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I have been using the standard python that comes with OS X Lion (2.7.2) but I wanted to build a UCS-4 version to handle 4-byte unicode characters better.
I had already installed pip and packages like pytz, virtualenv and virtualenvwrapper, etc., and these are installed in /Library/Python/2.7/site-packages. My $PATH is /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin.
To build a new version of python on the machine (outside of any project specific virtual environments, that will come later), I followed the instructions on this article and managed to build it in /usr/local/bin. The problem is that when I launched a new bash window, I got the following virtualenvwrapper error:
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: No module named virtualenvwrapper.hook_loader virtualenvwrapper.sh: There was a problem running the initialization hooks.
If Python could not import the module virtualenvwrapper.hook_loader, check that virtualenv has been installed for VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python and that PATH is set properly.
The instructions said to move /usr/local/bin to the top of the /etc/paths file, and since then I've noticed some strange issues. I installed pip into /usr/local/bin and now I have assumed that since I'm working in /usr/local/bin, and the newly installed python's site packages is now located in /usr/local/lib/python2.7/site-packages, when I do pip freeze, it should be empty as nothing is installed there yet. However, pip freeze still reports things installed in the old (OS X) site-packages folder. Here's some info after the build:
$ which python
/usr/local/bin/python
$ which pip
/usr/local/bin/pip
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
When I uninstall a python package with pip, it removes it from the old site-packages folder as expected. When I install it again, instead of installing it in /usr/local/lib/python2.7/site-packages, it installs it in /Library/Python/2.7/site-packages (verified by attempting to install it again and receiving Requirement already satisfied (use --upgrade to upgrade): pytz in /Library/Python/2.7/site-packages
). How is it getting that path for the old site-packages folder? Why won't it install it in the correct location for the python install it's using?
I'm getting several other issues since promoting /usr/local/bin but I think if I understand this I'll be able to get somewhere.
Can anyone see what's happening? If you need any more info I'll be happy to provide it.
Since you will be using the custom python installation as your main one, I suggest you uninstall all non-standard packages from the system python and make sure that the existing easy_install.py is gone (possibly by manually removing it). Then download distribute's distribute_setup.py and run it with the new interpreter. From then on everything should work as expected.
Related
This question already has answers here:
pdfminer - ImportError: No module named pdfminer.pdfdocument
(4 answers)
Closed 4 months ago.
I have found a few solutions here and elsewhere, but none of them has worked. Context: I am trying to get pdf2txt going on my Pop!_OS 22.04 LTS system. I am using Python 3.10.6, with no other versions present. The command-line states that it requires python3-pdfminer to work, which I installed with apt. Output states that there is no module named 'pdfminer.high_level'. This comment here notes that it's a part of pdfminer.six which can be installed using pip, using a dash instead of a dot if it's inside a virtual environment.
$ python3 -m pip install pdfminer.six
states that requirements are already satisfied. To be sure, I also switched to a virtualenv and installed it there:
$ pip install pdfminer-six
Running pdf2txt in both cases results in the same error, i.e.
File "/usr/bin/pdf2txt", line 9, in <module>
import pdfminer.high_level
ModuleNotFoundError: No module named 'pdfminer.high_level'
I then tried to uninstall and reinstall pdfminer.six, first on the system wide version. python3 -m pip uninstall pdfminer.six (or just pip3) was not allowed, so I made a judgment of error and used sudo. Reinstalling now shows:
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: pdfminer.six in /usr/lib/python3/dist-packages (-VERSION-)
so I am not sure if it is properly installed. So I tried in the virtualenv where there were no problems. But the same error remains.
I reinstalled python3-pdfminer but without success.
In the virtualenv, I found:
./lib/python3.10/site-packages/pdfminer/high_level.py
./lib/python3.10/site-packages/pdfminer/__pycache__/high_level.cpython-310.pyc
I then created a test Python file that imports pdfminer.high_level and ran it, with no problem. I then did the same outside the virtualenv. pdfminer is imported correctly, but it can't import pdfminer.high_level. So I found the following:
When I uninstall pdfminer.six, it looks in /usr/local/lib/python3.10/dist-packages and removes it from there.
When I install pdfminer.six, it looks in /usr/lib/python3/dist-packages. Here, the high_level package is present. But the system always looks in /usr/local/lib/python3.10/dist-packages, so the package is never found.
So, I think that I found the cause of the problem. Running pdf2txt doesn't work in the virtualenv because it's still a file in /usr/bin that will look for a system-wide version. I suppose that I can update a system environment path to point to /usr/lib/python3/dist-packages, and solve it like this (pdf2txt is actually not binary so I can append to sys.path). But why has this discrepancy occurred in the first place? And what is the proper way to deal with it? After all, there is a reason why some packages are installed in different locations.
