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ModuleNotFoundError: No module named 'pyshark' [duplicate]

In PyCharm, I've added the Python environment /usr/bin/python. However,
from gnuradio import gr
fails as an undefined reference. However, it works fine in the Python interpreter from the command line.
GNURadio works fine with python outside of Pycharm. Everything is installed and configured how I want it.
Gnuradio is located at /usr/local/lib/python2.7/site-packages/gnuradio
Also:
PYTHONPATH=/usr/local/lib/python2.7/site-packages:/usr/local/lib/python2.7/site-packages/gnuradio

Adding a Path
Go into File → Settings → Project Settings → Project Interpreter.
Then press configure interpreter, and navigate to the "Paths" tab.
Press the + button in the Paths area. You can put the path to the module you'd like it to recognize.
But I don't know the path..
Open the python interpreter where you can import the module.
>> import gnuradio
>> gnuradio.__file__
"path/to/gnuradio"
Most commonly you'll have a folder structure like this:
foobarbaz/
gnuradio/
__init__.py
other_file.py
You want to add foobarbaz to the path here.

You should never need to modify the path directly, either through environment variables or sys.path. Whether you use the os (ex. apt-get), or pip in a virtualenv, packages will be installed to a location already on the path.
In your example, GNU Radio is installed to the system Python 2's standard site-packages location, which is already in the path. Pointing PyCharm at the correct interpreter is enough; if it isn't there is something else wrong that isn't apparent. It may be that /usr/bin/python does not point to the same interpreter that GNU Radio was installed in; try pointing specifically at the python2.7 binary. Or, PyCharm used to be somewhat bad at detecting packages; File > Invalidate Caches > Invalidate and Restart would tell it to rescan.
This answer will cover how you should set up a project environment, install packages in different scenarios, and configure PyCharm. I refer multiple times to the Python Packaging User Guide, written by the same group that maintains the official Python packaging tools.
The correct way to develop a Python application is with a virtualenv. Packages and version are installed without affecting the system or other projects. PyCharm has a built-in interface to create a virtualenv and install packages. Or you can create it from the command line and then point PyCharm at it.
$ cd MyProject
$ python2 -m virtualenv env
$ . env/bin/activate
$ pip install -U pip setuptools # get the latest versions
$ pip install flask # install other packages
In your PyCharm project, go to File > Settings > Project > Project Interpreter. If you used virtualenvwrapper or PyCharm to create the env, then it should show up in the menu. If not, click the gear, choose Add Local, and locate the Python binary in the env. PyCharm will display all the packages in the selected env.
In some cases, such as with GNU Radio, there is no package to install with pip, the package was installed system-wide when you install the rest of GNU Radio (ex. apt-get install gnuradio). In this case, you should still use a virtualenv, but you'll need to make it aware of this system package.
$ python2 -m virtualenv --system-site-packages env
Unfortunately it looks a little messy, because all system packages will now appear in your env, but they are just links, you can still safely install or upgrade packages without affecting the system.
In some cases, you will have multiple local packages you're developing, and will want one project to use the other package. In this case you might think you have to add the local package to the other project's path, but this is not the case. You should install your package in development mode. All this requires is adding a setup.py file to your package, which will be required anyway to properly distribute and deploy the package later.
Minimal setup.py for your first project:
from setuptools import setup, find_packages
setup(
name='mypackage',
version='0.1',
packages=find_packages(),
)
Then install it in your second project's env:
$ pip install -e /path/to/first/project

For me, it was just a matter of marking the directory as a source root.

Add path in PyCharm 2017
File -> Settings (or Ctrl+Alt+S) -> Project -> Project Interpreter
Show all
Select bottom icon on the right side
Click on the plus button to add new path to your module

My version is PyCharm Professional edition 3.4, and the Adding a Path part is different.
You can go to "Preferences" --> "Project Interpreter". Choose the tool button at the right top corner.
Then choose "More..." --> "Show path for the selected interpreter" --> "Add". Then you can add a path.

DON'T change the interpreter path.
Change the project structure instead:
File -> Settings -> Project -> Project structure -> Add content root

In PyCharm 2020.1 CE and Professional, you can add a path to your project's Python interpreter by doing the following:
1) Click the interpreter in the bottom right corner of the project and select 'Interpreter Settings'
2) Click the settings button to the right of the interpreter name and select 'Show All':
3) Make sure your project's interpreter is selected and click the fifth button in the bottom toolbar, 'show paths for the selected interpreter':
4) Click the '+' button in the bottom toolbar and add a path to the folder containing your module:

For PyCharm Community Edition 2016.3.2 it is:
"Project Interpreter" -> Top right settings icon -> "More".
Then on the right side there should be a packages icon. When hovering over it it should say "Show paths for selected interpreter". Click it.
Then click the "Add" button or press "alt+insert" to add a new path.

