So, i recently used sublime text for python code and i couldnt run code because i forgot to check mark the 'add to path' option, i thought to just reinstall python properly. But i have downloaded some libraries from pip will they also be removed completely if i delete/uninstall python?
surprisingly no one has asked this Q on stackoverflow as i didnt find any.
Also: i came across this link while searching for my question which was about packages/modules. Is there a difference between library/packages/modules? i thought the words were used interchangeably but the code syntax suggests otherwise?
I don't know the answer, but here is a work-around:
Get all currently installed packages and store them in a file
pip freeze > current.txt
Then you can uninstall Python.
Next step would be to re-install Python, followed by re-installing your packages.
pip install -r current.txt
The packages would either be installed again, or a message will be raised stating the package is already installed (i.e. requirement already satisfied)
Related
I got this error even though I did install the PyQt5 package (yesterday, it worked normally)
and then I find the location of the site-package python, but nothing there? Not even a single one (I did install many packages yesterday)
I try to reinstall with homebrew and pip, and in both cases, it noticed that my package was installed (for homebrew, it said that I have to reinstall instead of using install since the package was already there)
When I check, there is only one folder of python so there was no misunderstanding about the python package in this case.
Can someone tell me why did it happen and how to solve it?
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I'm installing a bunch of python modules on my system that are specific to this code I am going to be working with. Specifically, I used pip install pyda to get the pyda module. To make sure I had gotten all the modules, I went through and ran some of the code snippets, and came across the following error:
ModuleNotFoundError: No module named 'pyda.utilities'
I tried using pip install pyda.utilities, but that honestly doesn't make sense, it should have just come with the pyda module. According to this website https://pypi.org/project/pyda/ it seems like it should come with the package. I tried determining if I just installed it in the wrong python version, but I'm having a difficult time forcing it to use the specific python version that I installed the module in (specifically, I tried to create an alias for /usr/bin/python3.7 or something like this as I have seen on other websites, but it just fusses at me that this is simply a directory, incredibly unhelpful because I can't find the corresponding executable, so I'm a bit confused here).
This is a very long question likely with a very simple answer, any thoughts or help on what the issue might be would be appreciated.
Edit: I have determined that it's a package problem, not a python problem. The command 'pip install pyda' is not actually installing everything, oddly enough, which is why it cannot find the pyda.utilities module. Unfortunately, I think this means I will have to install the package manually. I will keep this question posted because of the useful answer on virtual environments, so thanks everyone.
The answer is indeed straightforward. As #Chris indicated in the comments, start using virtual environments.
It's not as complicated as it sounds and there's plenty of tutorials on getting started with virtualenv for Python, like https://uoa-eresearch.github.io/eresearch-cookbook/recipe/2014/11/26/python-virtual-env/
The basic steps:
check you're using the version of Python you want in your virtual environment
if you don't, change directories to where it lives
ensure you have pip and it works
check if you have virtualenv and if you don't pip install virtualenv
create a virtual environment virtualenv /your/env/folder/here
activate the virtual environment with /your/env/folder/here/Scripts/activate
After that, just install the packages you need with pip and they will end up in your virtual environment, with no interference from other Python versions or packages.
Check your python version, if it does not work restart your computer and try run setup.py install on the python command line
I am installing python on windows10 and trying to install the opencv and numpy extentions in the command window. I get no error installing them and it says it is successfully installed. But when I try to check the installation and import cv2 it does not recognize it and give me the error: no module named cv2.
can anybody help me with this problem? Is there something wrong in installation process or do I need to install something else?
I checked the newest version of each and used the compatible one with my system.
Thanks.
One solution could be that you have 2 versions of python. So, go to the specific python's scripts directory and run: pip install numpy
If that too doesn't work, you can find the answers to this question on Why can't I import opencv3 even though the package is installed?, as stated by #Cut7er.
I have tried the solutions given to the above stated question myself also. But, they didn't work for me. So, another thing that you could try to use is this IDE called PyCharm. It ofcourse is much more beautiful that the IDLE, but it also has an inbuilt GUI controlled installation of binaries or packages. That would make things a lot easier. I have faced a lot of issues with packages for python and this IDE made things a lot easier. You can find it on https://www.jetbrains.com/pycharm/download/#section=windows.
