Why does Tkinter work in the terminal but not in Pycharm? - python-3.x

Using Pycharm on Linux mint.
I installed the "future" package for the python interpreter which I'm using. Heres the script.
from tkinter import *
top = Tk()
top.mainloop()
Didn't work. It returns "ModuleNotFoundError: No module named 'tkinter'". Tkinter is infact installed. "python3 -m tkinter" confirms it. And when I compile the same code in the terminal, it displays.

As Bryan says, you're probably not using the Python version you think you're using. PyCharm tends to install its own version of Python. Once you have more than one version of Python installed, things get trickier.
To see what's happening, try running this script:
import sys
print(sys.executable, sys.version)
Or run those similar commands from the command line. That should help clarify matters.
The sys.executable will show you the full path to your Python executable. Great for seeing where the used Python installation is located.
I don't use Python on Linux, but perhaps one of your Python installations is version 2, in which case you would need to use:
from Tkinter import *
which is another way to confirm that the Python is version 2 rather than 3. If this is the case, you'll want to move to Python 3. I don't think anyone writes new projects in Python 2 anymore. It's defunct, purely legacy.
It's also possible that Python is installed on Linux without Tkinter. There are other posts on how to install Tkinter on Linux. For instance, you can check out ImportError: No module named 'Tkinter'

Thanks guys for the help I really appreciate it. But I found out the problem was because of Linux Mint's Software Manager. I initially downloaded pycharm using said software manager but it didnt work which is why I created the post. Then I deleted it, and downloaded pycharm through the tar.gz file from the jetbrains website. After doing that, it seems to work.

Related

Does anyone know how to make python go to the system default tk installation (on Linux) for the tkinter install in the make/configure process

So I have been trying to install Python3.9 with tkinter for a bit now and I have finally come up with a mediocre solution with one problem which is I can't figure out how to make python use the tk8.6-dev package on Debian to install the _tkinter module.
Edit 2 hours later: Figured out answer to first problem. Now need help finding out how to make python successfully find the tcl.h file in /usr/include/tcl8.6/tcl-private/generic/
and the tk.h file in
/usr/include/tcl8.6/tk-private/generic/.

What is the difference between "python" and "pythonw" in the mac Terminal?

im fairly new to programming in Python and i've been using the terminal to run my code with no problem. Usually by typing python {filename} to run it.
However, recently i got this error:
ImportError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are using (Ana)Conda please install python.app and replace the use of 'python' with 'pythonw'. See 'Working with Matplotlib on OSX' in the Matplotlib FAQ for more information.
then i changed the python {filename} to pythonw {filename} and the code worked. Could someone give me some insight into this error and why it worked by just adding w?
pythonw - run python script allowing GUI. According to the man page for pythonw.

PyCharm Import Error: Claims 'matplotlib' is not a package, but works successfully in IDLE

