I am currently practicing matplotlib. This is the first example I practice.
#!/usr/bin/python
import matplotlib.pyplot as plt
radius = [1.0, 2.0, 3.0, 4.0]
area = [3.14159, 12.56636, 28.27431, 50.26544]
plt.plot(radius, area)
plt.show()
When I run this script with python ./plot_test.py, it shows plot correctly. However, I run it by itself, ./plot_test.py, it throws the followings:
Traceback (most recent call last):
File "./plot_test.py", line 3, in <module>
import matplotlib.pyplot as plt
ImportError: No module named matplotlib.pyplot
Does python look for matplotlib in different locations?
The environment is:
Mac OS X 10.8.4 64bit
built-in python 2.7
numpy, scipy, matplotlib is installed with:
sudo port install py27-numpy py27-scipy py27-matplotlib \
py27-ipython +notebook py27-pandas py27-sympy py27-nose
pip will make your life easy!
Step 1: Install pip - Check if you have pip already simply by writing pip in the python console. If you don't have pip, get a python script called get-pip.py , via here: https://pip.pypa.io/en/latest/installing.html or directly here: https://bootstrap.pypa.io/get-pip.py (You may have to use Save As ..)
Step 2: Take note of where the file got saved and cd the directory from command prompt. Run the get-pip.py script to install pip.
You can write in cmd this line within quotes: "python .\get-pip.py"
Step 3: Now in cmd type: pip install matplotlib
And you should be through.
You have two pythons installed on your machine, one is the standard python that comes with Mac OSX and the second is the one you installed with ports (this is the one that has matplotlib installed in its library, the one that comes with macosx does not).
/usr/bin/python
Is the standard mac python and since it doesn't have matplotlib you should always start your script with the one installed with ports.
If python your_script.py works then change the #! to:
#!/usr/bin/env python
Or put the full path to the python interpreter that has the matplotlib installed in its library.
If you are using Python 2, just run
sudo apt-get install python-matplotlib
The best way to get matplotlib is :
pip install matplotlib
cause the previous way may give you a old version of matplotlib
This worked for me, inspired by Sheetal Kaul
pip uninstall matplotlib
python3 -m pip install matplotlib
I knew it installed in the wrong place when this worked:
python2.7
import matplotlib
use pip3 install matplotlib to install matlplot lib.
By default, pip will install those package for 2.7 as it the native one.
using pip3 makes it specific for python 3, and make sure you have only one version of python 3
First check the version of Python
For python2:
sudo apt-get install python-matplotlib
For python3:
sudo apt-get install python3-matplotlib
If you mismatch the Matplotlib installation and the Python version you will get the no-module-error because no module for that version exits.
If you using Anaconda3
Just put
conda install -c conda-forge matplotlib
You can install the matplotlib package in python 3 by doing this
python3 -m pip install matplotlib --user
It's working for me.
If you have pip installed and Python configured to the path variables, Just run this command in the terminal.
pip install matplotlib
So I used python3 -m pip install matplotlib then import matplotlib.pyplot as plt and it worked.
I had a similar problem, using pip3 and all these things worked for installing matplotlib but not pyplot. This solved it for me:
import matplotlib as plt
from matplotlib import pyplot as pllt
I had a similar issue that I resolved and here is my issue:
I set everything up on python3 but I was using python to call my file for example:
I was typing "python mnist.py" ...since I have everything on python3 it was thinking I was trying to use python 2.7
The correction:
"python3 mnist.py" - the 3 made all the difference
I'm by no means an expert in python or pip, but there is definitely a difference between pip and pip3 (pip is tied to python 2.7) (pip3 is tied to python 3.6)
so when installing for 2.7 do: pip install
when installing for 3.6 do: pip3 install
and when running your code for 2.7 do: python
when running your code for 3.6 do: python3
I hope this helps someone!
I bashed my head on this for hours until I thought about checking my .bash_profile. I didn't have a path listed for python3 so I added the following code:
# Setting PATH for Python 3.6
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.6/bin:${PATH}"
export PATH
And then re-installed matplotlib with sudo pip3 install matplotlib. All is working beautifully now.
The file permissions on my virtual environment directory and my project directory were not correct and, thus, would not allow me to install the proper packages. I upadated them by running:
sudo chown user:user -R [project folder]
sudo chown user:user -R [environment folder]
In the above your should use your own usernames in place of "user". The -R recurses through all subfolders and files.
Working on the django project and faced same problem,
This is what I did.
Check if you have matplotlib already simply by writing pip show matplotlib in the python terminal.
If dont, run the command pip install matplotlib.(make sure you have pip downloaded)
Run the command pip show matplotlib again.