You can also use anaconda. But, I found it a little difficult to use since, it has similar issues.
EDIT:
Seems like you are using PyCharm. But, you are installing libraries from your command prompt. So, see the answer to: ImportError: No module named 'bottle' - PyCharm. This answer guides you through how to install a certain library through your PyCharm window itself. So,
1) Go to Files>Settings
2) Search for "Interpreter" from the searching tab. Open the interpreter
3) You can now see a plus sign on the right. A click on it will open up a section on the left.
4) In the searching tab, search for numpy or opencv. Click on whichever module you want to install. And then click on the "install package" button on the bottom left. This will install the package for you.
5) Then click save. And run your file that says import cv/cv2.
This should probably do the trick.
Hope it helps!
Is it possible that you have 2 versions of python on your machine and your native pip is pointing to the other one? (e.g. you pip install opencv which installs opencv for python 2, but you are using python 3). If this is so, then use pip3 install opencv
I removed the Anaconda version on my machine, so I just have python 3.7 installed. I removed the python interpreter(Pycharm) and installed it again and the problem got fixed somehow!
I suspect you have two versions of python and the one you're using doesn't have opencv on it, because pip pointed to the wrong one.
A pragmatic solution assuming you're using the python version with conda is to just use conda to install cv2:
conda install -c menpo opencv
A more careful solution is to figure out how to get the pip that points to the python version you're using. On linux I can check that my pip points to my python like this:
:~$ which python
/home/kpierce/anaconda3/bin/python
:~$ which pip
/home/kpierce/anaconda3/bin/pip
So you see the pip and python versions are associated. On windows I suspect you do an analogous thing on the command line like
where python
where pip
And if they don't match, you might try
where python
where pip3
to see if those match. You need to use the pip that points to the correct python version. You can view the python version by entering the python interpreter and running
import sys
sys.version
I was just given a new mac and after installing pip and lcc through pip I get a command not found error when running lcc run.
When running help("modules") inside of python I can see the lcc package there.
the same goes for pip freeze
pip freeze | grep lemon
lemoncheesecake==0.15.2
I'm running out of ideas.....
maybe I messed up the pip installation because I did it first with:
python get-pip.py
and then with
sudo easy_install pip
how do I fix this?
this is my echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
Thanks
From what you're saying it seems that your python installation is not quite right, and Mac's version of python is also not quite right by default, you can read more about it here: http://docs.python-guide.org/en/latest/starting/install/osx/#doing-it-right
Also, I would highly advise that when you get a brand new Mac and plan to do some development work as a rule of thumb follow these steps:
Install xcode
Install Homebrew
Then you can install anything else you want.
I think the problem is due to the fact you have more than one version of python installed. Package installed by pip are visible to one version, but not to the other. I think this issue is quite common, and has already been answered (for example) here:
Too many different Python versions on my system and causing problems
To check that this is the case:
pip show Icc
should tell you where Icc was installed.
import sys
print sys.path
should tell where python looks for modules.
I've been working with Python for a little while now but have come to absolutely detest installing new modules. It always seems to take me a full work day to install one additional module. This last happened with mpl_toolkits and now it is happening with gdal.
The main issue seems to be that easy_install/pip/get-app aren't saving a file in the correct location and so Python (I'm using Spyder) can't find it. How do I install a module in a location so that Python can find it?
I have been reading guides, articles, manuals and Stack Overflow articles all day now and I feel this needs a new question as I can't find an answer.
It is installing fine, it's just Python (and I) can't find it
It's not in the /lib/python2.7/site-packages folder, which seems to be the Python default, although half the modules that do work aren't in there when I list it
I installed using:
sudo apt-get install gdal-bin
I also tried with:
pip install gdal
but this fails with the error:
Command "python setup.py egg_info" failed with the error code 1 in /tmp/pip-build-NWJT2f/gdal/
I looked for the files using
dpkg -L gdal
and then added the file path this said into Spyder's preferences option for PYTHONPATH, but it still couldn't find it and so I'm guessing this is wrong.
I have read the official documentation of PYTHONPATH, but it's very short and doesn't really explain it at all.
I recommend trying anaconda or miniconda, which manage environments and install packages - it 'just works'.
https://www.continuum.io/downloads