When running the PyCharm debugger and having stopped at a break point, is there a console to run and display some computation with the local variable exposed to me?
What I have in mind is the debugger setup in Matlab, where when stopped at a break point in a function, one can run scripts using the variables inside the function.
If I have understood well what do you mean, yes, PyCharm provides you a console where you can run local scripts or just see the variable's value at breakpoint time.
Start PyCharm debugger and at the bottom of your window you should see the main console.
You have to press a botton named "Show Python Prompt". Now, you should be able to write in console.
Look at the picture for more details.
You can use Evaluate Expression and Watches features to run code while debugging.
Related
I am writing Python scripts in Pycharm with IPython installed. So I can use Python Console in Pycharm to type Python commands and check the immediate output of the codes. However, when I run a script file after pressing 'Run' button (Shift+F10), all the variables and functions are not visible to the Python Console. This is, however, the feature of Spyder, another popular Python IDE. So here is my question: how can I configure Pycharm so that running a Python script file is visible for Python Console? Thanks
You could also run the part of your code you want to test/check in the console by selecting it and then right clicking and clicking on "Execute Selection in Console Alt-Shift-E". That's what I use sometimes when the debugger is not helpful. After running the code (you can also just "run" functions or classes) the console knows the functions and you can use the same features that Spyder has. However, be aware that when you change the code you need to run it in the console once to update the console definitions!
You can not. But you can use pdb (which will break code execution where you need it and you will be able to do the same things, as in the Python Console).
And, which is better and more powerful, you can use PyCharm's debugger. It represents all available variables in tree-like structures and is really handy.
I'm using visual studio code with standard python extension, my issue is that when I run the code the python interpreter instantly closes right after and I only see the output which means that if I create some data structure I have to create it every single time. Is it possible to leave the console open after running the code and maybe running multiple files in the same python interpreter instance?
I used to use spyder which is entirely doing what you want (probably like PyCharm)...
Then I briefly tried VS Code, and it is quite easy to make it behave that way too.
First make sure you have an integrated terminal open (or do Ctrl+`, or View > Integrated Terminal), then in that terminal launch ipython.
Now, when you use the commands from Don Jayamanne's Python extension (Ctrl+Shift+P to open commands palette):
"Run Python File in terminal"
"Run select/line in Terminal"
It will run the line inside the ipython console directly. So running the entire file will call python module.py inside ipython, and thus fails.
So to make this work simply create settings to map which command is executed when "Run select/line in terminal":
Open Language specific settings (Shift+Ctrl+P, search "Configure Language specific Settings...")
Pick up Python
Now I would suggest to make change only in your workspace settings (top-right tab) to keep default behaviour in other cases
so add in WORKSPACE SETTINGS:
(keep in mind it is just a simple/stupid workaround)
{
"python.pythonPath": "run"
}
Now when runing whole file, it will use ipython function run within the ipython terminal that we launched, thus keeping all your workspace variables.
Also, if you run some line of code with "Run Select/Line in Terminal", the ipython session of that terminal keep all variables.
This allows live debugging, without actually going in the debug mode.
When you run a program, it runs until it ends. Then it closes. If you want it to stay live longer, you can make a program which does not stop until told so, e.g.
while True:
something = raw_input('Write something: ')
print('You wrote: %s' % something)
if something == 'bye':
print 'bye.'
break
This will run until user writes "bye".
I'm quite late to this conversation, but a workaround I use is to put a pass statement at the end of my file, then add a breakpoint to it. I then run it in the debugger and can access all of the variables etc.
This allows most of the functionality that I used to use in the PyCharm python terminal, such as exploring data structures, checking out methods, etc. Just remember that, if you want to make a multi-line statement (eg. for a loop), you need to use Shift-Enter to go to the next line otherwise it'll try to evaluate it immediately.
I have integrated PTVS into Visual studio so that i can have intellisense support and debugging capability.
I set Breakpoints at Function definitions, but when i debug the control goes directly out of function. And in some points the Console window pops up and it never iterates to the next line of code.
I liked PTVS but this thing has stuck me up.
In options->Python tools-> Interpreter options i have set it as Python 2.7
Can Anyone tell me whats wrong with the options and why that console screen is appearing.
Thanks in advance.
When you say you're setting breakpoint at function definitions do you mean on the line with the "def ..." or are you setting the breakpoint on the 1st statement of the function?