If the library is successfully downloaded, you can run your project (py manage.py runserver)
If you are in a venv, don't install these libs within the venv.
Installing them from outside helped me.
For me, with PyCharm and Python 3.8 on WIN10 environment, the solution was inside the IDE of PyCharm itself.
From the IDE and Project Setting (the gear on the top right corner), I've chosen Settings -->Project:Python-->Python Interpreter and you can see all the packages installed (and matplotlib wasn't present in the Package list).
Click on the + icon in the upper left corner for Package installation, and next will be opening a new window with the available packages for PyCharm. In the find box was sufficient to type matplotlib, select it and click on Install Package.
Here a screen-shot of PyCharm environment (as requested on 21/08/2021) :
If you experienced this error ModuleNotFoundError: No module named 'matplotlib' while using venv and running pytest like me, you can check by comparing the path type pytest shows and the path type python shows. In my case pytest wasn't under venv/bin directory like python, I installed pytest by pip and reactivated venv. See https://stackoverflow.com/a/54597424/3622415
I have installed matplotlib using both pip and conda but experienced this error ModuleNotFoundError: No module named 'matplotlib' .
I fix by following.
Because It might have an old version of Jupyter notebook, so i try this command to install it in the current kernel.
import sys
!{sys.executable} -m pip install seaborn
In the New Jupyter version (2019) can be installed simply as:
%pip install matplotlib
I solved by conda. Once installed miniconda or anaconda, type
conda install matplotlib
then, when prompted, type
y
in sublime text you can set
"cmd": ["python3", "-u", "$file"]
in tools > buildsystem > new build system
it worked for me
I am trying to create a new virtual environment for a tutorial. I have installed virtualenv and virtualenvwrapper multiple times but every time I try creating a new virtual environment my terminal displays - mkvirtualenv: command not found. When I try finding out the version of virtualenv it shows virtualenv: command not found. Something similar was happening with my pip installation as well but then it got resolved when I used some command.
I would like to point out that my PATH seems to be really messed up. The PATH is pointing to /Library/Frameworks/Python.framework/Versions/3.8/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin. Please help.
I saw something else when I use pip show virtualenv it gives me details of the version and the author but when I use virtualenv --version it sends a virtualenv: command not found.
First of all, you will need to install virtualenv as it is a python 2 external dependency.
pip install virtualenv
this will allow you to use virtualenv globally.
Alternatively, you can use from Python 3.5+
python -m virtualenv venv
However if you dont wish to support python 2 you can use venv which is installed on from python 3.3
python3 -v venv venv
Took quite some time to figure it out but what worked for me was to install it using pip3 install instead of pip install
pip3 install virtualenv
I am new to python and I'm following a tutorial using python3. I installed plotly and I can see it in the pip list and pip3 list and python help("modules"). However, when I tried to import the module (from plotly import offline) I got the error:
ModuleNotFoundError: No module named 'plotly'.
Tried to reinstall but it did not work.
I can import other modules in the list, like pygame or matplotlib without a problem.
It is usually a good idea to create a virtual environment to install additional modules. This will create a sealed Python environment with only the packages you specify. This usually fixes such errors, as Python sometimes installs packages where they can later not be found anymore. It is also a good idea to not use pip, as it might point to a pip from a different python version. Also it makes sense to upgrade pip before installing packages.
Try the following:
python3 -m venv env
. env/bin/activate (on Linux)
.\env\Scripts\activate (on Windows)
Check which packages we have:
python -m freeze
Here make sure this does not show anything except pkg-resources==0.0.0. Otherwise your PYTHONPATH might be mesed up.
Upgrade pip and install your package:
python -m pip install --upgrade pip
python -m pip install plotly
Run python and import your package:
python
>>> import plotly
If I typ this:
pip install plotly
in a CMD and this:
>>> from plotly import offline
In the interpreter it workes fine,
try uninstalling and reinstalling plotly:
pip uninstall plotly
Enter
y when it says Proceed (y/n)?
And install again with
pip install plotly
I had the same problem; after uninstalling/installing plotly, use venv, I realised (after 2h) that my script name was "plotly.py" => that was the cause of the error
I have a MacBook Pro that came pre-installed with python2.7. I later installed python3 and ipython notebook. I installed pip too to install packages, and am able to install packages and run program from python3. However, for another project I need to run code in python2.7, and I am not sure how to install it in python2.7 folder.
I tried using pip for installing packages to 2.7, but it kept giving error saying package already exists. When I check for version of python using --version, I see 2 pythons installed. However, when I check for pip and pip3, both seem to be in th same folder.
