I have just written a bunch of lines of code on the Python prompt at the terminal. Now, I want to save all those lines of code to a .py file.
I am unable to find out how to do that. The only thing that I could find on StackOverflow was this answer but it shows only how to do it in an iPython notebook. I am not using an iPython notebook. I am running the code at the command line on the terminal.
I tried to follow that answer (because just in case) and ran the %save magic command on the terminal but it gave a SyntaxError.
So, how do save it?
Thanks!
See http://blog.e-shell.org/174 . As wu explains, the python prompt is using readline, and you can import a Python library to access this.
>>> import readline
>>> readline.write_history_file('/path/to/history.txt')
You can trying using another interpreter : bpython , I belive it has what you need,check it out.
Save the code you've entered to a file.
You seem to be affected by the misconception, that the python environment is workspace-centered (similar to what I know from Smalltalk and some LISP variants):
fire up with an initial workspace
modify by your liking
store the result
This is unfortunately not the case. While you can import existing files, the other option is to specify an existing file as initially to be loaded and keep the interpreter open by using the -i option.
It really depends on your terminal for the exact commands.
The general idea is to copy everything (if possible) or one page at a time from the terminal into a text editor and then clean the >>> prompts (and possibly other formatting problems) in the text editor.
But anyway, typing a lot of commands directly in the execution environment if really bad practice. At least you test a handful of lines and immediately save them in a file. IDLE is great at this game...
When inputting the name Python3.6 is not displaying the required output
And here is the image of my build-system
Here I got the solution :-
I installed SublimeRepl package in sublime-text3
Then I edited python file in sublimerepl, for this refer:- Sublimerepl-Python
3.Then I run my python file through SublimeRepl, and it worked
This happens because the text you are typing into Sublime Text is not being passed to the Python interpreter. From the program's perspective, it is still waiting for input.
I don't think it's possible to modify this behavior in Sublime Text. This limitation is part of the text editor's functionality, and hopefully it will be addressed in a future release.
Try this.
print('Hello {0}'.format(name))
and make sure using terminal to run your .py file
I'm trying to highlight part of my output in the Windows console as follows:
print 'Matches:'+'\033[0;33m'+str(123)+'\033[0;0m'
It works fine in a Linux terminal, but under Windows it shows
>>>Matches:[0;33m123[0;0m
How can I enable highlighting in the Windows console?
PS: I think there should be a way to do this because it works with raw_input. For example:
I have tried a method, mentioned by #eryksun, thanks for your help.
from IPython.utils.io import stdout;
stdout.write('Matches:'+'\033[0;33m'+str(123)+'\033[0;0m')
Here is the outout:
For further discussion, I find that even in pure python shell, the raw_input() works fine to highlight the text, but stdout.write is not working any more.
Here is the python shell output:
I'm trying out some data science tutorials with python and can't get print to, well, print! when I run a .py in windows command shell or powershell. Print does work when I use the interpreter, but I have to type it in line by line (I'm not seeing how to run a .py as a file in the interpreter). I'm attaching snips of the file, and a snip of me running in the interpreter. I tried to attach snips of what happens when I run in command shell and powershell, but apparently I need at least 10 reputation points before I can post more than 2 links. Admittedly, those snips weren't interesting; there is no error and nothing printed. It just runs and returns to the prompt.
Also, as a test, I saved a .py file that simply does print ("Hello") and it does print correctly in windows command prompt and powershell.
Thanks in advance for any help!
Casie
PY script
Snip From Python Shell
Is that image from the IDLE console? To run the script you are editing, use menu Run > Run Module, or F5. Every python GUIs has an equivalent feature.
To run an arbitrary script from inside the commandline interpreter, say mywork.py: As long as it's in the working directory that you were in when you started the interpreter, you run it (once) by typing import mywork. (As you can see, its name must be a python identifier.)
Edit: You'd get to the bottom of this a lot quicker if you'd put print("Hello, world") in a script by itself and run it. From over here it looks like it would print just fine, proving there's nothing wrong with your python interpreter.
Your script has a bug, though: As soon as you enter the function random_kid(), you leave it again since you return a value on the first line. All those print statements are never executed. Why you think it works differently with %run I can't say, but for sure this function cannot print any output.
Is there a GUI for IPython that allows me to open/run/edit Python files? My way of working in IDLE is to have two windows open: the shell and a .py file. I edit the .py file, run it, and interact with the results in the shell.
Is it possible to use IPython like this? Or is there an alternative way of working?
When I'm working with python, I usually have two terminal windows open - one with IPython, and the other with a fairly customized Vim.
Two good resources:
http://blog.dispatched.ch/2009/05/24/vim-as-python-ide/
http://dancingpenguinsoflight.com/2009/02/python-and-vim-make-your-own-ide/
Though it sounds like what you want is IPython's magic function %ed/%edit:
An example of what you can do:
In [72]: %ed
IPython will make a temporary file named: c:\docume~1\wjwe312\locals~1\temp\ipython_edit_ar8veu.py
In the file I put:
x = "Hello World"
print 3
After saving and quitting the file:
Editing... done. Executing edited code...
3
Out[72]: "x = 'Hello world'\nprint 3\n"
In [73]: x
Out[73]: 'Hello world'
You can define functions or anything else - just remember that the contents of the file will be executed when you close it.
