Hello all, My python runs and crashes after another run. I am getting errors like Microsoft Visual C++ Runtime Library
program c:\Python27\pythonw.exe This application has requested the Runtime to terminate it in an usuak way. Please contact the application's support team for more information. Any Idea ? my plot also does not work ? frustrating On Mon, Nov 28, 2011 at 12:32 PM, Ian Kelly <ian.g.ke...@gmail.com> wrote: > On Sun, Nov 27, 2011 at 4:55 PM, Steven D'Aprano > <steve+comp.lang.pyt...@pearwood.info> wrote: > >> My language combines generators and collection initializers, instead of > >> creating a whole new syntax for comprehensions. > >> > >> [| for i in 0..10: for j in 0.10: yield return i * j |] > > > > Are we supposed to intuit what that means? > > > > Is | a token, or are the delimiters [| and |] ? > > > > Is there a difference between iterating over 0..10 and iterating over > > what looks like a float 0.10? > > > > What is "yield return"? > > I would assume that "yield return" is borrowed from C#, where it is > basically equivalent to Python's yield statement. The advantage of > using two keywords like that is that you can compare the statements > "yield return foo" and "yield break", which is a bit clearer than > comparing the equivalent "yield foo" and "return". > > Having to type out "yield return" in every comprehension seems a bit > painful to me, but I can understand the approach: what is shown above > is a full generator, not a single "generator expression" like we use > in Python, so the statement keywords can't be omitted. It's trading > off convenience for expressiveness (a bad trade-off IMO -- complex > generators should be named, not anonymous). > > >> Lambdas and functions are the same thing in my language, so no need for > >> a special keyword. > > > > That does not follow. Lambdas and def functions are the same thing in > > Python, but Python requires a special keyword. > > I think the implication is that Unit has only one syntax for creating > functions, which is lambda-style. In any case, why does Python > require a special keyword? def is only used in a statement context, > and lambda is only used in an expression context. Why not use the > same keyword for both? I think the answer is historical: def came > first, and when anonymous functions were added it didn't make sense to > use the keyword "def" for them, because "def" implies a name being > defined. > > Cheers, > Ian > -- > http://mail.python.org/mailman/listinfo/python-list >
-- http://mail.python.org/mailman/listinfo/python-list
