Develop Reference

Python3.6 ImportError: cannot import name 'main' after upgrading pip from 8.1.1 to 19.0.1

After I upgraded pip from 8.1.1 to 19.0.1 by running
pip install --upgrade pip
I tried to test the version of pip by running
pip -V
But I got the following error
Traceback (most recent call last):
File "/usr/bin/pip3", line 9, in <module>
from pip import main
ImportError: cannot import name 'main'
I set the python3 and pip3 to be default by putting the following in ~/.bashrc
alias python=python3
alias pip=pip3
My system is ubuntu 16.04

This is a common issue as referenced here : https://github.com/pypa/pip/issues/5221
You are trying to use the pip, which is shipped with the Debian system. You better try to avoid using that pip at any cost.
Please use python3 -m pip install package instead of the system pip which you have in the debian system.
I also recommend using venv - virtual environments for keeping your system environment safe.

Not able to import MySQL into python on OS X

from flask_mysqldb import MySQL
File "/Library/Python/2.7/site-packages/flask_mysqldb/__init__.py", line 1, in <module>
import MySQLdb
File "/Library/Python/2.7/site-packages/MySQLdb/__init__.py", line 18, in <module>
import _mysql
ImportError: dlopen(/Library/Python/2.7/site-packages/_mysql.so, 2): Library not loaded: #rpath/libmysqlclient.21.dylib
Referenced from: /Library/Python/2.7/site-packages/_mysql.so
Reason: image not found
this is the error I receive when trying to run my flask app on a local server.

You may have to install the python connector for mysql.
> brew install mysql-connector-c
> pip install mysql-python`
After installation, your import should work fine.
NB: I assume that you have already installed homebrew

It's easy to do, but hard to remember the correct spelling:
pip install mysqlclient
If you need 1.2.x versions (legacy Python only), use pip install MySQL-python
Note: Some dependencies might have to be in place when running the above command. Some hints on how to install these on various platforms:
Ubuntu 14, Ubuntu 16, Debian 8.6 (jessie)
sudo apt-get install python-pip python-dev libmysqlclient-dev
Fedora 24:
sudo dnf install python python-devel mysql-devel redhat-rpm-config gcc
Mac OS
brew install mysql-connector-c
if that fails, try this
brew install mysql

Python error - "ImportError: cannot import name 'dist'"

I'm on Ubuntu 16.04, and I get:
Traceback (most recent call last):
File "/home/omermazig/.virtualenvs/fixi/bin/pip", line 7, in <module>
from pip import main
File "/home/omermazig/.virtualenvs/fixi/lib/python3.6/site-packages/pip/__init__.py", line 26, in <module>
from pip.utils import get_installed_distributions, get_prog
File "/home/omermazig/.virtualenvs/fixi/lib/python3.6/site-packages/pip/utils/__init__.py", line 23, in <module>
from pip.locations import (
File "/home/omermazig/.virtualenvs/fixi/lib/python3.6/site-packages/pip/locations.py", line 9, in <module>
from distutils import sysconfig
File "/home/omermazig/.virtualenvs/fixi/lib/python3.6/distutils/__init__.py", line 25, in <module>
from distutils import dist, sysconfig
ImportError: cannot import name 'dist'
When I run anything with python. This specifically is for trying to run "pip freeze". What to do?

try it
sudo apt install python3-distutils

My case was when I upgraded Ubuntu 18 -> 19.
So it reinstalled python and what I needed to do is:
remove old virtual environment
create a new one
install requirements via pip into it

