Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Peter Otten
jlada...@itu.edu wrote: > On Friday, September 28, 2018 at 11:03:17 AM UTC-7, Chris Green wrote: >> I have a list created by:- >> >> fld = shlex.split(ln) >> >> It may contain 3, 4 or 5 entries according to data read into ln. >> What's the neatest way of setting the fourth and fifth entries

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Chris Green
Thanks all, several possible ways of doing it there. -- Chris Green ยท -- https://mail.python.org/mailman/listinfo/python-list

Re: JPEGImage() hangs

2018-09-29 Thread Chris Green
Cameron Simpson wrote: > On 28Sep2018 20:12, Chris Green wrote: > >Peter Pearson wrote: > >> On Fri, 28 Sep 2018 15:01:41 +0100, Chris Green wrote: > >> > Chris Green wrote: > >> >> Brian Oney wrote: > >> >> > Could you please try another tool like `convert'? E.g. > >> >> > > >> >> > $ conver

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Ben Finney
Ben Finney writes: > You can use a comprehension, iterating over the full range of index you > want:: > > words = shlex.split(line) > padding_length = 5 > words_padded = [ > (words[index] if index < len(words)) > for index in range(padding_length)] That omits the impo

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Peter Otten
Ben Finney wrote: > Ben Finney writes: > >> You can use a comprehension, iterating over the full range of index you >> want:: >> >> words = shlex.split(line) >> padding_length = 5 >> words_padded = [ >> (words[index] if index < len(words)) >> for index in range(paddin

Re: I am not able to run Python in Powershell

2018-09-29 Thread Calvin Spealman
Did you actually confirm the PATH variable contains the right path? echo $env:Path And look for a path entry that mentions Python. Then, make sure you can actually find python.exe in that location. As long as you keep the PATH option checked with the Python installer it absolutely should wor

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Dan Sommers
On 9/28/18 2:00 PM, Chris Green wrote: I have a list created by:- fld = shlex.split(ln) It may contain 3, 4 or 5 entries according to data read into ln. What's the neatest way of setting the fourth and fifth entries to an empty string if they don't (yet) exist? Using 'if len(fld) < 4:' fee

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Alister via Python-list
On Fri, 28 Sep 2018 19:00:29 +0100, Chris Green wrote: > I have a list created by:- > > fld = shlex.split(ln) > > It may contain 3, 4 or 5 entries according to data read into ln. What's > the neatest way of setting the fourth and fifth entries to an empty > string if they don't (yet) exist?

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Chris Angelico
On Sat, Sep 29, 2018 at 12:21 PM Chris Green wrote: > > I have a list created by:- > > fld = shlex.split(ln) > > It may contain 3, 4 or 5 entries according to data read into ln. > What's the neatest way of setting the fourth and fifth entries to an > empty string if they don't (yet) exist? Usi

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Glen D souza
fld = [ ] data = shlex.split(ln) for item in data: fld.append(item) fld = fld + [0] * (5 - len(data)) On Sat, 29 Sep 2018 at 11:03, Glen D souza wrote: > i have a approach, it may not be best > > fld = [ ] > for data in shlex.split(ln): >fld.append(data) > > > > On Sat, 29 Sep 20

Re: What's an elegant way to test for list index existing?

2018-09-29 Thread Glen D souza
i have a approach, it may not be best fld = [ ] for data in shlex.split(ln): fld.append(data) On Sat, 29 Sep 2018 at 07:52, wrote: > On Friday, September 28, 2018 at 11:03:17 AM UTC-7, Chris Green wrote: > > I have a list created by:- > > > > fld = shlex.split(ln) > > > > It may co