Develop Reference

Problems with Python: ImportError: No module named ... [Linux]

I am a noob with installing python programs. I know there are a lot of Questions like this here, I have tried to find a solution for my problem but I can't fix it.
First of all, I am trying to install a program called Qarq. The readme says:
Setup
In order to get qark running, it must be present on your python path. If not, it may lead to module not found errors. This can be done for your current shell by running the following:
export PYTHONPATH={qark root directory}:$PYTHONPATH
Well, I type the command. I check the variable with an echo and I can see the directory in the variable. However, I type "python setup.py install" and I get this error:
santoku#santoku-PC:~/qark$ python setup.py install
Traceback (most recent call last):
File "setup.py", line 1, in <module>
from setuptools import setup, find_packages
ImportError: No module named setuptools
Then, I read in a question here that you must install setuptools, so I did it. I ran the next command:
sudo apt-get install python-setuptools
But the problem is still there, I try to run "python setup.py install" and I get the same error.
On the other hand, the readme says you only need to execute "$ python qarkMain.py". I do that and I get the same error with different module:
santoku#santoku-PC:~/qark/qark$ python qarkMain.py install
Traceback (most recent call last):
File "qarkMain.py", line 30, in <module>
from qark.modules.IssueType import IssueSeverity
ImportError: No module named qark.modules.IssueType
I am using Python 2.7.12 (default, Nov 12 2016, 01:02:22) [GCC 4.8.4] on linux2. (Ubuntu 14.04.5 LTS)
I have tried to install qark on Ubuntu 16.04.1 LTS and it worked perfectly. I didn't need to install setuptools. Both have the same python version.
I guess the problem is python can't find the modules, maybe I have to move the qark directory to another directory.
I think that's all, if you need more extra information just ask me.
I need your help, I am sure my problem is a foolishness and easy to fix. But I am a noob with python and I don't have any idea.
Thank you very much and thanks in advance.
Sorry for my English, I am not a native speaker.
EDIT: I found a solution, I tried to install again the OS and now python works properly, I don't know if I broke python or I did something bad. Anyway, Thanks.

i could get it work typing this:
1) PYTHONPATH=\home\santoku\qark\qark\:$PYTHONPATH
then just type:
2) python qarkMain.py

Install SCIP solver on Python3.5 Numberjack (OSX)

I am learning Constraint Programming in Python and, for the solving of the problems, I am supposed to use the SCIP solver. I have installed the Numberjack standard package from Github witch includes Mistral, Mistral2, Toulbar2, MipWrapper, SatWrapper, MiniSat and Walksat solvers.
Running my code I got the following error:
Traceback (most recent call last):
File "/Users/angelocoelho/anaconda3/lib/python3.5/site-packages/Numberjack/__init__.py", line 910, in load
lib = __import__(solverstring, fromlist=[solverspkg])
ImportError: No module named 'Numberjack.solvers.SCIP'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "grafosdefluxos.py", line 42, in <module>
solver = model.load('SCIP')
File "/Users/angelocoelho/anaconda3/lib/python3.5/site-packages/Numberjack/__init__.py", line 915, in load
solvername)
ImportError: ERROR: Failed during import, wrong module name? (SCIP)
I already ran make in 'scipoptsuite-3.1.0' and in 'scip-3.2.1', installed Numberjack-master's 'setup.py' and tried this:
python setup.py -solver SCIP
witch returned the error
Error: the solver 'SCIP' is not known, please use one of: Mistral, SatWrapper, Toulbar2, Walksat, MipWrapper, MiniSat, Mistral2
I have the SCIP folders alongside and inside the Numberjack folders.
I read and ran all the commands in the README and INSTALL files on how I could get this solver configured but I couldn't get it right.
How can I get SCIP available to solve the problems in Numberjack?

After talking to the assistant teacher I got the answer for this problem.
The folder where Numberjack/SCIP was being installed was not the one it was supposed to be, therefore it was not really included in the solver list. After completing the python setup.py build and python setup.py install installation I ran python setup.py build -solver SCIP and the terminal feedback stated
Successfully built solver interfaces for MipWrapper, SCIP
But the jupyter notebook didn't recognize the solver.
What solution should work having Anaconda (python3.5) already installed:
Download Numberjack (file "Numberjack-master.zip") and unpack it.
Download SCIP and copy the downloaded file, scipoptsuite-3.1.0.tgz. Paste it inside Numberjack-master unpacked directory. The path of it should be ~/Downloads/Numberjack-master/scipoptsuite-3.1.0.tgz.
In terminal run cd ~/Downloads/Numberjack-master (or your Numberjack-master directory path).
Then run python3.5 setup.py install --user.
In my case Jupyter was looking for the solvers in
~/anaconda3/lib/python3.5/site-packages/Numberjack/ and they were
not being installed there so, instead of using python, I used python3.5 since my Anaconda was the Python 3.5 package.

