I am a beginner of spyder IDE for Python.
To use spyder IDE, I command "spyder" on anaconda console with python 2.7
After that, I try to print "hi"
But I encounter an error message
"No python shell is currently selected to run hu.py Please select or open a new Python interpreter and try again"
How could I solve this problem?
I saved my file on C:\Anaconda\practice_jhk
from __future__ import print_function
print ("hi")
You can specify the Spyder's Run Settings in Run -> Configure (F6). By default "Execute in current Python or IPython console" is selected and you probably do not have any open console in Spyder.
You can select "Execute in a new dedicated Python console" option and Spyder will automatically open a new console for you. Or you can leave the dafault option and create a new console yourself in the Consoles menu.
I have had the same problem. I am not able to fix it but I am able to successfully run the program the following two ways and I don't find any problems till now:
By selecting IPython console (not the one with the Kernel id as its tab) then running your program.
By selecting "Execute in new dedicated Python console" from Tools --> Preferences --> Run.
I was getting the same error message, but then realized I was not directing the PATH to my Python interpreter file at all. How I solved the problem:
Go to Tools > PYTHONPATH manager
Select "Add path"
Find and select your Python interpreter folder (for me this was C:\Python27)
Try, tools -> Reset sypder to factory default. Then, click on the run button in the dialog box.
I had this issue when I didn't have the python console pane open.
To resolve this, in the top bar go to: view -> panes and turn ipython console on.
This fixed it for me.
You might have unexpectedly closed the Ipython console window which is open by default and that caused the error.
Go to Consoles > New console(default settings)
Related
I initially started learning Python in Spyder, but decided to switch to PyCharm recently, hence I'm learning PyCharm with a Spyder-like mentality.
I'm interested in running a file in the Python console, but every time I rerun this file, it will run under a newly opened Python console. This can become annoying after a while, as there will be multiple Python consoles open which basically all do the same thing but with slight variations.
I would prefer to just have one single Python console and run an entire file within that single console. Would anybody know how to change this? Perhaps the mindset I'm using isn't very PyCharmic?
There is a specific option in PyCharm 2018.2+: Settings | Build, Execution, Deployment | Console | Use existing console for "Run with Python console".
Run with Python console is an option you have enabled in the Run Configuration. Disable it if you don't need a Python console after a script execution:
Hi: If you are looking for re running the code again in the same python console everytime then you have to check the respective box in the Project settings as shown in image below.
To allow only one instance to run, go to "Run" in the top bar, then "Edit Configurations...". Finally, check "Single instance only" at the right side. This will run only one instance and restart every time you run.
One console is one instance of Python being run on your system. If you want to run different variations of code within the same Python kernel, you can highlight the code you want to run and then choose the run option (Alt+Shift+F10 default).
You have an option to Rerun the program.
Simply open and navigate to currently running app with:
Alt+4 (Windows)
⌘+4 (Mac)
And then rerun it with:
Ctrl+R (Windows)
⌘+R (Mac)
Another option:
Show actions popup:
Ctrl+Shift+A (Windows)
⇧+⌘+A (Mac)
And type Rerun ..., IDE then hint you with desired action, and call it.
I think that what you are looking for is the last option in this window; check it and it should work.
Settings -> Build, Execution, Deployment -> Console
I am just starting to learn Python and I am using Windows 10. I downloaded and installed Python 3.4.3. But everytime I open Python from my Desktop or from C:\Python\python.exe it just opens a black command prompt without any Menu options like File menu, Edit Menu, Format Menu etc. I can't see any colors of the code, it's just black screen with white text. I searched about it on internet and came to know that what I am opening is the Editor winodws and I need to open Shell Window in order to have access to all of those options and features. I can't figure out where is the .exe of Shell Window and with what name is it? Please help me.
P.S. I also tried to open pythonw.exe that was present in the Python folder where it was installed, but nothing opened.
In Windows you will need to right click a .py, and press Edit to edit the file using IDLE. Since the default action of double clicking a .py is executing the file with python on a shell prompt.
To open just IDLE:
Click on that. C:\Python36\Lib\idlelib\idle.bat
Start menu > type IDLE (Python 3.4.3 <bitnum>-bit).
Replace <bitnum> with 32 if 32-bit, otherwise 64.