As quick n dirty fix, this worked for me:
Adding this 2 lines before the problematic import:
import sys
sys.path.append('C:\\Python27\\Lib\site-packages')

On Project Explorer, you can right click on the folder where the module is contained and set as 'Source'.
It will be parsed in the Index for code completion as well as other items.

I'm new to PyCharm (using 2018.3.4 CE) and Python so I rotely tried to follow each of the above suggestions to access the PIL (Pillow) package which I knew was in system-site-packages. None worked. I was about to give up for the night when I happened to notice the venv/pyvenv.cfg file under my project in the Project Explorer window. I found the line "include-system-site-packages = false" in that file and so I changed it to "true". Problem solved.

In my PyCharm 2019.3, select the project, then File ---> Settings, then Project: YourProjectName, in 'Project Interpreter', click the interpreter or settings, ---> Show all... ---> Select the current interpreter ---> Show paths for the selected interpreter ---> then click 'Add' to add your library, in my case, it is a wheel package

For me there is also another issue. If you try to add a folder that in the past had a .idea folder, but your current project has it's own .idea folder your pycharm might get confused for some reason -- even if you have the right python/conda env. For me deleting the .idea folder of the other project fixed the confusion that it could find the obviously correctly installed pkgs. Then it was it was able to find them in the pycharm editor GUI snf stopped underlyinging them in red.

Download anaconda
https://anaconda.org/
once done installing anaconda...
Go into Settings -> Project Settings -> Project Interpreter.
Then navigate to the "Paths" tab and search for /anaconda/bin/python
click apply

Add directory to Python path in PyCharm?

I want to be able to use the paraview.simple library in PyCharm. I already have paraview installed in my computer. This package cannot be installed with pip and there are no .whl files as far as I can tell. The website docs recommend that the directory containing all the python files be added to PYTHONPATH.
How do I add the relevant folder in PYTHONPATH on my PyCharm session, and keep it there by default, such that when I close out and reopen the paraview.simple library is still available?

You can add custom paths this way.
Go to File->Settings->project Interpreter
In the Project-Interpreter field, click the down facing arrow and select "show All"
In that Menu, highlight your interpreter and then in the right menu, select the button "Show paths for the selected interpreter" (this is the last button)
click the plus symbol to add your path

Adding interpreter paths in PyCharm:
Project Settings/Project Interpreter: select "settings" icon
Project Interpreters: select "tree" icon
Interpreter Paths: select "plus" icon

In PyCharm version 2020.3.1 use the following workflow instead (see official docs):
Ctrl+Alt+S - open Settings.
File|Settings|Project|Project Structure...
You will see project folder structure. Mark subfolders as Sources or Excluded

Use anaconda with Pycharm
To install paraview with anaconda run the following command: conda install -c conda-forge paraview
If conda command is not recognized then register the Anaconda path to environment variable
Now open pycharm and give the configuration path as the Anaconda path
File -> Settings -> Project Interpreter
In Project Interpreter give similar path : "C:\Users\username\Anaconda3\python.exe"

For me this solved it: mapping the local path to the remote inside the Pycharm run configurations settings.
Edit Configurations > Path Mappings >
Local path = /<Users/me/pycharm etc.../project root>
remote path = /
eg.

Can I setup project interpreter from .tox folder

The 'tox' interpreter is in the '.tox' folder, after executing command tox.
Are there any ways to set that interpreter to the PyCharm?

UPDATE: today this is made very easy with the PyVenvManage Plugin which provides a context menu entry to directly activate any virtualenv in .tox.
Yes that's possible. You open up Settings -> Project Interpreter -> Add local and choose the python binary you want to use. It does not matter if it lives in a .tox folder or somewhere else.
Also see pycharm help.

PyCharm cannot find the packages in virtualenv

I have the latest PyCharm CE and am using it with virtualenv. I have defined the interpreter as the interpreter in the virtualenv. The Project Interpreter window in PyCharm lists all the packages I have installed. I confirmed this by running pip freeze > requirements.txt and running through the packages manually.
My problem is that PyCharm won't find certain includes in its editor windows, like Flask-Login:
In from flask.ext.login import current_user, login_user, logout_user, login_required the includes current_user, login_user, logout_user, login_required are all marked as unresolved references.
Am I missing something?

The problem may lay in PyCharm picking up faulty 'Interpreter Paths' for your virtual environment. Go here:
PyCharm (menu) -> Preferences (Menu option)
-> Project: <name> (Dropdown)
-> Project Interpreter (Menu option)
-> 'Settings' button (Looks like a gear)
-> More (Menu option)
-> Select your virtualenv interpreter
-> Click 'Show paths for interpreter' button (on bottom of list window)
Now that you're in this (admittedly tortuously found) location, you should see paths being used by this interpreter. If my theory is correct, these are pointing to global system locations. To add the virtual environment paths, you should click the + button and add corresponding paths that exist inside your virtual environment. Once you're done with this, it's a good idea to select the global system paths and click - to remove them. Click apply, and go to File -> Invalidate caches / Restart to reload PyCharm.
This should get your interpreter to be pointed to the correct location for the libraries you've installed into your virtualenv, and you should no longer be getting the import error. Note that even with this fix you will not see your libraries under the Project Interpreter, but they should be being loaded.