Why is there a scip-3.2.1 directory? The SCIP Opt Suite 3.1.0 contains SCIP 3.1.0. You need to make sure to run all setup and make commands exactly as stated on the Numberjack install page.

pdfminer - ImportError: No module named pdfminer.pdfdocument

I am trying to install pdfMiner to work with CollectiveAccess. My host (pair.com) has given me the following information to help in this quest:
When compiling, it will likely be necessary to instruct the
installation to use your account space above, and not try to install
into the operating system directories. Typically, using "--
home=/usr/home/username/pdfminer" at the end of the install command
should allow for that.
I followed this instruction when trying to install.
The result was:
running install
running build
running build_py
running build_scripts
running install_lib
running install_scripts
changing mode of /usr/home/username/pdfminer/bin/latin2ascii.py to 755
changing mode of /usr/home/username/pdfminer/bin/pdf2txt.py to 755
changing mode of /usr/home/username/pdfminer/bin/dumppdf.py to 755
running install_egg_info
Removing /usr/home/username/pdfminer/lib/python/pdfminer-20140328.egg-info
Writing /usr/home/username/pdfminer/lib/python/pdfminer-20140328.egg-info
I don't see anything wrong with that (I'm very new to python), but when I try to run the sample command $ pdf2txt.py samples/simple1.pdf I get this error:
Traceback (most recent call last): File "pdf2txt.py", line 3, in <module>
from pdfminer.pdfdocument import PDFDocument ImportError: No module named pdfminer.pdfdocument
I'm running python 2.7.3. I can't install from root (shared hosting). The most recent version of pdfminer, which is 2014/03/28.
I've seen some posts on similar issues ("no module named. . . " but nothing exactly the same. The proposed solutions either don't help (such as installing with sudo - not an option; specifying the path for python (which doesn't seem to be the issue), etc.).
Or is this a question for my host? (i.e., something amiss or different about their setup)

I had an error like this:
No module named 'pdfminer.pdfinterp'; 'pdfminer' is not a package
My problem was that I had named my script pdfminer.py which for the reasons that I don't know, Python took it for the original pdfminer package files and tried to compiled it.
I renamed my script to something else, deleted all the *.pyc file and __pycache__ directory and my problem was solved.

use this command worked for me and removed the error
pip install pdfminer.six

Since the package pdfminer is installed to a non-standard/non-default location, Python won't be be able to find it. In order to use it, you will need to add it to your 'pythonpath'. Three ways:
At run time, put this in your script pdf2txt.py:
import sys
# if there are no conflicting packages in the default Python Libs =>
sys.path.append("/usr/home/username/pdfminer")
or
import sys
# to always use your package lib before the system's =>
sys.path.insert(1, "/usr/home/username/pdfminer")
Note: The install path specified with --home is used as the Lib for all packages which you might want to install, not just this one. You should delete that folder and re-install with --
home=/usr/home/username/myPyLibs (or any generic name) so that when you install other packages with that install path, you would only need the one path to add to your local Lib to be able to import them:
import sys
sys.path.insert(1, "/usr/home/username/myPyLibs")
Add it to PYTHONPATH before executing your script:
export PYTHONPATH="${PYTHONPATH}:/usr/home/username/myPyLibs"
And then put that in your ~/.bashrc file (/usr/home/username/.bashrc) or .profile as applicable. This may not work for programs which are not executed from the console.
Create a VirtualEnv and install the packages you need to that.