Another similar workflow is to cd to the directory containing your Python script that you're editing with your favorite editor. Then you can %run the script from within IPython and you'll have access to everything defined in the file. For instance, if you have the following in the file test.py in your /home/myself directory:
class Tester(object):
def __init__(self):
print "hi"
def knightme(name):
print "Hello, Sir ", name
Then you can do the following:
In [42]: cd /home/myself
/home/myself
In [43]: %run test.py # <Tab> autocomplete also works
In [44]: knightme('John')
Hello, Sir John
In [45]: t = Tester()
Hi
Either a mix or one of those workflows should give you something very similar to the way you're used to working in IDLE.
Spyder, previously known as SPyderlib / Spyder2
Pretty lightweight, fast and support almost all features you will ever need to work with a python project. It can edit and run .py files in an embedded IPython instance and then interact with them, set breakpoints, etc.
full-size
Try Spyder, I have spent all day trying to find an IDE which has the functionality of ipython and Spyder just kicks it out of the park..
Autocomplete is top notch right from install, no config files and all that crap, and it has an Ipython terminal in the corner for you to instantly run your code.
big thumbs up
Take a look at DreamPie. Might be what you are looking for.
Personally, I like PyScripter. Unfortunately, it only works on Windows, but also runs perfectly in Wine.
The latest version of IdleX supports IPython within IDLE, as well as the %edit magic. You can run your files from the IDLE editor within the IPython shell many ways, either by F5 (run everything), F9 (run a selection), or Ctrl+Enter (run a subcode).
sudo apt-get install ipython
Once you are done with installing ipython.
Start ipython from terminal (just hit ipython in the ternminal)
To run ravi.py file all you need to do is
%run ravi.py
If you like the work-flow under Matlab, then you probably should try the following two:
1, Try the combination of Spyder and Vim.
Edit python files in Vim (Spyder can reload the file automatically)
Run the code in Spyder (in the same interpreter, which is important for me):
Use F9 to run the current file
Ctrl+F9 to run the selected block
2, Use Vim + conque-shell. (on google code)
Open your preferred Python interpreter in Vim,
e.g., just :ConqueTermSplit python.
then visual select some Python code
press F9 to paste and run it in the Python interpreter buffer.
Note: a few more:
:ConqueTermVSplit python,
:ConqueTerm python
:ConqueTermVSplit rlwrap python
If your interpretor misses readline, you can use rlwrap.
You might like PySlices...
It's kind of a shell/editor hybrid that lets you save your session as special (barely) modified python files called .pyslice files.
It's now part of wxPython, so just install that (v2.8.11 or later) and run "python -m wx.py.PySlices" on the command line to launch it.
That said, I still end up using an external editor for scripts (geany).
I want to suggest excellent plugin for vim that makes two-way integration between Vim and IPython: vim-ipython.
From project page on http://github.com/ivanov/vim-ipython:
Using this plugin, you can send lines or whole files for IPython to execute, and also get back object introspection and word completions in Vim, like what you get with: object? and object. in IPython.
This plugin has one big limitation: it doesn't support python 3 (it's planned).
Personally, I use what #Wayne suggested, a combination of vim and ipython...
However, if you'd prefer a different approach, take a look at spyder.
As of the latest version (1.1) ipython should be fully integrated. If you download an earlier version, things will work fine with ipython as an external shell, but you won't get a few of spyder's nifty features (like viewing all of the currently defined variables in the workspace window).
Spyder is definitely a bit heavyweight, but it's an interesting project.
Another (very, very, new) similar project to take a look at is iep. It will (sort-of) work with ipython as shell, and I'd be willing to be bet that nicer ipython integration will be along before too long. At any rate, iep is essentially a more lightweight alternative to spyder.
Both of these are oriented towards scientific computing, and so have nice integration with things like matplotlib (and thus can automatically run gui main loops in a seperate thread). They're not quite like "normal" IDE's but they may fill the niche you're looking for quite nicely.
You can use the autoreload module in IPython to automatically reload code.
Open jupyter qtconsole or jupyter console and type:
%load_ext autoreload
%autoreload 2
from your_work_file import *
Now every time you save your_work_file.py, it will be automatically reloaded.
Hint: if you want this to happen automatically, put the followinglines in your ipython_config.py file:
c.InteractiveShellApp.extensions = ['autoreload']
c.InteractiveShellApp.exec_lines = ['%autoreload 2']
Try Ptpython. It has much better integration with VIM. You can directly edit in VIM by just pressing V. It also allows browsing your history.. so you can pretty much code in the shell, and incrementally build up your code.
If you are already familiar with ipython, you can check the advantages of ptpython here:
https://www.youtube.com/watch?v=XDgIDslyAFM
I just use the exclamation mark (!) to run vi as a shell command
In [1]: !vi myScript.py
and when done with editing I just quit vi to get back to the Ipython shell.
To run the script one can then use
In [2]: %run myScript.py
as suggested in another answer and not !python ... because the Python version in ipython might be different from the one in the underlying shell.
If you want to dump some code in a file use the magic %%writefile
In [3]:%%writefile myScript.py
...: print("hello")
...:
...:
Be careful because this will overwrite myScript.py. To append use %%writefile -a.