Example:
IDLE (Python 3.6.2 64-bit)
I agree with one who says:
just type "IDLE" in the start-menu where it says "Type here to search" and press [{ENTER}]
If your using Windows 10 just type in idle where it says: "Type here for search"
My solution to setting options and then invoking Idle on a python script is:
Set optn=blah
...
Set optn=blah
start pythonw C:\Users\%USERNAME%\AppData\Local\Programs\Python\Python36-32\Lib\idlelib\idle.py STFxlate.py
This allows you to setup the environment prior to invoking idle.
This assumes that pythonw is in the current path
For those using Anaconda, type idle on windows search bar ("Run or Execute command"). This probably wont work if you didn't install anaconda with environment variables. You can also go to
Anaconda3 folder > Scripts >idle.exe
and create a shortcut to you desktop.
I just installed Python Tools with Visual Studio 2013 (Shell) and whenever I run a debug of the program, a separate window pops up for the interpreter:
I can however run the program using the internal interactive console:
However this doesn't seem to stop at any breakpoints that I set in the code. Is there a way to force the system to use the internal console for debugging instead of using a separate windowed console?
You can hide the shell by changing Environment options in Python Tools with Visual Studio, change the default path to point pythonw.exe.
Here is the steps:
TOOLS -> Python tools -> Python Environment
Open Environment options, Add Environment, Enter whatever you want to name it.
Copy all the options in the default Environment except change "Path:" to path of pythonw.exe. Hit OK and made the new Environment as the default environment.
There's no way to hide the console window entirely, but all output from it should be tee'd to Output window, so you can use that if you don't like the console.
There's also a Debug Interactive window (Debug -> Windows -> Python Debug Interactive) that you may find of help, if what you want specifically is being able to stop at breakpoints and then work with variables etc in a REPL environment. Once enabled, this window will provide you a live REPL of the debugged process, and when you're stopped anywhere, you can interact with it. Like Output window, it does not suppress the regular console window, but it mirrors its output.
Although this seems old, solution pasted elsewhere can help someone searching an answer.
I cannot comment since I don't have rep.
Here is the solution: https://stackoverflow.com/a/22486749/4809808
As far as the console window it will generally open unless you mark your app as a Windows application in project properties (this will launch pythonw.exe which doesn't include a console window).
If you right click on your project and choose Properties in the "General" tab there's a "Windows Application" checkbox below Working Directory.
I'm new to python and pycharm and I'd like to run a module from the pycharm console in the same way as you can from IDLE, if it's possible.
The idea is to create simple functions and test them "live" using the console.
...how do you do that in pycharm?
Running python scripts using pycharm is pretty straightforward, quote from docs:
To run a script with a temporary run/debug configuration Open the
desired script in the editor, or select it in the Project tool window.
Choose Run on the context menu, or press Ctrl+Shift+F10. So
doing, a temporary run/debug configuration is created on-the-fly.
Besides there is a "Python Console" available in pycharm: see documentation.
UPD:
Here's an example.
Imagine you have a python module called test_module.py:
def a(*args, **kwargs):
print "I'm function a"
def b(*args, **kwargs):
print "I'm function b"
Then, in pycharm's "Python Console" you can do this:
>>> from test_module import *
>>> a()
I'm function a
>>> b()
I'm function b
If you need to execute a part of an existing code, you can use the Execute Selection in Console feature: select the code snippet -> right click -> "Execute Selection in Console".
For anyone still having this problem: Go to the Run/Debug menu, choose Edit Configuration, check the box 'Show command line' this will enable you to enter parameters in the console at the >>> prompt and test your function.
Edit: To make this change apply to all your .py files (as this check box only applies to the current file you're working on) go to: Edit configuration, in the pop up you will see a menu tree on the left, select Defaults, then Python, then check the 'Show command line' box, this will make it the default setting whenever you open a .py file, (this feature should really be on by default!)
Right Click --> Run File In Console
Done!
Looks like in version 2018.3, this option is now Run with Python console in Run/Debug Configurations:
What you're looking for is the feature called Execute Selection in Console which is described in section Loading Code from Editor Into Console of PyCharm's online help.
Select the script lines that you want to execute and press Shift+Alt+E
You can run the Find Action shortcut (Ctrl+Shift+A or ⌘+⇧+A on mac), then type run file, and choose the option Run file in Console.
