I've installed appium on my system and use:
from appium import webdriver
by python3.6.
but in other code when I use it by python3.8 return me:
ModuleNotFoundError: No module named 'appium'
what's the problem with this error?!
The basic crux of the problem is that those 2 python versions are not accessing the same location of installed pip modules. Try using the python -m pip install SomePackage method to call pip of specific Python Binary.
This snippet will help.
python38 -m pip install Appium-Python-Client
Not sure, how you manage those versions of python, but the basic gist of invoking specific pip version works.
Try whereis pip or which pip to ensure the correct pip is being called.
Related
I am on a MAC OS 10.15.6
I am having a tough time with virtualenv for python3.
The error I keep getting
ModuleNotFoundError: No module named 'virtualenv.seed.via_app_data'
It pops up when I run the following command (among others)
python3 -m virtualenv
What I have tried
Pip installing virtualenv with sudo
Regular pip install, normal permissions
Using the pip install --user option
Trying older versions of virtualenv (20.0.23)
Trying newer version of virtualenv (20.0.31)
Any leads are appreciated.
Exactly same problem!
I uninstalled virtualenv, and now it works!
pip uninstall virtualenv
I don't know why
Maybe python now comes with a built-in version of virtualenv?
I'm on python 3.8
When installing python modules, I seem to have two possible command line commands to do so.
pip install {module}
and
py -{version} -m pip install {module}
I suppose this can be helpful for selecting which version of python has installed which modules? But there's rarely a case where I wouldn't want a module installed for all possible versions.
Also the former method seems to have a pesky habit of being out-of-date no matter how many times I call:
pip install pip --upgrade
So are these separate? Does the former just call the latest version of the latter?
TLDR: Prefer ... -m pip to always install modules for a specific Python version/environment.
The pip command executes the equivalent of ... -m pip. However, bare pip does not allow to select which Python version/environment to install to – the first match in your executable search path is selected. This may be the most recent Python installation, a virtual environment, or any other Python installation.
Use the ... -m pip variant in order to select the Python version/environment for which to install a module.
So the pip install module is callable if you have already installed the pip. The pip install pip --upgrade upgrades the pip and if you replace the pip into a module name it will upgrade that module to the most recent one. the py -{version} -m pip install {module} is callable if you have installed many versions of python - for example most of the Linux servers got installed python 2, so when you install the Python 3, and you want to install a module to version 3, you will have to call that command.
I'm trying to test if requests module has been well installed. But I'm getting the following error :
raceback (most recent call last):
File "/Users/macbookpro/Desktop/test.py", line 1, in <module>
import requests
ImportError: No module named requests
when trying to run the following test script:
import requests
print 'test'
But I have installed requests with pip, and pip list command gives the following result :
MBPdeMacBook2:~ macbookpro$ pip list
arrow (0.7.0)
beautifulsoup4 (4.4.1)
classifier (1.6.5)
coursera-dl (0.6.1)
Django (1.8.6)
html5lib (1.0b8)
keyring (9.0)
lxml (3.6.0)
Pillow (3.4.2)
pip (8.0.2)
pyasn1 (0.1.9)
requests (2.14.2)
setuptools (19.4)
six (1.10.0)
urllib3 (1.16)
vboxapi (1.0)
virtualenv (13.1.2)
wheel (0.26.0)
Why requests isn't being imported ?
EDIT :
MBPdeMacBook2:~ macbookpro$ which python
/Library/Frameworks/Python.framework/Versions/2.7/bin/python
MBPdeMacBook2:~ macbookpro$ which pip
/usr/local/bin/pip
MBPdeMacBook2:~ macbookpro$ python --version
Python 2.7.11
MBPdeMacBook2:~ macbookpro$ pip --version
pip 8.0.2 from /usr/local/lib/python2.7/site-packages (python 2.7)
In general, you should get into the habit of working in a virtualenv. I find the documentation here to be helpful.
If you install all of your dependencies within the virtual environment, you'll be (mostly) sure that you are installing those deps. in the same environment that you're running the jobs in.
For your case, on the command line go to the directory where your code lives and run
pip install virtualenv
virtualenv my_project
source my_project/bin/activate
Now that the virtualenv is active you can
pip install requests
Only what is installed in the virtualenv will be available. This will keep your system clean. Each project should get its own virtualenv, meaning only the dependencies needed for each project will be available to them. This way you could, say, have version 1 of some dependency installed for one project and version 2 for another. They won't come into conflict.
After you have installed all the dependencies, run
pip freeze > requirements.txt
To get a list of all the dependencies for the project saved. Next time you need to install these, you simply run
pip install -r requirements.txt
Once you are done working in the virtualenv, run
deactivate
I am not 100% sure, but the paths from which python and which pip may indicate that you have two versions installed. The Python version being the old one that was shipped with OS X, and another version.
I would advice you to install Python27 (or even better Python3) from brew.
You can install brew with a single command, and another one for installing Python27/3. When this is done you set the PATH variable in your shell rc file and you should be good to go.
I have Python27 installed (via brew) and my (working environment) reports the following paths:
which python: /usr/local/bin/python
which pip: /usr/local/bin/pip
And
python --version: 2.7.15
pip --version: pip 9.0.1 from /usr/local/lib/python2.7/site-packages (python2.7)
I experienced this same issue on Ubuntu 18.04 LTS, to check that, I first checked if requests library was installed on my system or not.
Run these commands on your terminal inside the virtual environment in which you working
$ python
Then the python command line opens, then run
>>> import requests
After this if you get an ImportError saying, No module named requests, then it means the dependency has not been installed properly. If there is no such error, then it means the dependency is installed successfully.
This can occur for example if pip is actually pip3 and python is actually python2.7.
In your case the which pip and which python eliminate this possibility but it just happened to me.
The solution was to do pip2 instead of pip; if the situation was reversed you can use pip3.
Simply go inside your virtual environment and run below commands:
1). pip install --user pipenv
2). pipenv install requests
after executing the above commands cd to your app folder inside the virtual environment and just run it. Hopefully now it will run.
Reference link: https://python-guide-pt-br.readthedocs.io/pt_BR/latest/dev/virtualenvs.html#make-sure-you-ve-got-python-pip
I'm trying to follow the tutorial on here: http://pythonhosted.org/airflow/tutorial.html
but i'm using a mac, and so i had to install python via brew, which then comes with pip, which i used to install airflow. However, that didn't quite work either, so i then tried to create a virtualenv for which i tried to install airflow and it is still giving me this ImportError: No module named mako.util
not sure if it matters, but here's my setup:
(airflow) [davidtian: airflow]$ python --version
Python 2.7.12
(airflow) [davidtian: airflow]$ pip --version
pip 8.1.2 from /Users/someone/Desktop/blah/airflow/airflow/lib/python2.7/site-packages (python 2.7)
(airflow) [davidtian: airflow]$
How do i install this mako.util module?
Finally figured it out. after trying a bunch of things. for one, the python that comes with Mac apparently doesn't work very well. you have to brew install python instead. with that python, it comes with pip by default
i had to actually sudo pip uninstall airflow and then install it again.
I'm not experienced in Python, and I need the requests module.
I've tried installing it using pip install requests
The installation went successfully, but when I try to import the module, I get an error like "no module named requests".
Should I add the install location to PYTHONPATH? If yes, how can I find the location where pip installed the files? I don't know about virtualenv, and I am using Ubuntu.
You should install pip for python3 first
How to install pip with Python 3?
then with the pip-3.X install the required module.