In the main shell of IDLE, errors always return a line number but the development environment doesn't even have line numbers. Is there anyway to turn on line numbers?
Version 3.8 or newer:
To show line numbers in the current window, go to Options and click Show Line Numbers.
To show them automatically, go to Options > Configure IDLE > General and check the Show line numbers in new windows box.
Version 3.7 or older:
Unfortunately there is not an option to display line numbers in IDLE although there is an enhancement request open for this.
However, there are a couple of ways to work around this:
Under the edit menu there is a go to line option (there is a default shortcut of Alt+G for this).
There is a display at the bottom right which tells you your current line number / position on the line:
There's a set of useful extensions to IDLE called IDLEX that works with MacOS and Windows http://idlex.sourceforge.net/
It includes line numbering and I find it quite handy & free.
Otherwise there are a bunch of other IDEs some of which are free: https://wiki.python.org/moin/IntegratedDevelopmentEnvironments
If you are trying to track down which line caused an error, if you right-click in the Python shell where the line error is displayed it will come up with a "Go to file/line" which takes you directly to the line in question.
As it was mentioned by Davos you can use the IDLEX
It happens that I'm using Linux version and from all extensions I needed only LineNumbers. So I've downloaded IDLEX archive, took LineNumbers.py from it, copied it to Python's lib folder ( in my case its /usr/lib/python3.5/idlelib ) and added following lines to configuration file in my home folder which is
~/.idlerc/config-extensions.cfg:
[LineNumbers]
enable = 1
enable_shell = 0
visible = True
[LineNumbers_cfgBindings]
linenumbers-show =
Line numbers were added to the IDLE editor two days ago and will appear in the upcoming 3.8.0a3 and later 3.7.5. For new windows, they are off by default, but this can be reversed on the Setting dialog, General tab, Editor section. For existing windows, there is a new Show (Hide) Line Numbers entry on the Options menu. There is currently no hotkey. One can select a line or bloc of lines by clicking on a line or clicking and dragging.
Some people may have missed Edit / Go to Line. The right-click context menu Goto File/Line works on grep (Find in Files) output as well as on trackbacks.
As #StahlRat already answered. I would like to add another method for it. There is extension pack for Python Default idle editor Python Extensions Package.
As mentioned above (a quick way to do this) :
pip install IDLEX
Then I create a shortcut on Desktop (Win10) like this:
C:\Python\Python37\pythonw.exe "C:\Python\Python37\Scripts\idlex.pyw"
The paths may be different and need to be changed:
C:\Python\Python37
(Thanks for the great answers above)
Related
since yesterday PyCharm 2016.3 won't accept selected lines from the list of code completion:
If I hit enter, a new line will be set into the editor rather than the selected line of the popup window. Is there any setting for this behaviour? Until now I couldn't find anything.
I noticed on a few occasions the GUI going somehow off-rails, including in ways similar to the one described. I couldn't determine a pattern in the occurences. Just closing and re-opening the project didn't always help.
What worked pretty reliably for me in the end was exiting PyCharm (giving it ample time to finish), making sure no related java processes remains active (running on Linux, in some cases I had to manually kill such processes when it became clear they're not going away by themselves) and then re-starting the IDE.
I found the current keymap for code completion by chance. This is set via:
Settings > Keymap > Code > Completion > Basic
How do I enable indentation in Visual Studio Code?
I'm trying to learn Python (new to programming) and need auto-indentation. It worked with the first version I tried, but it doesn't indent after a colon (:) any more. How can I configure it to automatically indent?
You can install the Visual Studio Code Python extension which will provide intellisense, auto-completion, code formatting, and debugging.
Here is more information on the Python extension, here.
As said there is the Python extension which now do it out of the box, but still don't do a great job, and an example is when you copy and past a whole block into a function or so. It just indents the first line, and that's not a good behavior. Here are two good helpful solutions:
indent a whole block manually: select the whole block, and then click Tab. If you want to indent backward, you do it with Shift+Tab. That's it, and I think that can be useful in several places.
Python auto indent extension (https://marketplace.visualstudio.com/items?itemName=hyesun.py-paste-indent). It solves the problem when pasting. Just see how it works in the link. Now about setting it up: You need to set just one keybinding for the command "pyPasteIndent.pasteAndIndent" provided by the extension. Once done, you will have your own shortcut to paste and indent automatically (I have set it to Alt + P)
Here is how:
- Ctrl+SHIFT+P to open the command palette, then write "key"*, choose *"open keyboard shortcut", and then the keybinding page open, which it's the nice interface for the **keybindings.json. You can open keybindings.json the same way and by choosing "open keyboard shortcut file" (in place of just "open keyboard shortcut"). Give it a look if never have. But here I will go with the nice interface. Know also that you can open that going menu File → Preference → Keyboard Shortcut.
In the keybinding window, in the search bar, paste pyPasteIndent.pasteAndIndent, and then click the + button to add the shortcut and create the keybinding.
The image below shows well how it's done:
I installed this extension: Python Indent. It works very well.
Simple solution!
Click the tab size (may show "Spaces: 4") in the bottom right corner and choose Convert Indentation to Tabs or Convert Indentation to Spaces as per your requirement.
I faced similar issues while editing. Select the lines of code you wish to intend and press Ctrl + ] in Windows or CMD+] on Mac.
You can change the indent size in settings. Search for tab size in settings. I use two, by the way.
I faced similar issues switching from PyCharm. The Python Indent extension, which is available in the Visual Studio Code marketplace, works perfectly fine for me.
For me, "Convert Indentation to Tabs" has worked.
