Martin Sand Christensen <[EMAIL PROTECTED]> wrote:
>>>>>> "Duncan" == Duncan Booth <[EMAIL PROTECTED]> writes:
> [...]
> Duncan> Now try:
> Duncan>
> Duncan> for command in getCommandsFromUser():
> Duncan> print "the result of that command was",
> execute(command) Duncan>
> Duncan> where getCommandsFromUser is a greedy generator that reads
> from stdin, Duncan> and see why generators don't work that way.
>
> I don't see a problem unless the generator isn't defined where it's
> going to be used. In other similar input bound use cases, such as the
> generator iterating over a query result set in my original post, I see
> even less of a problem. Maybe I'm simply daft and you need to spell it
> out for me. :-)
It does this:
>>> @greedy
def getCommandsFromUser():
while True:
yield raw_input('Command?')
>>> for cmd in getCommandsFromUser():
print "that was command", cmd
Command?hello
Command?goodbye
that was command hello
Command?wtf
that was command goodbye
Command?
Traceback (most recent call last):
File "<pyshell#56>", line 1, in <module>
for cmd in getCommandsFromUser():
File "<pyshell#42>", line 11, in delayed
for value in it:
File "<pyshell#53>", line 4, in getCommandsFromUser
yield raw_input('Command?')
KeyboardInterrupt
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