We Keep Coding

Cannot import any modules (installed used pip) in python 2.7.14

I downloaded the source code of python 2.7.14 and built it and installed it on linux ( Red Hat 4.8.5-16 ). I have earlier installed python-magic and requests libraries. Now when I try to import modules installed using pip, I get this:
$ python2
Python 2.7.14 (default, Nov 9 2017, 09:05:45)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import magic
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named magic
>>> import requests
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named requests
while similar thing works perfectly fine in python 2.7.5 (default with the RHEL system)
$ python
Python 2.7.5 (default, May 3 2017, 07:55:04)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-14)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import magic
>>> import requests
>>>
Am I missing any configuration step here?

The modules installed via pip are only available to the standard python version. You need to install your desired packages for the non-standard python versions as well (see also Installing Python Modules)
python2 -m pip install python-magic
python2 -m pip install requests

your pip is default set for version
$ python
Python 2.7.5
SO if you want to install module for
$ python2
Python 2.7.14
use python2 -m pip install module_name

The sys.path must be different for the two installations. That's a list of folders that Python checks for imports.
It's probably simplest to just symlink the one for wherever pip installs to into the modules folder for 2.7.14.

How to install Tkinter module with python 2.7.5 in Redhat linux 7?

I have Python 2.7.5 in rhel-7x. I have tried to import Tkinter but i got a error as below
`Python 2.7.5 (default, Oct 11 2015, 17:47:16)
[GCC 4.8.3 20140911 (Red Hat 4.8.3-9)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import Tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named Tkinter`
Can you help me to install Tkinter module in rhel-7x with python version 2.7.5 ? Thanks in advance...

In which redhat are you ? Enterprise, fedora, centOs ?
yum install tkinter

You need to enable the optional rpm repo in /etc/yum.repos.d/redhat.repo.
You may find the section like below in the file, and set enable=1.
[rhel-7-workstation-optional-rpms]
...
enabled = 1
After enabling the optional, the command sudo yum install tkinter may work as it does for me.

Anaconda cannot find OpenCV

I've installed OpenCV in Ubuntu through sudo apt-get install libopencv-dev and then pip install python-opencv in Anaconda, but if I try to import the cv2 module I get error:
Python 2.7.11 |Anaconda 4.0.0 (64-bit)| (default, Dec 6 2015, 18:08:32)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: http://continuum.io/thanks and https://anaconda.org
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named cv2
>>>
How can I make it work?

If you want to install OpenCV in Anaconda, you must use 'conda' command in the terminal.
I have answered a similar question and you can follow this link below for detailed instruction on how to install it on Anaconda. Here is the link where I answered it:
Installing opencv 3.1 with anaconda python3?
This is command that I used to install it. Note that you must have an internet connection for this to work.
conda install -c menpo opencv3
The above command will install the latest version of OpenCV which is 3.10.
I hope that helped you =)

ImportError: No module named 'paramiko'

I have done through the other questions online here, and I feel that mine is different enough to warrant a new question.
So I have a Centos 6 box, which is running a small website for me, acts as an office git server and I am trying to configure Python3 on it.
So I followed the following these steps to set up python3 on the server. However it seems that I cannot import paramiko into my script.
I downloaded the paramiko rpm however I get this message:
When I try to import paramiko I get:
[root#GIT Python-3.4.2]# rpm -ivh /usr/lib/Python-3.4.2/Modules/python-paramiko-1.7.5-2.1.el6.noarch.rpm
Preparing... ########################################### [100%]
package python-paramiko-1.7.5-2.1.el6.noarch is already installed
When I run python3 directly:
[root#GIT inserv_health_check]# python3
Python 3.4.2 (default, Jan 21 2015, 06:28:04)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-11)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import paramiko
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named 'paramiko'
>>>
I am sure there is a simple solution to this problem perhaps the path is wrong, or I should have put a symbolic link in somewhere. Any help would be appreciated :)
Before anyone asks, which python output:
[root#GIT Python-3.4.2]# which python
/usr/bin/python
[root#GIT Python-3.4.2]# which pytho~n3
/usr/bin/which: no pytho~n3 in (/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)
[root#GIT Python-3.4.2]# which python3
/usr/local/bin/python3
Thanks

You need to do pip install paramiko so that python sees that module. If you work on a virtual environment, you need to workon <env_name> first and then pip install the desired module.

type pip3 install paramiko
if you want to install it for python3

Segmentation fault and crashing when trying to import opencv

I have mac os x 10.9. I downloaded opencv-python using homebrew and I have both the python 2.7 and python 3.4 versions off of the main python site, downloaded the usual way with macs. I need to use opencv, but they do not have a download package for macs so I used homebrew:
brew tap homebrew/science
brew install opencv
When I type python into the terminal, and then type import cv, I get a segmentation error and python quits unexpectedly. The same thing happens in IDLE. For python 3.4, I get a no module error. Here it is:
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 00:54:21)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/aurora_alvarez-buylla/cv.py", line 1, in <module>
from cv2.cv import *
ImportError: No module named 'cv2'
Python 2.7.3 (v2.7.3:70274d53c1dd, Apr 9 2012, 20:52:43)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv
Segmentation fault: 11
and then it quits unexpectedly. Does anyone know what is going on? Frankly I have spent way too much time on this opencv issue and am finding it very frustrating. Thank you!

Chris Muktar pointed in this thread that the problem is caused by the conflict between the system Python and brewed Python. Following that idea, I resolved this issue by removing the system python and re-installing opencv:
$ cd /usr/bin
$ sudo mv python python.bak
$ brew uninstall opencv
$ brew install opencv