Any tips on how to install packages in python2.7, without making any changes to 3.3? I am using python3 and ipython notebooks for another project.
viveks-mbp:~ vivekyadav$ which pip
/Library/Frameworks/Python.framework/Versions/3.3/bin/pip
viveks-mbp:~ vivekyadav$ which pip3
/Library/Frameworks/Python.framework/Versions/3.3/bin/pip3
viveks-mbp:~ vivekyadav$ which python
/usr/bin/python
viveks-mbp:~ vivekyadav$ which python3
/Library/Frameworks/Python.framework/Versions/3.3/bin/python3
You can use the virtualenv to create a kind of sandbox.
$ virtualenv <work-directory>
$ source <work-directory>/bin/activate
The last command initiate your virtual environment, totally isolated from the system. So every pip command will install the package inside this directory.
But you have to run your application inside the virtual environment too.
I recently installed python 2.7.2 on my Mac running OSX 10.6.8. Previously, I had version 2.6. I set my path in .bash_profile as follows:
export PATH=/usr/local/bin:$PATH
export PATH=/usr/local/share/python:$PATH
so that when I run python it will refer to my new installation. It does.
I would also like to use pip with my new installation, but the problem is that I already have the current version of pip installed at
/usr/local/bin/pip.
I tried to re-install pip with:
easy_install pip
But, of course this does not put pip in the desired new directory
/usr/local/share/python/pip
but simply refers to the existing version in /usr/local/bin/pip.
Can someone tell me how to fix this?
I would like to then use pip to install NumPy and SciPy in the correct directory (I was having trouble getting the SciPy installation to work with my old version of python, hence the new install).
If you'd like, you can visit the website where I found instructions for installing python 2.7, creating/updating my .bash_profile, installing pip, and NumPy and SciPy. Might provide some insight, or I'm happy to give more details if needed. Thanks!
http://www.thisisthegreenroom.com/2011/installing-python-numpy-scipy-matplotlib-and-ipython-on-lion/#python
Install distribute as per the instructions at http://pypi.python.org/pypi/distribute .
Make sure you specify the full path to the python executable (/usr/local/share/python/python or smth in your case).
$ curl -O https://svn.apache.org/repos/asf/oodt/tools/oodtsite.publisher/trunk/distribute_setup.py
$ /usr/local/share/python/python distribute_setup.py
Then you should have /usr/local/share/python/easy_install.
After that, run:
$ /usr/local/share/python/easy_install pip
Then you should have /usr/local/share/python/pip.
Depending on the ordering of things in your PATH, either your old, or the newly installed pip is executed when you execute the pip command, so you either might have to adapt your PATH, or specify the full path to /usr/local/share/python/pip when installing eggs.
(shameless plug:
In any case, you might consider using virtualenv for installing packages into a "project" specific isolated environment, as opposed to installing them globally.)
I needed to uninstall brew's python.
Then, I was left with python v2.7.6
Next to install, pip I ran
sudo easy_install pip
installed fine and working
I had a similar issue, try this:
$ python -m pip install --upgrade --force-reinstall pip
This will force reinstall pip with whatever version of python you use including installing the binary.
A few days ago I had a friend who was starting Python Programming and needed help with the same issue: installing pip. There are debates over which one to choose between easy_install and pip and it seems everybody is heading the pip direction. Either way, installing either of them can be frustrating.
You can use this simple tutorial : installing pip package manager the easy way
Here are what you should keep in mind as you follow the above guide:
If you already have an older version installed, uninstall it or totally remove the python installation
Once that is cleared, download an install Python.
After that, download ez_setup.py file and save it to your desktop - easily accessible from the command line
Now run it from the command line and it will install easy_install for you after which,
You can use it to install pip.
Once again, you can do this or use the above link to find a simple step-by-step guide on how to get it installed on your computer.
Good luck.
Just so that people knew, ATM we can install PIP by downloading get-pip.py from the page with docs and run it like this:
c:\python27\python.exe get-pip.py
BTW, Python 3.4 comes with PIP pre-installed.
One of the command line options lets you choose where to install to.
--install-dir (-d) install package to DIR
So something like - # easy_install pip -d /usr/local/share/python
(Please correct me if I'm wrong.)
Just wanted to say that I found a way to get around my problem. I don't know that I can explain it perfectly, since I am not very good at understanding what I am doing with this stuff just yet! But, the problem seems to have been with my PATH. I removed the PATH that I posted in my original question, and then used easy_install pip. It went straight to python 2.7.2 (my new version) with no problem. I then successfully used pip to install NumPy and SciPy in the correct location, and they both work. Thanks to ErikAllik and FakeRainBrigand for taking the time to look into it!