On 16.03.2016 11:47, Peter Otten wrote:
What would you expect?
A keyword filling the missing functionality? Some Python magic, I
haven't seen before. ;-)
class Empty(Exception): pass
...
def check_empty(items):
... items = iter(items)
... try:
... yield next(items)
... except StopIteration:
... raise Empty
... yield from items
...
try:
... for item in check_empty("abc"): print(item)
... except Empty: print("oops")
...
a
b
c
try:
... for item in check_empty(""): print(item)
... except Empty: print("oops")
...
oops
He will be highly delighted so see such a simplistic solution. ;-)
I'm kidding, of course. Keep it simple and use a flag like you would in any
other language:
empty = True:
for item in items:
empty = False
...
if empty:
...
He likes this approach. Thanks. :-)
Although, I for one would like a keyword. I remember having this issue
myself, and found that the "empty" variable approach is more like a
pattern. As usual, patterns are workarounds for features that a language
misses.
Best,
Sven
--
https://mail.python.org/mailman/listinfo/python-list