To do that:
Go to "Command Palette" Ctrl+Shift+P (View>Command Palette)
Type in & select "Convert Indentation to Tabs" and press Enter
Is there a way to copy text out of Python IDLE on a Mac? When I highlight text and copy then past into a text editor, I get the same text pasted. It is some of the first text I start with in IDLE. None of the other text will copy out.
From The Things I Hate About IDLE That I Wish Someone Would Fix (from 2011):
1.2) NEW FEATURE: Auto-Copy-On-Highlight
Once we get rid of being able to move the cursor off the last line, that opens a new opportunity to implement an automatic copy-on-highlight feature that many terminal and IRC client programs implement. Since this text is read-only, the only reason a person has for highlighting it is to copy it (they can’t delete it.) As soon as the user highlights text in the shell window, it is copied to the clipboard.
Looks like the best you can do is save as a .py file. Open that in a text editor and continue working in IDLE. With each save, the text editor will refresh with all updates, including errors. At least TextWrangler will.
Sometimes in things like a linux terminal you can't do a normal copy and paste, try holding Command/Control + Shift + C after highlighting things and seeing if that works, since you're on mac i'm not sure if it would be the Command or Control key so try both
EDIT: There is an apple discussion about the exact same thing. They discuss going into the options menu, then into configuration and navigating to the keys section. Then you use a built in key-set, their suggestion is using IDLE Classic Mac.
I cannot tell from your description exactly what you did and what happened. But I can recommend that you upgrade to 3.4.4 or 3.5.1 (or 2.7.11 for 2.7 users). Among other improvements, they all contain a patch to make right-click for context menu work on Mac Aqua. This was issue 24801 on the CPython bug tracker.
If there is still an actual problem on Mac, I would like to know so it can be fixed.
I'm coming to PyCharm from Eclipse, and something that is annoying me is how I switch between open files in the editor.
In Eclipse, I had a hotkey set up to open the previous editor. A menu would appear with the files in order of most-to-least recently viewed. If I hit the key once quickly, it would switch to the last file viewed. Whatever I had been working on recently would always be readily available.
In PyCharm, the files are listed in the editor in seemingly random order. Control+left (or right) takes you to the next file in the listing, which may be near a file unrelated in any way. I can use the mouse to select a file, but I'm not used to this, and it makes me stop and think about what the file name was, what module it was in, etc.
Natural, quick, efficient, minimum of thought -- this is what I'm looking for in navigating between open files in the PyCharm editor. Does anyone know of a way I can achieve this?
Thanks!
Ctrl-Tab switches in most-recently-used order (like Alt-Tab for the desktop). Ctrl-E will show recent files.
You should look at Help > Default Keymap Reference, under the navigation heading, for more helpful shortcuts.
I'm just starting out learning python with GEdit plus various plugins as my IDE.
Visual Studio/F# has a feature which permits the highlighting on a piece of text in the code window which then, on a keypress, gets executed in the F# console.
Is there a similar facility/plugin which would enable this sort of behaviour for GEdit/Python? I do have various execution type plugins (Run In Python,Better Python Console) but they don't give me this particular behaviour - or at least I'm not sure how to configure them to give me this. I find it useful because in learning python, I have some test code I want to execute particular individual lines or small segments of code (rather then a complete file) to try and understand what they are doing (and the copy/paste can get a bit tiresome)
... or perhaps there is a better way to do code exploration?
Many thx
Simon
Yes, you use "external tools plugin"
http://live.gnome.org/Gedit/ToolLauncherPlugin
As an example,
Edit > Preferences
Plugins
Tick "External Tools"
Close the Preferences Window
Tools > Manage External Tools
Click the "Add new too" icon in the bottom left
Name it "Execute Highlighted Python Code"
give it a keyboard shortcut
change the input combo box to : "highlighted selection"
change the output to : "Display in Bottom Pane"
In the editor window for the tool, replace everything with :
.
#!/usr/bin/env python
import sys
result = eval(sys.stdin.read())
print expression, "=>", result, type(result)
.
If you wish to see the result of entire .py file, you can put this code in your new created external tool window
#!/usr/bin/env python
import sys
exec(sys.stdin.read())
and change the Input to Current document.
For python, You can use "external tools plugin":
#!/bin/sh
python3 "$GEDIT_CURRENT_DOCUMENT_PATH"
Option of external tool:
Save: Current Document
Input: Current Document
Output: Display in bottom panel
Language: Python or Python3
Don't forget the quotes around $GEDIT_CURRENT_DOCUMENT_PATH....
To answer your second question, and hopefully guide you in a direction you'll be happier with, I think you ought to consider trying some different editors. There are many with more powerful code exploration features than GEdit has. Check out this post:
What IDE to use for Python?
I installed iPython console in gedit and do most of my simple scripting in it, but gedit is a very simple editor, so it'll not have some advance feature like an IDE
But if you want code exploring, or auto completion, I recommend a real IDE like Eclipse.
If you just want a editor, KomodoEdit is fine.
What I do is keep a file called python_temp.py. I have a shortcut to it in my dock. I use it as a scratch pad. Whenever I want to quickly run some code, I copy the code, click the shortcut in the doc, paste in the text and hit f5 to run. Quick, easy, simple, flexible.
I think what you're looking for is http://live.gnome.org/Gedit/Plugins/BetterPythonConsole.
You hit F5 and it runs the code in your file in a IDLE-like console. I don't know if it can only run selected code. (I don't think it can) but you can always copy the needed code in a new window and run it from there.
Have a look through the plugin list for other interesting stuff: http://live.gnome.org/Gedit/Plugins
The closest to a decent IDE...
Install gedit-developer-plugins (through synaptic || apt-get) and don't forget to enable (what you need) from gEdit's plugins (Edit->Preferences [tab] plugins) and happy coding