New to python and I cannot import modules that I have installed via pip.
For instance, I have installed numpy though cannot import it.
I have a feeling from trying to work this out that it is installing to the wrong directory, or I am calling the wrong version.
$ which python
returns
/usr/bin/python
I am just not sure how to change it so I can access the modules.
First if all, you are installing the packages using pip, which means you install it on python 2 by the default configurations.
The issue you are describing can be caused by several problems:
If you are working with an IDE like pycharm- your project interpeter might by python 3.x. You should change it to python 2 since you used pip and not pip3.
Some newer versions of pycharm are opening virtual environment by default in new projects. This means that if you install packages outside the virtual environment you will not be able to access them. When opening a project, intended of applying the default settings, change the interpreter to your system interpreter, probably your python2.7 in your case.
You are not using an IDE but accecing python from your terminal like so: python3 instead of python.
Hope it helps ;)
From a terminal try:
pip install numpy --user
This install numpy to your home directory. Sometimes this helps compared with installing it without the '--user' flag.
Then:
python
Now you have a python command line. Try:
import numpy
If you don't see any error message, then the install worked. Control-d or typing 'exit()' returns you to your shell.
Related
I have requests module installed but it shows an error when running .py file from cmd prompt.
There are no errors when running the file from vscode.
It seems that requests is installed in your virtual enviroment "my_env" but you must execute your script using the intepreter of your virtual enviroment (It seems that windows keep using the base interpreter even if you activated the virtual env). Try calling it directly, for example
"Your_path_to_venv\Scripts\python.exe" main.py
This issue can be caused by multiple issues.
Wrong pip version is in path (Caused by installing a newer version of python, while an older version was already there.
This can be fixed by simply removing the old python from PATH and restarting the command line.
Try using pip3 instead of pip maybe pip installs libraries in a different dictionary than pip3 does
If that didn't work then use
python -m pip install “your library”
And if you were using python3 just do the same
python3 -m pip install ”your library”
If they did not work too, replace pip in the last two commands with pip3
And if it still does not work first see the path of the python site-packages files by running this python code
import os
import inspect
print(os.path.dirname(inspect.getfile(inspect))+"/site-packages")
a path will be printed, take it and add it as a parameter to your pip command
pip install -t “the printed path”
Ok, I see that you probably have a script called requests.py in your C:\Users\BokaBu>pyproj\my_env\Scripts\activate folder, but your question is how can C:\Users\BokaBu>pyproj\src\main.py find it.
The solution is to add C:\Users\BokaBu>pyproj\my_env\Scripts\activate to PYTHONPATH. The solution to the general version of your question can be found here:
Importing files from different folder - Stackoverflow
But in more detail, you may want to try this to your C:\Users\BokaBu>pyproj\src\main.py:
# In C:\Users\BokaBu>pyproj\src\main.py
import sys
# insert at 1, 0 is the script path (or '' in REPL)
sys.path.insert(1, 'C:\Users\BokaBu>pyproj\my_env\Scripts\activate')
import requests
Hope it helps~
im very new in programming and i learn Python.
I'm coding on mac btw.
I'd like to know how can i import some modules in VS code.
For exemple, if i want to use the speedtest module i have to download it (what i did) and then import it to my code. But it never worked and i always have the error no module etc.
I used pip to install each package, i have them on my computer but i really don't know to import them on VS code. Even with the terminal of the IDE.
I know it must be something very common for u guys but i will help me a lot.
Thx
Quick Summary
This might not be an issue with VS Code.
Problem: The folder to which pip3 installs your packages is not on your $PATH.
Fix: Go to /Applications/Python 3.8 in Finder, and run the Update Shell Profile.command script. Also, if you are using pip install <package>, instead of pip3 install <package> that might be your problem.
Details
Your Mac looks for installed packages in several different folders on your Mac. The list of folders it searches is stored in an environment variable called $PATH. Paths like /Library/Frameworks/Python.framework/Versions/3.8/bin should be in the $PATH environment variable, since that's where pip3 installs all packages.
Most probably you have multiple versions of python on your computer.
You have to select your python interpreter for which you have installed those packages using pip to do this you'll have to click on the python version you see in the bottom and select the correct interpreter from the list:
You can also find more information within the VSCode docs.
I am working on several projects on the same PyCharm. Like I "attached" them all together. But I recently noticed some weird behaviors. Like when I import a library I haven't installed yet to my script. It shows me a little error as expected. But when I try to install that using python -m pip install my_library, it tells me that it has already installed. I recently noticed that this is because it's using and other pip from another project. I doesn't use the one in the venv folder in the project. Also to run the scripts sometimes it uses python.exe from pythons original directory. It's a whole mess and I have no idea how I can solve it. Sometimes my projects requires different versions of the same library and you can imagine what happens when I change the version.
I make sure each project is using their own interpreter. Don't know what else to do other than this. I am using Python3.6.4 PyCharm2018.3.2 running on Windows10
it sounds like all your projects are configured to use the system's interpreter instead of the virtual environment you set up for each of them.
Follow this instruction to fix it https://www.jetbrains.com/help/pycharm-edu/creating-virtual-environment.html
In terms of using different version of the python library, you can address that by specifying it in requirements.txt file, which you can put in your venv folder for each project. then you can just do pip install -r requirements.txt after you set up your venv. (you need to ensure that the venv is activated - you don't need to worry about this if you have configured the project in PyCharm to use the venv's python interpreter.) You can check this by going to Terminal in your PyCharm and you should see (venv_name) hostusername#host:~/project_folder$
this is my first time here, and I'm fairly new to python, so please let me know if you need more information. Thanks in advance.