In pycharm do:
Run>Edit Configuration>Show command line afterwards
Assuming your code is in file MySimpleCode.py you can simply say
run MySimpleCode
in the PyCharm console. This assumes that you have set your working directory properly; e.g. if MySimpleCode.py is located in d:\work on a Windows system you must execute
cd d:\work
first. In my opinion the other solutions miss what the post really wants: simply executing a file like from a DOS or Unix shell, or a .m script in MATLAB. No messing with imports, projects and so on. If you use CTRL SHIFT F10 your code gets executed, sure, but in a different environment, so you have no access to variables created in your code. I assume the question means that you want to do further work with the results of the script.
Explanation for people with MATLAB background: In most Python IDEs you have to configure an interpreter first in some kind of project. The MATLAB equivalent would be a master IDE where you can choose your MATLAB version for each project. This makes it possible to run your Python code on the CPU, your GPU or even an external NVIDIA board with different settings (after several days in the installation hell). For the beginner this is very confusing, because for simple code samples any "default" interpreter should suffice. Unfortunately this is not the case for Python (2 or 3? 2.x or 2.y? which package version?), and it will get worse as you progress (which 32 or 64 bit version of TensorFlow is available for Python 3.x? and so on).
I'm trying to teach Komodo to fire up IDLE when I hit the right keystrokes. I can use the exact path of the shortcut in start menu in the Windows Explorer location bar to launch IDLE so I was hoping Komodo would be able to use it as well. But, giving this path to Komodo causes it to say that 1 is returned. This appears to be a failure as IDLE doesn't start up.
I thought I'd avoid the shortcut and just use the exact path. I go to the start menu, find the shortcut for IDLE, right click to look at the properties. The target is grayed out, but says "Python 2.5.2". The "Start in" is set to, "C:\Python25\". The "Open File Location" button is also grayed out.
How do I find out where this shortcut is really pointing? I have tried starting python.exe and pythonw.exe both in C:\Python25, but neither starts up IDLE.
There's a file called idle.py in your Python installation directory in Lib\idlelib\idle.py.
If you run that file with Python, then IDLE should start.
c:\Python25\pythonw.exe c:\Python25\Lib\idlelib\idle.py
In Python 3.2.2, I found \Python32\Lib\idlelib\idle.bat which was useful because it would let me open python files supplied as args in IDLE.
Here's another path you can use. I'm not sure if this is part of the standard distribution or if the file is automatically created on first use of the IDLE.
C:\Python25\Lib\idlelib\idle.pyw
If you just have a Python shell running, type:
import idlelib.PyShell
idlelib.PyShell.main()
there is a .bat script to start it (python 2.7).
c:\Python27\Lib\idlelib\idle.bat
Python installation folder > Lib > idlelib > idle.pyw
Double click on it and you're good to go.
You can also assign hotkeys to Windows shortcuts directly (at least in Windows 95 you could, I haven't checked again since then, but I think the option should be still there ^_^).
The idle shortcut is an "Advertised Shortcut" which breaks certain features like the "find target" button. Google for more info.
You can view the link with a hex editor or download LNK Parser to see where it points to.
In my case it runs:
..\..\..\..\..\Python27\pythonw.exe "C:\Python27\Lib\idlelib\idle.pyw"
I setup a short cut (using windows) and set the target to
C:\Python36\pythonw.exe c:/python36/Lib/idlelib/idle.py
works great
Also found this works
with open('FILE.py') as f:
exec(f.read())
Another option for Windows that will automatically use the most recent version of Python installed, and also doesn't make you look for the installation path:
Target: pyw -m idlelib
Start in: Wherever you want
I got a shortcut for Idle (Python GUI).
Click on Window icon at the bottom left or use Window Key (only Python 2), you will see Idle (Python GUI) icon
Right click on the icon then more
Open File Location
A new window will appears, and you will see the shortcut of Idle (Python GUI)
Right click, hold down and pull out to desktop to create a shortcut of Python GUI on desktop.
Python installation folder > Lib > idlelib > idle.pyw
send a shortcut to desktop.
From the desktop shortcut you can add it to taskbar too for quickaccess.
Hope this helps.
If it's installed on windows 10 without changing default location, it seem it is in "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.1776.0x64__{BUNCHOFRANDOMSTRINGS}"
and you won't be able to open it.
Good luck finding how open .py by default with idle.