+ Bia^RIt^RItRtR]/tRt!RR]P 4t]R8Xd]P!4R#R#)Nao Unpack tuple >>> t = (1, 2, 3) >>> a, b, c = t >>> a == 1 and b == 2 and c == 3 True Unpack list >>> l = [4, 5, 6] >>> a, b, c = l >>> a == 4 and b == 5 and c == 6 True Unpack dict >>> d = {4: 'four', 5: 'five', 6: 'six'} >>> a, b, c = d >>> a == 4 and b == 5 and c == 6 True Unpack implied tuple >>> a, b, c = 7, 8, 9 >>> a == 7 and b == 8 and c == 9 True Unpack string... fun! >>> a, b, c = 'one' >>> a == 'o' and b == 'n' and c == 'e' True Unpack generic sequence >>> class Seq: ... def __getitem__(self, i): ... if i >= 0 and i < 3: return i ... raise IndexError ... >>> a, b, c = Seq() >>> a == 0 and b == 1 and c == 2 True Single element unpacking, with extra syntax >>> st = (99,) >>> sl = [100] >>> a, = st >>> a 99 >>> b, = sl >>> b 100 Now for some failures Unpacking non-sequence >>> a, b, c = 7 Traceback (most recent call last): ... TypeError: cannot unpack non-iterable int object Unpacking tuple of wrong size >>> a, b = t Traceback (most recent call last): ... ValueError: too many values to unpack (expected 2, got 3) Unpacking tuple of wrong size >>> a, b = l Traceback (most recent call last): ... ValueError: too many values to unpack (expected 2, got 3) Unpacking sequence too short >>> a, b, c, d = Seq() Traceback (most recent call last): ... ValueError: not enough values to unpack (expected 4, got 3) Unpacking sequence too long >>> a, b = Seq() Traceback (most recent call last): ... ValueError: too many values to unpack (expected 2) Unpacking a sequence where the test for too long raises a different kind of error >>> class BozoError(Exception): ... pass ... >>> class BadSeq: ... def __getitem__(self, i): ... if i >= 0 and i < 3: ... return i ... elif i == 3: ... raise BozoError ... else: ... raise IndexError ... Trigger code while not expecting an IndexError (unpack sequence too long, wrong error) >>> a, b, c, d, e = BadSeq() Traceback (most recent call last): ... test.test_unpack.BozoError Trigger code while expecting an IndexError (unpack sequence too short, wrong error) >>> a, b, c = BadSeq() Traceback (most recent call last): ... test.test_unpack.BozoError Allow unpacking empty iterables >>> () = [] >>> [] = () >>> [] = [] >>> () = () Unpacking non-iterables should raise TypeError >>> () = 42 Traceback (most recent call last): ... TypeError: cannot unpack non-iterable int object Unpacking to an empty iterable should raise ValueError >>> () = [42] Traceback (most recent call last): ... ValueError: too many values to unpack (expected 0, got 1) Unpacking a larger iterable should raise ValuleError, but it should not entirely consume the iterable >>> it = iter(range(100)) >>> x, y, z = it Traceback (most recent call last): ... ValueError: too many values to unpack (expected 3) >>> next(it) 4 Unpacking unbalanced dict >>> d = {4: 'four', 5: 'five', 6: 'six', 7: 'seven'} >>> a, b, c = d Traceback (most recent call last): ... ValueError: too many values to unpack (expected 3, got 4) Ensure that custom `__len__()` is NOT called when showing the error message >>> class LengthTooLong: ... def __len__(self): ... return 5 ... def __getitem__(self, i): ... return i*2 ... >>> x, y, z = LengthTooLong() Traceback (most recent call last): ... ValueError: too many values to unpack (expected 3) For evil cases like these as well, no actual count to be shown >>> class BadLength: ... def __len__(self): ... return 1 ... def __getitem__(self, i): ... return i*2 ... >>> x, y, z = BadLength() Traceback (most recent call last): ... ValueError: too many values to unpack (expected 3) doctestscNVP\P!44V#)N)addTestdoctest DocTestSuite)loadertestspatterns&&&'/usr/lib/python3.14/test/test_unpack.py load_testsr s MM'&&() Lc&a]tRt^toRtRtVtR#)TestCornerCasescRpRV R2p/p\W#4VR,p\^4F&pV!\R44pVPVR4K( R#)(izdef unpack_400(x): z" = x return y unpack_400iNa"(y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,y,))execrange assertEqual)selftargetcodensr_ys& r test_extended_oparg_not_ignored/TestCornerCases.test_extended_oparg_not_ignoredsa% H   T % rA5:&A   Q $r N)__name__ __module__ __qualname____firstlineno__r__static_attributes____classdictcell__) __classdict__s@r rrs % %r r__main__) runittestr__test__r TestCaserrmainrr r r+sO B  " %h''%  z MMOr