I am running python 3 on Windows 7
I discovered my problem after I used pip install numpy. This works just fine. Then, when I try to use import numpy in the python shell I receive the ModuleNotFoundError: No module named 'numpy'. That's when I noticed that my default version of python was 3.6.1, despite having updated to 3.6.2 at some point. I still have both .exe setup files and when I run them it shows that I only have 3.6.2 installed. However, when I type python --version in the command line i get Python 3.6.1, even though Python36-32 is what i have in my path.
I think my question is how can I make sure I'm running the newer version of python as my default, or if need be, how can I get rid of the older version?
When you type python in cmd, it searches python command inside the directories in the environment variable named Path. Actually Path includes both python directory and python scripts directory. For example, in my computer, Path includes:
C:\Users\user\AppData\Local\Programs\Python\Python36
C:\Users\user\AppData\Local\Programs\Python\Python36\Scripts
pip is in the python scripts directory. Your Path can be wrong. You should check it. This link can help you. You should have one python directory and one python script directory in Path, just the version you need.
Also, you can call pip as a module:
python -m pip install numpy
This will install the package to the version which is in the Path, Python 3.6.2 in your situation.
If none of these works, I recommend you to uninstall(delete) Python 3.6.1, and try to use pip again. If pip doesn't work(or disappeares), you can read this or use get-pip.py to install pip to your computer again. Maybe, you can delete all python versions, and install the version you need, and of course, you should be careful about Path again.
EDIT:
I am not sure about your problem. Some informations are needed for a certain solution.
You can find the source of an executable(python or py in your situtation) with where command. Here is an example from my local:
where python
Output:
C:\Users\user\AppData\Local\Programs\Python\Python36-32\python.exe
That means C:\Users\user\AppData\Local\Programs\Python\Python36-32\ directory is in my Path and when type python, cmd runs python.exe.
So, you can find out what are py and python exactly.
In my Ubuntu16.04, there are python 2 and python 3 default. In addition, i have installed anaconda too. I am sucked by the 'python' cmd. Every time i use pip or pip3 install, I don't know where the package install, python2 or python 3? And I use conda install to install anaconda package. I also use anaconda env to manage different virtual env. But I think it mix with my local Python 2 and 3.
For example, in directory /usr/bin, I found many soft links like this:
When i try 'python' cmd, it just confuse me！
Why python3m are local, shouldn't it be anaconda? Why python3 are anaconda, shouldn't it be local? Then I found that if I use ./python2 or ./python3, I found it is correct now!
So I know it is caused by environment variables. I echo $PATH, Found it like this: /home/kinny/.pyenv/shims:/home/kinny/.pyenv/bin:/home/kinny/anaconda3/bin:/home/kinny/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/opt/ant/bin:/snap/bin:/opt/maven/bin:/usr/lib/jvm/java-8-oracle/bin
I have used update-alternative --config python to configure default python, but it doesn't work! It sames mixed with each others.
Now I just want to install tensorflow 0.11 in local python3, because in anaconda it is 0.10 version by default. So how can I change this. I just want to use python python3 and python3m represents python2.7 python3.5 and anaconda python respectively, How can I do that! use pip and pip3 for local python2 and python3 respectively!
I ran into a similiar problem when setting up PyCharm Edu to work with Anaconda. I found that I had several versions of Python installed and it was very hard to keep track of which version the IDE was referencing. My CS professor gave me the advice of simply removing the versions of Python I didn't frequent. I now just have Anaconda installed; and use the Anaconda Prompt as my Python console. I also rely on PyCharm's IPython for the developer console. However, if you still want differing versions of Python installed (say your doing QA testing for older devices); there is the really helpful command: which python. When entered into the python console or Anaconda Prompt: which python will display the directory associated with the currently executing Python Shell. This enables you to better keep track of to what particular python.exe the current window is referring to.
Follow up to the comments mentioning using virtualenv and virtualenvwrapper.
Here are the official docs and a good blog post to follow for getting started using virtualenv's is here:
https://virtualenv.pypa.io/en/stable/installation/
http://virtualenvwrapper.readthedocs.io/en/latest/install.html
http://exponential.io/blog/2015/02/10/install-virtualenv-and-virtualenvwrapper-on-ubuntu/
Also, once you are setup you can create virtualenv's specifying which python installation you want to use.
which python3
returns
/usr/bin/python3
Then create a virtualenv with that python path. Where example_env is the name of the virtualenv.
mkvirtualenv -p /usr/bin/python3 example_env
Then activate the virtualenv using virtualenvwrapper.
workon example_env
Finally, install tensorflow and other dependencies with pip.
pip install tensorflow
the which command is very useful for finding the path to the executable that is first in your path. Zsh also has the where command, which will show you all instances of the given executable that show up in your path. For managing different python versions, you have a lot of options. The easiest for most people tends to be anaconda, using conda environments. The installer will ask you to add some stuff to your .bashrc file, which will then make anaconda's binaries come first in your path. Anything else you run after the .bashrc gets sourced after that, will then use that first, including PyCharm. For graphical desktop apps to pick up the change, you may need to log out and back in again. If you only need one version each of python 2 and python 3, you can just use the ones available via apt. Depending on your Ubuntu version, Python 2 is definitely installed by default as it is used by many system utilities, including apt itself. Some newer versions may also install python 3 by default, but I do not remember for sure. Another option is to install the versions of python you need in an alternate location, such as /opt/python/<version> and then using environment-modules (installed via apt install environment-modules) or Lmod to control which versions are being used, but that may or may not be easy/convenient to use with a desktop application such as PyCharm.
for TensorFlow, 1.11 is available in anaconda, but I don't remember if it's in the default channel or not.