Re: [Q] ipython: Multiple commands on the same line and newlines
Terry Reedy wrote: You can write multiple *simple* statements using ';'. All compound statements, like while, must start on own line. E.g. I want: x = 0;ctrl-enter This is one statement while x 10:ctrl-enter x = x + 1;ctrl-enter Lutz has a very nice write-up entitled Why Indentation Syntax? Lutz, Mark, Learning Python: Powerful Object Oriented Programming, 4th ed, (Sebastopol: O'Reilly, 2009), 266 -271. He makes the point clear that only simple statements may be chained together on a single line with ; and that compound statements (like while) must still appear on lines of their own (Lutz, 269). It might be nice (as an option) to be able to disengage the forced indentation syntax rules of Python. In other words, provide indentation syntax by default and allow an option via environment variable to engage an alternate (more C-like) blocking syntax. The forced indentation syntax is great for readability (and frankly, I like the appearance /low clutter) but it is inconvenient in some situations, like the one at the top of the thread. Just an idea (probably already been beaten to death long before my time) :) kind regards, m harris -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
On Mon, Apr 18, 2011 at 4:01 PM, harrismh777 harrismh...@charter.net wrote: It might be nice (as an option) to be able to disengage the forced indentation syntax rules of Python. In other words, provide indentation syntax by default and allow an option via environment variable to engage an alternate (more C-like) blocking syntax. You can do that with a future directive. from __future__ import braces That's two underscores before and after the word future. http://docs.python.org/reference/simple_stmts.html#future-statements Chris Angelico -- http://mail.python.org/mailman/listinfo/python-list
Re: ipython: Multiple commands on the same line and newlines
Phil Winder philipwin...@gmail.com writes: Yes, that does not produce an error, but it does not work. Please refer to my first post. Try the first code, you will get a syntax error. Placing things on one line makes for easy history scrollback. In your version you will have 2 lines of history for the x = 0 term and the while ... term. I don't want to have to press up twice, especially when the code was in the distant past! Also cpaste might be ok for scripting, but it looks too clumsy to use at the command line. Cheers, Phil Well I guess that's the way it is with the interpreter.. But I don't see the sense in doing everything from there, just write the code to a file and use %edit from ipython to change and run it, it's quite nice and easy too. -- http://mail.python.org/mailman/listinfo/python-list
Re: ipython: Multiple commands on the same line and newlines
On Apr 17, 1:11 pm, Andrea Crotti andrea.crott...@gmail.com wrote: Phil Winder philipwin...@gmail.com writes: Yes, that does not produce an error, but it does not work. Please refer to my first post. Try the first code, you will get a syntax error. Placing things on one line makes for easy history scrollback. In your version you will have 2 lines of history for the x = 0 term and the while ... term. I don't want to have to press up twice, especially when the code was in the distant past! Also cpaste might be ok for scripting, but it looks too clumsy to use at the command line. Cheers, Phil Well I guess that's the way it is with the interpreter.. But I don't see the sense in doing everything from there, just write the code to a file and use %edit from ipython to change and run it, it's quite nice and easy too. Ok, thanks all. It's a little disappointing, but I guess that you always have to work in a different way when you move to a new language. Andrea's %edit method is probably the best compromise, but this now means that I will have to learn all the (obscure) shortcuts for vi! Cheers, Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: ipython: Multiple commands on the same line and newlines
On 17.04.2011 20:40, Phil Winder wrote: Ok, thanks all. It's a little disappointing, but I guess that you always have to work in a different way when you move to a new language. Andrea's %edit method is probably the best compromise, but this now means that I will have to learn all the (obscure) shortcuts for vi! As you can read in Python IDE/text-editor thread. Learning either Vim or Emacs will pay off in the long run, Anyway, IPython honors the $EDITOR environment variable. Just set it to whatever editor you prefer. -- http://mail.python.org/mailman/listinfo/python-list
Re: ipython: Multiple commands on the same line and newlines
Phil,
there is one more way you can run all commands as in linux shell..
import commands
s, o = commands.getstatusoutput('x=10;for i in $(seq $x); do echo $i ;
done')
print o
1
2
3
4
5
6
7
8
9
10
On Sun, Apr 17, 2011 at 11:40 AM, Phil Winder philipwin...@gmail.comwrote:
On Apr 17, 1:11 pm, Andrea Crotti andrea.crott...@gmail.com wrote:
Phil Winder philipwin...@gmail.com writes:
Yes, that does not produce an error, but it does not work. Please
refer to my first post. Try the first code, you will get a syntax
error. Placing things on one line makes for easy history scrollback.
In your version you will have 2 lines of history for the x = 0 term
and the while ... term. I don't want to have to press up twice,
especially when the code was in the distant past! Also cpaste might be
ok for scripting, but it looks too clumsy to use at the command line.
Cheers,
Phil
Well I guess that's the way it is with the interpreter..
But I don't see the sense in doing everything from there, just write the
code to a file and use %edit from ipython to change and run it, it's
quite nice and easy too.
Ok, thanks all. It's a little disappointing, but I guess that you
always have to work in a different way when you move to a new
language. Andrea's %edit method is probably the best compromise, but
this now means that I will have to learn all the (obscure) shortcuts
for vi!