In the newest version of PyCharm (2016.1.4 in my case):
Settings
Project: name of project
project Interpreter
at the right side there will be a dropdown where you can choose the interpreter. There should be venv options.
See image below for better explanation (like they said, 1 picture worth thousands word)

I was also facing the same issue (includes are still not being found) even after Nathaniel Ford and dieend's correct suggestion. Make sure that your run/debug configuration as correct python interpreter selected:

I noticed that every time I open a different project it still has the venv from the project I was previously working on.
What I do is:
ctrl-alt-s (to go into preferences), then Project Interpreter/settings (gear icon), show all, then remove all the venv environments that aren't your current project (use the - sign). Restart, and you should be good to go.

Also note the accepted answer is no longer applicable to PyCharm menu structure. It is now File > Settings > Project > Project Interpreter > Gear Icon > Show All
The following steps detail the "nuclear" option:
Delete your project virtual environment directory (e.g. /venv)
Delete all other interpreters listed in menu option accessible by the route listed at the top of this post.
Close PyCharm
Delete the .idea directory in your project folder
Restart PyCharm, opening the project folder.
Go through the process of configuring a new interpreter.
That will pretty much get you starting from scratch.

Open up Preferences -> Project -> Project Interpreter, do you see the module there?
If yes, you might have another file somewhere in your project have the same name as flask.ext.login, this prevents pycharm from locating the actual module.
If no, you can click on the ... beside your interpreter and select more..., select your interpreter and at the bottom (beside the filter), click the Show paths for the selected interpreter, you can add the path of your module there.

For me, the easiest solution was to open the project in the root directory (my project has a server and client directories, thus the root directory contained both of them). When you open the project in the root directory, it is able to find the dependencies without messing with pycharm settings as it uses them by convention.

My two cents on this topic as I struggled myself with it recently.
Nathaniel Ford's answer is the good one except that this part:
-> Select your virtualenv interpreter
was unclear to me.
I tried several times with
~/.virtualenvs/python-audition-2.9/bin/python
whereas it only worked with
~/.virtualenvs/python-audition-2.9/local/bin/python
Notice the .../local/... in the latter path? It was really important in my case. And don't forget to File -> Invalidate caches / Restart to reload PyCharm.

Adding the lib directory in my virtual environment to sources in the PyCharm CE settings helped me.
My steps:
Preferences -> Project: -> Project Structure
Scrin1
Select the directory where you installed the libraries. In my case, this is "lib".
Mark the directory as "source".
Scrin2
After these actions, all my libraries were correctly imported into the py files I needed.

Easy solution: (PyCharm 2022.2.3) and Python 3.11.0 on Win11:
Create new venv Environment for the project, DO NOT inherit site-packages
Check, if jupyter-server uses new venv (Settings->Language&Frameworks->Jupyter->Jupyter Server)
Install all required packages (inbcluding jupyter!) to venv (e.g., requirements.txt and PyCharm)
Worked fine for me.

Goto /venv/bin/ and check all activate scripts. You venv path might be wrong.

I was not able to assign existing virtual environment to my project, but after going to
File -> Settings -> project interpreter-> show all-> click on '+'
to create a new virtual environment or we can choose the existing virtual environment, I am able to assign and use the existing virtual enviroments.

PyCharm doesn't recognize my Python installation path

This is the same question as this else but for Python.
The thing is that I've built my own installer package of Python interpreter (I've added modules and extras) and once installed I can't find the way to set the location of my custom Python installation dir in PyCharm IDE, I can't find any option to manually specify the location of python interpreter.
While I don't know if exist that option I'm thinking in other alternative, If maybe the PyCharm IDE takes the original Python path from a registry value then it should be sufficient for set the location, but I don't know if pycharm uses a config file or a reg key to get the python location and where is this value to modify it, I need help.
PS: I'm having the same problem for RubyMine IDE.

For PyCharm, in the IDE go to File -> Settings. In the Project Settings navigation panel, select Project Interpreter and then Python Interpreters, then in the right panel, click on the green plus (+) icon on the top right and select local. Navigate to the python executable you would like to specify as your interpreter.

You can also try this:
click on File
select Settings from the menu
in new Settings window click on Project and then Python interpreter
click on gear icon on the right, then on Add... option
in the Add python interpreter window select System interpreter from the list on the left
pick Python, click apply and you are done

I was having similar problems with PyCharm.
Having installed both Python 2.7 and 3.5 I was only able to find the the "python.exe" file for python 2.7.
I tried reinstalling Python 3.5 and attempting to change the installation path to C:// but it lead to several errors. This is the work around I found for getting 3.5 on PyCharm as an interpreter.
Copy the python 3.5 directory in windows explorer.
Paste it into PyCharms choose local interpreter area.