On 5/5/2016 7:57 PM, Stephen Hansen wrote:
On Thu, May 5, 2016, at 07:46 PM, Dan Sommers wrote:
On Thu, 05 May 2016 18:37:11 -0700, Stephen Hansen wrote:
''.join(x for x in string if x.isupper())
The difference is, both filter and your list comprehension *build a
list* which is not needed, and wasteful. The above skips building a
list, instead returning a generator ...
filter used to build a list, but now it doesn't (where "used to" means
Python 2.7 and "now" means Python 3.5; I'm too lazy to track down the
exact point(s) at which it changed):
Oh, didn't know that. Then again the OP was converting the output of
filter *into* a list, which wasted a list either way.
My line of code was something I copied off the Internet and modified it
until it did I exactly what I wanted it to do. That means that the many
Python 2 code examples available on the Internet are using a redundant
list operation with Python 3. Isn't that a "smell" that pylint should
pick up on?
Thank you,
Chris R.
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