Cheers,
Phil
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
[Q] ipython: Multiple commands on the same line and newlines
Hi, I'm having a go at using ipython as a command prompt for data analysis. Coming from Matlab, I'm used to typing multiple commands on the same line then using the up arrow to go through my history. How can I write multiple python commands on the same line? E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. Also, how can I produce a new line, without it running the command? I would have expected a ctrl-enter or shift-enter to produce the expected results. E.g. I want: x = 0; ctrl-enter while x 10: ctrl-enter x = x + 1; ctrl-enter enter to run It seems to work automatically for the while xxx:, but combinations of keys+enter do not work for normal lines. Cheers, Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
Phil Winder philipwin...@gmail.com writes: Hi, I'm having a go at using ipython as a command prompt for data analysis. Coming from Matlab, I'm used to typing multiple commands on the same line then using the up arrow to go through my history. How can I write multiple python commands on the same line? E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. Also, how can I produce a new line, without it running the command? I would have expected a ctrl-enter or shift-enter to produce the expected results. E.g. I want: x = 0; ctrl-enter while x 10: ctrl-enter x = x + 1; ctrl-enter enter to run It seems to work automatically for the while xxx:, but combinations of keys+enter do not work for normal lines. Cheers, Phil Well when you do something like while x 10: it doesn't execute anything, but goes to newline and waits for the rest. for x = 10 what's the difference for you if it gets evaluated before or after? Anyway you can you also %cpaste if you want to write more code Anyway to me this works perfectly: In [1]: x = 0 In [2]: while x 10: print x; x += 1 ...: 0 1 2 3 4 5 6 7 8 9 -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
On Sun, Apr 17, 2011 at 2:29 AM, Andrea Crotti andrea.crott...@gmail.com wrote: for x = 10 what's the difference for you if it gets evaluated before or after? I have the same issue in IDLE sometimes, and the reason it's annoying relates to the up-arrow key (Alt-P in IDLE). I can retrieve one entire command, but if that command requires a prefix statement to set things up (like initializing a dictionary to empty), that has to be separate. Chris Angelico -- http://mail.python.org/mailman/listinfo/python-list
Re: ipython: Multiple commands on the same line and newlines
On Apr 16, 5:29 pm, Andrea Crotti andrea.crott...@gmail.com wrote: Phil Winder philipwin...@gmail.com writes: Hi, I'm having a go at using ipython as a command prompt for data analysis. Coming from Matlab, I'm used to typing multiple commands on the same line then using the up arrow to go through my history. How can I write multiple python commands on the same line? E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. Also, how can I produce a new line, without it running the command? I would have expected a ctrl-enter or shift-enter to produce the expected results. E.g. I want: x = 0; ctrl-enter while x 10: ctrl-enter x = x + 1; ctrl-enter enter to run It seems to work automatically for the while xxx:, but combinations of keys+enter do not work for normal lines. Cheers, Phil Well when you do something like while x 10: it doesn't execute anything, but goes to newline and waits for the rest. for x = 10 what's the difference for you if it gets evaluated before or after? Anyway you can you also %cpaste if you want to write more code Anyway to me this works perfectly: In [1]: x = 0 In [2]: while x 10: print x; x += 1 ...: 0 1 2 3 4 5 6 7 8 9 Yes, that does not produce an error, but it does not work. Please refer to my first post. Try the first code, you will get a syntax error. Placing things on one line makes for easy history scrollback. In your version you will have 2 lines of history for the x = 0 term and the while ... term. I don't want to have to press up twice, especially when the code was in the distant past! Also cpaste might be ok for scripting, but it looks too clumsy to use at the command line. Cheers, Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
On 4/16/2011 9:55 AM, Phil Winder wrote: Hi, I'm having a go at using ipython as a command prompt for data analysis. Coming from Matlab, I'm used to typing multiple commands on the same line then using the up arrow to go through my history. How can I write multiple python commands on the same line? You can write multiple *simple* statements using ';'. E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. All compound statements, like while, must start on own line. Also, how can I produce a new line, without it running the command? Use an editor, as with IDLE, rather than a shell. Interactive mode runs *1* statement (including simple;simple) at a time. would have expected a ctrl-enter or shift-enter to produce the expected results. E.g. I want: x = 0;ctrl-enter This is one statement while x 10:ctrl-enter x = x + 1;ctrl-enter This is another. I can understanding wanting to rerun initialized loops with one enter, but you cannot. Sorry. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
Hi Phil... How can I write multiple python commands on the same line? E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. I don`t think this is possible under any Python version. There will always be some kind of user intervention required other than just the single 1, (one), RETURN/ENTER E.G... x = 0RETURN/ENTER while x 10: print x; x = x + 1RETURN/ENTER ...RETURN/ENTER 0 1 2 3 4 5 6 7 8 9 FLASHING_CURSOR Ending up with two, (2), lines and three, (3), RETURN/ENTER I hope some one can prove me wrong because I would love single line ability sometimes. -- 73... Bazza, G0LCU... Team AMIGA... http://homepages.tesco.net/wisecracker/ http://main.aminet.net/search?readme=wisecracker http://mikeos.berlios.de/ -- http://mail.python.org/mailman/listinfo/python-list
Re: [Q] ipython: Multiple commands on the same line and newlines
Phil Winder wrote: Hi, I'm having a go at using ipython as a command prompt for data analysis. Coming from Matlab, I'm used to typing multiple commands on the same line then using the up arrow to go through my history. How can I write multiple python commands on the same line? E.g. x = 0; while x 10: x = x + 1; returns an invalid syntax error on the 'e' in while. Also, how can I produce a new line, without it running the command? I would have expected a ctrl-enter or shift-enter to produce the expected results. E.g. I want: x = 0; ctrl-enter while x 10: ctrl-enter x = x + 1; ctrl-enter enter to run It seems to work automatically for the while xxx:, but combinations of keys+enter do not work for normal lines. You might want to take a look at DreamPie ( http://dreampie.sourceforge.net/ ), which provides the second option you indicate (and thus makesthe first unnecessary). I've found it quite convenient for interactive use. -- --OKB (not okblacke) Brendan Barnwell Do not follow where the path may lead. Go, instead, where there is no path, and leave a trail. --author unknown -- http://mail.python.org/mailman/listinfo/python-list