Many thanks.
EDIT: Adding to sys.path doesn't work, but adding to PYTHONPATH does. Not sure if this is something that I should watch out for in the future, or just a result of a Python executable installed in /usr/bin messing up with the idea of using a virtualenv in the first place.
Sometimes this issue happens when you have same name file in your working dir. So please check that first like if you have a file name "pdfminer.py".
If that is not the case then I usually try the previous version of lib.
you can try installing previous version with
pip install pdfminer.six==20220506
I have been having an issue where pip and python seem to be ignoring the fact that they are in a virtualenv. I found the following:
pip command in virtualenv ignored in favour of system pip command
pip not pointing to virtual enviroment, in virtual enviroment
But neither seem to answer my issue.
The key issue seems to be when pip is trying to install modules it is detecting the module at the system level and then thinking it is already there, tries to uninstall it then fails because it isn't in the same environment.
For example, I need to update Wernzeug, so I try:
[venv] me#somemachine: pip install werkzeug
which results in:
Requirement already satisfied: werkzeug in /python/3.7.2/rh60_64/modules (0.15.2)
The weird bit starts if I run an uninstall:
[venv] me#somemachine: pip uninstall werkzeug
When I get:
Not uninstalling werkzeug at
/python/3.7.2/rh60_64/modules, outside environment
/venv Can't uninstall 'Werkzeug'. No files were found to uninstall.
Here's the kicker, due to the way the server is built I'm having to use the 'sw' command to get python (in this case 3.7.2). I'm wondering if this has something to do with the venv getting confused with where it is supposed to be looking. I do not have root access to the server, nor am I likely to get it, so I can't mess with the system installed modules.
Other useful info:
The base system is REHL 6.6
pip -V output:
pip 22.0.4 from /venv/lib/python3.7/site-packages/pip (python 3.7)
Any pointers or ideas that might help this are more than welcome.
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.
new to python installed python 3.5 32-bit on windows 10, used pip to install a module
C:\Users\Lopez\Anaconda3\Scripts>pip install ystockquote
Requirement already satisfied (use --upgrade to upgrade): ystockquote in c:\users\lopez\anaconda3\lib\site-packages
You are using pip version 7.1.2, however version 8.1.2 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
when I go to the IDLE and try the following I get a no module name
import ystockquote
Traceback (most recent call last):
File "", line 1, in
import ystockquote
ImportError: No module named 'ystockquote'
not sure what i am missing, guess its path related but appreciate any feedback
thanks, Juan
Run pip --version and check the Python version and start IDLE and check the Python version and see if they match.
If not, use explicit pipx.y matching IDLE or start IDLE from a Python matching plain pip.
thanks for your help guys,
I beleive the issues where with adding paths to my environment variables not the version of pip. I managed to get this working using the window pip install once i installed python 3 in a custom directory C:\Python35 rather than the deafault long windows suggested path
Instructions
In the Control Panel, search for Environment; click Edit the System Environment Variables. Then click the Environment Variables button.
In the User Variables section, we will need to either edit an existing PATH variable or create one. If you are creating one, make PATH the variable name and add the following directories to the variable values section as shown, separated by a semicolon. If you’re editing an existing PATH, the values are presented on separate lines in the edit dialog. Click New and add one directory per line.
C:\Python35-32;C:\Python35-32\Lib\site-packages\;C:\Python35-32\Scripts\
I'm really struggling at installing any python modules (e.g six, yahoo_finance) because they require pip to be installed, but I don't know whether I have pip already or how to install it. Once its installed I don't know what command to type in and where to type it in. Can I install these modules any other way without pip?
I am only a beginner, so sorry if this is a bit basic.
Thanks in advance
pip comes already bundled with python 3.4 It will be in your scripts directory C:\Python34\Scripts\
Add it to your Environment variables and you can run it from any directory or else open the directory mentioned above in command prompt and run pip install ... to install whatever you want
First, make sure you have it installed, if not follow the instructions below. Type which pip, and if it doesn't list an URL, it means it's not installed yet.
Go here https://bootstrap.pypa.io/get-pip.py and download the file.
Then open terminal and go to your downloads folder (or wherever you downloaded it to) and type python get-pip.py to execute the script. If you get an error that says OSError: Permission Denied, or something similar, run it with administrator permissions.
If the installation is successful, you should now have pip installed on your computer. Type pip --version to make sure you have it installed.
To install six and yahoo_finance, type:
pip install six
and
pip install yahoo-finance
If something goes wrong update your question.
From Installing Python Modules:
pip is the preferred installer program. Starting with Python 3.4, it is included by default with the Python binary installers.
Emphasis mine
If you already installed it by default you should be able to use it.
Just open the command line and type python -m pip install SomePackage.