Happy October everyone,
I've successfully downloaded modules before using either the pycharm installer or pip through the command screen, but for some reason when installing matplotlib pycharm cannot recognize it. I've uninstalled and reinstalled, I've installed through both methods, I've followed past similar questions asked on this site which make sure that you have the same interpreter and that it was installed in the right folder (pycharm error while importing, even though it works in the terminal).
So, here's the whole problem. Here's is the simple code, submitted into both pycharm and IDLE:
import matplotlib.pyplot as plt
plt.plot([1,2,3],[2,1,3])
plt.show()
When submitted into IDLE, my plot appears. When submitted into pycharm, the following error appears:
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/PythonProject/matplotlib.py", line 1, in <module>
import matplotlib.pyplot as plt
File "C:\PythonProject\matplotlib.py", line 1, in <module>
import matplotlib.pyplot as plt
ImportError: No module named 'matplotlib.pyplot'; 'matplotlib' is not a package
I am currently running Python 3.4, PyCharm 2016.2.3, and my matplotlib folders are indeed in my site-packages folder inside my Python34 folder. Also for further verification:
PyCharm installation
Please help I've become frustrated since this is the only module I've run into trouble with. I've scoured StackOverflow and related websites to help, I've made sure I have all the requirements, etc.
I guess if you named your current writing python module as matplotlib.py.That cause the python load your current writing module instead of the actual matplotlib.py, which triggers an error.
I recommend you to use virtualenv. Is not strictly necessary but is good for dividing your project environments.
This is how I tested matplotlib on my Windows 10 installation, hope it helps.
Be sure that you have the python 3 installation folder listed in your Windows PATH environment variable, should be already listed if you checked "Add Python 3.5 to PATH":
You need also to set the Scripts folder in your PATH environment variable usually should be this path:
C:\Users\<your username>\AppData\Local\Programs\Python\Python35\Scripts
If you don't do that you have to prepend python -m to every command below like this: python -m <command>, so the command below would be python -m pip install virtualenv. I prefer the first solution.
To test matplotlib on Pycharm I've used virtualenv, here is how; first install virtualenv:
pip install virtualenv
Then you create your virtual environment in a folder of your choice, in my case I used python_3_env_00:
virtualenv python_3_env_00
After that you can activate you python 3 virtual environment:
python_3_env_00/Scripts/activate.bat
Now you should see in your command line the active virtual environment (python_3_venv_00), like this:
Now you can install matplotlib:
pip install matplotlib
Fire up PyCharm and add your virtual environment as you project interpreter, go to File->Settings search for Project Interpreter click on the gear icon and Add Local and set the path of your virtual environment, should look like something like this:
Test it:
import sys
print(sys.path)
run this code in where the import worked, and run it in the Pycharm project. Compare the lists. Find out which path that is not present in Pycharm sys.path.
Before importing pyplot, append the missing path to sys.path.
import sys
sys.path.append("the path")
import matplotlib.pyplot as plt
Does this work?
Please follow below steps if you are still getting an error:
If you are using PyCharm, it automatically create virtualenv.
Ensure Scripts path is set into PATH
C:\Users\<Username>\AppData\Local\Programs\Python\Python37-32
Then open PyCharm and go to File-> settings. Search for Project Interpreter. You will see window like this
sample image
Click on setting icon -> Existing Environment -> click on ... give below path
C:\Users\Krunal\AppData\Local\Programs\Python\Python37-32\python.exe
Click on Apply -> ok and you are good to go.
After installing matplotlib When I was trying to use matplotlib.pyplot it was giving error module not found.
I browsed some white papers and found out that we also need to install scipy library to use the matplotlib so I used the below in my command prompt
python -mpip install scipy
Restarted my kernel session.
It worked!!!
I was also facing issue while importing matplotlib but it got resolved and now I am able to use it from pycharm as well.
Please make sure you should have visual c++ 14 installed in your system.
2.If you have more than two python version installed on your system then please install matplotlib from both the version.
Eg. pip install matplotlib
pip3 install matplotlib
If matplotlib is working from python idle then please check whether you are using correct interpreter in pycharm or not and try to choose pythonw.exe path from your installed location.
Hope this will help, Please do let me know if you are still facing issue.
I had similar issue but I solved it very easily on pycharm 2019.3.2. In case anyone looking for an easier solution:
I just opened the terminal window on pycharm and typed pip install matplotlib and it was all good to go. Every project has its own virtual environment. Opening terminal window of IDE cds to project directory by default. So the installing command was enough.

Python 3.3 + pygame installation

First, I am aware about the existance of a similar older thread, but honestly, I would not ask, if I found any help there.
Being a simple coding enthusiast, I want to playback media in using python. Since there seems to be no simple solution, a lot of people recommend pygame (or pyglet). So, using win 7 x64, I revert to 32bit Python 3.3.5 and download the presumably correct version of pygame from the super secret download site (pygame-1.9.2a0.win32-py3.3). Both installations work seemingly fine, pygame can locate python (path is set correctly), and finishes its install without issues, yet it seems not to install anything. I cannot import pygame, there are no installed libraries to be found. In pure frustration I tried different iterations of versions, python 2.7, x64, older pygame versions. Nothing worked. I suspect, there is something going on, that may not be connected to the pygame installation, but I don't know what.
import pygame
returns
Traceback (most recent call last):
File "C:/***/pygame_test.py", line 1, in <module>
import pygame
ImportError: No module named 'pygame'
Try using Python 3.2.3 instead of 3.3, along with Pygame for that version: that's what I did, and it works flawlessly on the same system as yours.
You should check up with your installation. Are you sure you installed properly. I have checked on 3.4/3.6/2.7 all works fine. Just install the correct binaries based on your system from http://www.lfd.uci.edu/~gohlke/pythonlibs/.
Download pygame using pip, to be sure that the module is placed in the correct path. Else, put the pygame folder in .\pythonX\Lib\site-packages\. Verify the folder is named pygame and not for example pygame-1.9.2a0.win32-py3.3.

How can I make my script choose the right python interperter?

I have both 2.7 and 3.0 versions of the Python interpreter installed (on my Ubuntu 32 system), but one particular script uses 3.0.
Using
#!/usr/bin/python3 -B
will not work when the program is run with python myprogram.py.
And I also need a solution that works also in Windows where I also have both python versions installed.
How can I make the script to run only with the right python version?
Please use virtualenv, which makes isolated Python environments easy.
python = Python to use. # This has to be the absolute path to Python executable
os.execl(python, python, * sys.argv)
This way you can restart the script with the python you want to use. Not really stylish.
I don't know why you can't just launch the program with python3 foo.py, but it's possible to have a python2 program relaunch itself as python3 with something like this.
import sys
if sys.version_info.major != 3:
import os
# replace this process with a python3 process
os.execlp("python3", "python3", *sys.argv)
It's a bad solution though, because now your python3 program can't use anything that's not valid python2 syntax
Please take a look at The wrong python interpreter is called
You have to choose a correct interpreter based on where you installed the desired version of Python and your system variables.

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