I have a virtual environment and I had to activate it before I did a pip3 install to have the venv see it.
source ~/venv/bin/activate

Unable to import git in python

I am facing these issues. Can you help me with the same ?
Why am I seeing this error ? Do I have to add anything in the requirements.txt file ?
>>> import git
Traceback (most recent call last):
File "<pyshell#7>", line 1, in <module>
import git
File "git\__init__.py", line 29, in <module>
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH
>>> from git import Repo
Traceback (most recent call last):
File "<pyshell#8>", line 1, in <module>
from git import Repo
File "git\__init__.py", line 29, in <module>
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH

I already had gitdb and smmap installed so I had to reinstall them.
You can reinstall them by running the following command in your terminal:
pip3 install --upgrade --force-reinstall gitdb; pip3 install --upgrade --force-reinstall smmap

I also got the message ImportError: 'gitdb' could not be found in your PYTHONPATH (when trying to use GitPython).BUT I had gitdb already installed!
Thanks to this hint I figured out that gitdb silently failed because it was missing smmap.
So I installed this and it worked.

You need to install gitdb package.
$ sudo easy_install gitdb

I had the same problem. However, gitdb and smmap were already installed by pip. As I used brew to install python and its dependencies on my mac, when I checked brew doctor command, it said that my /usr/local/sbin directory is not in my PATH. So I added it to my PATH (though it didn't have anything to do with the python) and everything worked out eventually.

MS Windows Versions of this problem can occur because of the order of Python versions in your system PATH, as it did for me. I did not realize that when I installed another program, it installed a newer version of Python for its own usage, and it appended my system PATH with the address to the newer version. I noticed it when I looked at the PATH variable and found two versions of Python being called. Windows uses the first it finds, and if the first doesn't match what your program expects, it gets confused and can't find the right path to the module. This is what I did to resolve it:
To check: an easy way to test if this is your problem is to see if the paths separated by semicolons are in the right order. That can be seen in the System Variables of Windows or by printing your PATH variable in your CMD shell like in this example:
C:> path
PATH=C:\Program Files (x86)\Python37-32\Scripts;C:\Program Files (x86)\Python37-32;C:\Program Files\Python38\Scripts;C:\WINDOWS
Temporary solution:
To see if it is going to fix your computer, change it in your CMD window. Your variable change will be discarded when the window is closed. One way to do this test is to copy the paths, move the Python references to the order they are needed, and write it back:
C:> set path = C:\WINDOWS;C:\Program Files (x86)\Python37-32;C:\Program Files\Python38\Scripts;C:\Program Files (x86)\Python37-32\Scripts\
Then run the Python program to see if this was your problem. Note that this is only an example; do not copy & paste it. Your path is customized for the programs on your computer.
Permanent solution: If the above test resolves your problem, you must change your System Variables to make the change permanent. For me that usually requires a reboot afterwards in order to make the variables appear in all new windows.

PyCharm & Pyenv local?

After I broke my Ubuntu precise with a Cython compilation I like to keep the system Python clean. I like to have 2.7.x & 3.4.x besides each other and used Pyenv to have a global default interpreter independent from the system python. Now I also want to define local interpreters on a per project basis, usually done with pyenv local. Unfortunately my favorite IDE PyCharm does only support pyenv global, the local .python-version files are obviously not recognized by PyCharm.
So I tried to use the pyenv global interpreter in PyCharm with ~/.pyenv/bin/python-local-exec which works but unfortunately is already deprecated. When I then tried to create a virtualenv from the pyenv Python 3 global interpreter, it throwed the follwing error:
The following command was executed:
virtualenv.py /home/barrios/code/so/venv
The error output of the command:
pyenv: `python-local-exec' is deprecated and will be removed in the next release.
To upgrade: https://github.com/yyuu/pyenv/wiki/python-local-exec
Failed to import the site module
Traceback (most recent call last):
File "/home/barrios/code/so/venv/lib/python3.4/site.py", line 67, in <module>
import os
File "/home/barrios/code/so/venv/lib/python3.4/os.py", line 634, in <module>
from _collections_abc import MutableMapping
ImportError: No module named '_collections_abc'
Using base prefix '/home/barrios/.pyenv/versions/3.4.0b3'
New python executable in /home/barrios/code/so/venv/bin/python
ERROR: The executable /home/barrios/code/so/venv/bin/python is not functioning
ERROR: It thinks sys.prefix is '/home/barrios/.pyenv/bin' (should be '/home/barrios/code/so/venv')
ERROR: virtualenv is not compatible with this system or executable
As mentioned before, I don't want to install Python 3 into my Ubuntu system folders. Any ideas how to achieve that?
TNX a lot!

I'd suggest to use https://github.com/yyuu/pyenv-virtualenv to create virtualenv for a desired interpreter and then add it as a Python interpreter in PyCharm.