_adjoin(self):
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