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bpo-40067: Improve error messages for multiple star expressions in assignments (GH-19168) 

Co-Authored-By: Batuhan Taşkaya <isidentical@gmail.com>
Co-Authored-By: Pablo Galindo <Pablogsal@gmail.com>
This commit is contained in:
Furkan Önder 2020-03-26 04:54:31 +03:00 committed by GitHub
parent 5c3cda0d1a
commit cb6534e1a8
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4 changed files with 11 additions and 3 deletions
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9
Lib/test/test_unpack_ex.py
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@ -308,12 +308,17 @@ Now some general starred expressions (all fail).
>>> a, *b, c, *d, e = range(10) # doctest:+ELLIPSIS >>> a, *b, c, *d, e = range(10) # doctest:+ELLIPSIS
Traceback (most recent call last): Traceback (most recent call last):
... ...
SyntaxError: two starred expressions in assignment SyntaxError: multiple starred expressions in assignment
>>> [*b, *c] = range(10) # doctest:+ELLIPSIS >>> [*b, *c] = range(10) # doctest:+ELLIPSIS
Traceback (most recent call last): Traceback (most recent call last):
... ...
SyntaxError: two starred expressions in assignment SyntaxError: multiple starred expressions in assignment
>>> a,*b,*c,*d = range(4) # doctest:+ELLIPSIS
Traceback (most recent call last):
...
SyntaxError: multiple starred expressions in assignment
>>> *a = range(10) # doctest:+ELLIPSIS >>> *a = range(10) # doctest:+ELLIPSIS
Traceback (most recent call last): Traceback (most recent call last):

1
Misc/ACKS
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@ -1236,6 +1236,7 @@ Jeffrey Ollie
Adam Olsen Adam Olsen
Bryan Olson Bryan Olson
Grant Olson Grant Olson
Furkan Onder
Koray Oner Koray Oner
Piet van Oostrum Piet van Oostrum
Tomas Oppelstrup Tomas Oppelstrup

2
Misc/NEWS.d/next/Core and Builtins/2020-03-25-20-34-01.bpo-40067.0bFda2.rst Normal file
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@ -0,0 +1,2 @@
Improve the error message for multiple star expressions in an assignment.
Patch by Furkan Onder

2
Python/compile.c
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@ -3708,7 +3708,7 @@ assignment_helper(struct compiler *c, asdl_seq *elts)
} }
else if (elt->kind == Starred_kind) { else if (elt->kind == Starred_kind) {
return compiler_error(c, return compiler_error(c,
"two starred expressions in assignment"); "multiple starred expressions in assignment");
} }
} }
if (!seen_star) { if (!seen_star) {