Message 307051 - Python tracker (original) (raw)

Note that the DeprecationWarning exception is replaced with a SyntaxError to get a more accurate error report.

$ cat yield-gen.py def f(): return ((yield x) for x in range(3))

$ ./python -Wd yield-gen.py yield-gen.py:2: DeprecationWarning: 'yield' inside generator expression return ((yield x) for x in range(3))

$ ./python -We yield-gen.py File "yield-gen.py", line 2 return ((yield x) for x in range(3)) ^ SyntaxError: 'yield' inside generator expression

Without this replacement the result would be:

$ ./python -We yield-gen.py DeprecationWarning: 'yield' inside generator expression