I ran into this problem after installing Python 3.8 on Ubuntu (I have version 16.04)
$ lsb_release -d
Description: Ubuntu 16.04.6 LTS
Reproduce the error
Just try to import distutils
$ python3 -c "from distutils import sysconfig"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: cannot import name 'sysconfig' from 'distutils' (/usr/lib/python3.8/distutils/__init__.py)
$ sudo apt install python3-distutils
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3-distutils
The package python3-distutils cannot be found
$ sudo apt install python3-distutils
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3-distutils
list available distutils
What helped was to list all distutil packages using a regexp
$ apt list *distutils*
Listing... Done
python-distutils-extra/xenial,xenial 2.39-1 all
python-stsci.distutils/xenial,xenial 0.3.7-4 all
python3-distutils-extra/xenial,xenial 2.39-1 all
python3-stsci.distutils/xenial,xenial 0.3.7-4 all
python3.7-distutils/xenial,xenial 3.7.8-1+xenial1 all
python3.8-distutils/xenial,xenial 3.8.3-1+xenial1 all
python3.9-distutils/xenial,xenial 3.9.0~b4-1+xenial1 all
Install the correct distutils package
For my Python 3.8 I picked python3.8-distutils and it worked
$ sudo apt-get install -y python3.8-distutils

Since I run into this issue everytime I update my ubuntu version every six months, then stumble on the exact same SO result, here is my solution.
If the other solutions listed here don't work (installing python3-distutils), it might be because of different python versions between the system and the virtualenv.
The easy solution is to destroy your virtualenv, then recreate it from scratch.

Solved: I've just got this issue in a virtual environment installed 2 years ago, using python3.7
Running pip3 or python3.7 -c "from distutils import dist, sysconfig" from the venv, I got the error ImportError: cannot import name 'dist'
Using system python 3.9, this error disappers.
I solved copying the /usr/lib/python3.9/distutils into the python3.7 virtual environment.

Take a loot at this (similar problem):
https://github.com/pypa/pip/issues/5367
Possible fix:
Download Python source from https://www.python.org/
Decompress the source code
Install the following dependencies:
sudo apt-get install zlib1g-dev (needed to compile Python)
and install:
sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev (needed by Pip to make SSL requests)
Compile and install Python:
/configure
make
make install
Python 3.6 with Pip should be installed.
Full credit to jonbesga.

ImportError: No module named gtk

I have a PC running Ubuntu 17.10. I want to runn a python script that uses gtk. HoweverI get the following error:
Traceback (most recent call last):
File "/usr/local/bin/selectvm.py", line 3, in <module>
import gtk
ImportError: No module named gtk
I have tried already many things like:
sudo apt install python-gtk2
sudo apt install python-gtk2-dev
but none of them works. APT says they are already installed.

Try:
sudo apt-get install python-gtk2
These are the python bindings for GTK.
Graphic package nessesary to build the software-center UI.
Or:
sudo apt-get install afnix
credits

Can not import MySQLdb on python although it is installed [duplicate]

This question already has answers here:
Python MySQLdb not importing
(7 answers)
Closed 3 years ago.
I'm going to connect to mysql database using python. My python version is 2.7.12 and I've installed MySQL using sudo yum install MySQL-python
Package MySQL-python26-1.2.3-11.14.amzn1.x86_64 already installed and latest version
Nothing to do
Linux version:
$ cat /etc/*-release
NAME="Amazon Linux AMI"
VERSION="2016.09"
ID="amzn"
ID_LIKE="rhel fedora"
VERSION_ID="2016.09"
But when I try to import MySQLdb package it gives an error:
$python
>>> import MySQLdb
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named MySQLdb
I've tried different ways as long as I found on the internet but it didn't work.
Any help would be appreciated.
Updated:
Required dependency library:
sudo yum install mysql-devel

Try running:
pip install MySQL-python
Make sure you have depending libraries installed.
For that you may run:
sudo dnf install python python-devel mysql-devel redhat-rpm-config gcc
As in your case sudo yum install mysql-devel did the job for you.

install pip and upgrade to the latest version.
apt-get install python-pip
pip install -U pip
Next, install the required development packages.
apt-get install python-dev libmysqlclient-dev
Then...
pip install MySQL-python
This should complete installation. After running these commands successfully, try importing MySQLdb in python interpreter.
>>> import MySQLdb