Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

gh-130959: Reject whitespace in fractions, in pure Python fromisoformat() #130962

Open
wants to merge 5 commits into
base: main
Choose a base branch
from
Open

gh-130959: Reject whitespace in fractions, in pure Python fromisoformat() #130962

Show file tree
Hide file tree
Changes from 3 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
bfbc3b9
gh-130959: Reject whitespace in fractions, in pure Python `fromisofor…
mgorny Mar 7, 2025
86abd94
Add the news entry
mgorny Mar 7, 2025
0ea0ae1
Use a different example to fix Sphinx lint
mgorny Mar 7, 2025
1a98d89
Apply suggestions from code review
mgorny Mar 8, 2025
4d444be
Try fixing `:func:` ref.
mgorny Mar 8, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 2 additions & 3 deletions Lib/_pydatetime.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -436,6 +436,8 @@ def _parse_hh_mm_ss_ff(tstr):
raise ValueError("Invalid microsecond separator")
else:
pos += 1
if not all(map(_is_ascii_digit, tstr[pos:])):
raise ValueError("Non-digit values in fraction")

len_remainder = len_str - pos

Expand All @@ -447,9 +449,6 @@ def _parse_hh_mm_ss_ff(tstr):
time_comps[3] = int(tstr[pos:(pos+to_parse)])
if to_parse < 6:
time_comps[3] *= _FRACTION_CORRECTION[to_parse-1]
if (len_remainder > to_parse
and not all(map(_is_ascii_digit, tstr[(pos+to_parse):]))):
raise ValueError("Non-digit values in unparsed fraction")

return time_comps

Expand Down
6 changes: 6 additions & 0 deletions Lib/test/datetimetester.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3556,6 +3556,9 @@ def test_fromisoformat_fails_datetime(self):
'9999-12-31T24:00:00.000000', # Year is invalid after wrapping due to 24:00
'2009-04-19T12:30Z12:00', # Extra time zone info after Z
'2009-04-19T12:30:45:334034', # Invalid microsecond separator
'2009-04-19T12:30:45.400 +02:30', # Space between ms and timezone (gh-130959)
'2009-04-19T12:30:45.400 ', # Trailing space (gh-130959)
'2009-04-19T12:30:45. 400', # Space before fraction (gh-130959)
]

for bad_str in bad_strs:
Expand Down Expand Up @@ -4773,6 +4776,9 @@ def test_fromisoformat_fails(self):
'12:30,5', # Decimal mark at end of minute
'12:30:45.123456Z12:00', # Extra time zone info after Z
'12:30:45:334034', # Invalid microsecond separator
'12:30:45.400 +02:30', # Space between ms and timezone (gh-130959)
'12:30:45.400 ', # Trailing space (gh-130959)
'12:30:45. 400', # Space before fraction (gh-130959)
]

for bad_str in bad_strs:
Expand Down
3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2025-03-07-19-24-27.gh-issue-130959.xO8vVS.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
Fix pure Python implementation of ``time.fromisoformat()`` to reject times
with spaces in fractional part (for example, ``12:34:56.400 +02:00``), matching
the C implementation.
Loading