In Python functions are executable statements so if you're putting the breakpoint on the def line then you're going to hit the breakpoint when the function is being defined rather than being executed.
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 that doesn't help you might want to post the code you're having trouble with or a screenshot of the code with where the breakpoints are set.
Are there any smooth way to run Python scripts in the PyCharm's console?
My previous IDE - PyScripter - provides me with that nice little feature. As far as I know PyCharm has 2 ways of running script in console:
1) Select a bunch of code and press Ctrl+Alt+E.
2) Save the code in a file and import it from the Console.
Are the any way to do it by pressing "Run" or "Debug" buttons? I need to see the result of my script in the console and all variables available to manipulate.
In the Run/Debug Configuration, add -i to the interpreter options. This will stop it from closing a python session even after a successful run. I.e. you will be able to see all the variable contents
Run -> Edit configuration -> select the script you want to run and give it a display name -> OK
Now you can run it with the green "Run" button. The green bug button (next to the run button) will run it in debug mode.
Remark: next to the run button you can monitor the script/configuration you run by selecting it's display name.
If you create run-time configuration then after pressing the run button (green "play" icon) you will get the desired result: your code will give you output in a console which opens atomatically at the bottom.
You can create many different configuraions for run and debug within a single project.
Here is a link from PyCharm's web help which covers the run/debug configurations:
http://www.jetbrains.com/pycharm/webhelp/run-debug-configuration-python.html
A possible way of manipulating the variables using debug mode and evaluate expression window is added in comment but I missed one detail: to see the result of your interactive code execution you have to switch from Debugger to Console output; mode tabs are on the top-left side of the bottom pane.
The way I do it is a create my script in the editor, call it myfirst.py, eg
print "Hello"
a= 1234
then in the console I run:
reload (myfirst)
To check on the variables use:
>>> myfirst.a
Not perfect but that's pyCharm for you. If you want a pyScripter like experience which I think is more useful you can try spyder2.
It may also be a good option for you to use the magic command
%run scriptname.py
in the ipython console (including the %-character). Compared to Cntrl + Alt + E you also get clean information on errors in your code.
Due to autocomplete it's also typed in a second and you can use this in any environment with an ipython shell. For me as a scientist who often uses python to explore data, this is a good option.
With your program in the editor:
Run - Edit Configurations
Then under Execution check the box for "Run with Python console".
When you run the program from the green arrow it will run in a console. After the run all your objects are available to examine and play with.
Let's consider 3 situations:
1) I write a pyhon module in Eclipse (pydev) and run it Ctrl-F11. The module runs and I don't have any control or access (AFAIK) to the module variables and functions.
2) I have defined a python interpreter as an external tool in Eclipse, so I can run it within Eclipse. It works fine, but it does not have tab completion.
3) I open my module with python IDLE (not eclipse) and press f5 (run). It runs on the IDLE opened window and when it finishes I have all the variables and functions form the module to play with.
So I have 2 questions:
a) how to enable, if possible, tab completion in python interpreter in Eclipse? If it's not possible, do I have any alternative to standard Python interpreter?
b) I would like to run step 1) and then be able to continue developing / testing with python interpreter, just like I do with IDLE, but all inside Eclipse. Any suggestion?
Thanks in advance
Not sure how much has changed since the question was asked, but it's now possible to get code completion in the debug console (as of PyDev 1.6.0 according to http://pydev.org/manual_adv_debug_console.html, I'm on PyDev 2.8.1, Eclipse 4.3.0)
Set a breakpoint in the code, on an executable statement (even just print('') or True). Double clicking on the grey vertical bar to the left of the code should do it.
Run in debug mode with F11
Eclipse may prompt to switch to the Debug Perspective; either way, the Console should be visible
You should now be able to click in the Console pane and begin interactive debugging with code completion, even after a traceback. (Ctrl+Space works for me.)
Be aware that multi-line statements won't work unless they're split on : or /:
Update in 1.6.0: commands are evaluated on each new line unless the line starts with ' ' or '/t' or ends with ':' or '/' (so, for entering multi-line statements, the input must be entered properly respecting those limitations).
If you run it as a debug operation in Eclipse, you should be able to set a breakpoint, and you can then examine variables, etc. But you can evaluate random python scripts via the watch functionality.