Develop Reference

How to manually import a module in python

When i try to run ovirt downloads_disk_snapshot from this link i am getting error as
Traceback (most recent call last):
File "download_disk_snapshots.py", line 22, in <module>
import ovirtsdk4 as sdk
ImportError: No module named ovirtsdk4
Link is https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/download_disk_snapshots.py

This guide gives some very useful information on installing python packages.
In your case, you will have to install the oVirt Engine SDK itself before being able to run the example.
Installation instructions are given within the same Github project that you are mentioning:
https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/README.adoc#installation

Problems importing from Google App Engine SDK in PyCharm Pro

Using PyCharm Pro 2019.1.1 on MacOS, writing my app in Python 3 w/Flask, Jinja2, etc. A version of my app is already deployed using App Engine Flexible, and I want the next version to use Datastore for my production environment variables. Having problems trying to follow this post, which requires the following import:
from google.appengine.ext import ndb
For the life of me, I cannot seem to get this import working. I'm sure it will work once my app is deployed (famous last words?), but I'd love to get it working locally too.
Initially tried pip install google-appengine and pip install appengine-sdk, only to discover neither could be installed on my venv.
Google Cloud SDK v241.0.0 is installed at /Users/<me>/google-cloud-sdk, and gcloud commands work in the terminal. gcloud components list shows the app-engine-python component is installed, which is probably irrelevant since I'm using a venv in PyCharm.
PyCharm's documentation instructed me to select the App Engine SDK directory under Languages & Frameworks > Google App Engine.
Selecting /Users/<me>/google-cloud-sdk yields this error:
Traceback (most recent call last):
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/pydev/pydevconsole.py", line 5, in <module>
from _pydev_comm.rpc import make_rpc_client, start_rpc_server, start_rpc_server_and_make_client
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/pydev/_pydev_comm/rpc.py", line 4, in <module>
from _pydev_comm.server import TSingleThreadedServer
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/pydev/_pydev_comm/server.py", line 4, in <module>
from _shaded_thriftpy.server import TServer
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/third_party/thriftpy/_shaded_thriftpy/server.py", line 5, in <module>
import logging
File "/Users/<me>/google-cloud-sdk/lib/surface/logging/__init__.py", line 22, in <module>
from googlecloudsdk.calliope import base
ModuleNotFoundError: No module named 'googlecloudsdk'
Selecting /Users/<me>/google-cloud-sdk/platform/google_appengine seems to get me a bit further, but still yields an error:
Traceback (most recent call last):
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/pydev/pydevconsole.py", line 5, in <module>
from _pydev_comm.rpc import make_rpc_client, start_rpc_server, start_rpc_server_and_make_client
File "/Users/<me>/Library/Application Support/JetBrains/Toolbox/apps/PyCharm-P/ch-0/191.6605.12/PyCharm.app/Contents/helpers/pydev/_pydev_comm/rpc.py", line 1, in <module>
import socket
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/socket.py", line 53, in <module>
from enum import IntEnum, IntFlag
ImportError: cannot import name 'IntFlag' from 'enum' (/Users/<me>/google-cloud-sdk/platform/google_appengine/lib/grpcio-1.9.1/enum/__init__.py)
As the console notes, there is no IntFlag object in 'enum'. These errors are immediately shown when I launch Python Console; I don't even get a cursor. Where am I going wrong?

The post you referenced applies to the 1st generation standard environment - Python 2.7 - that's the only environment in which the ndb library is supported:
The Python NDB Client Library Overview
For the other environments you need to use the generic datastore client library. References:
Using Cloud Datastore - for the 2nd generation standard environment
Using Cloud Datastore - for the flexible environment
Potentially of interest: How to tell if a Google App Engine documentation page applies to the standard or the flexible environment

Installed Twitter module for python cannot be imported

$ python3 setup-py install
....
Installed /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/twitter-1.17.1-py3.5.egg
Processing dependencies for twitter==1.17.1
Finished processing dependencies for twitter==1.17.1
$ python3 twitter.py
Traceback (most recent call last):
File "twitter.py", line 1, in <module>
from twitter import Twitter
File "/Users/eddiee/2_python/twitter.py", line 1, in <module>
from twitter import Twitter
ImportError: cannot import name 'Twitter'
What might cause the problem:
Due to the restrictions of the preinstalled python on Mac, I installed another new python and changed the path. But I don't know how to install the module to the new python.

Eddie:
Try to change the import line to:
import twitter
or:
from twitter import Twitter
Hope it helps.

The problem here is I names my file as "twitter.py". When I imported the twitter module, python automatically imported the file itself, because the current file has a higher priority over the module. Simply changing the file name can solve the problem.

Testing Google App Engine apps

I am looking to see how others are testing their GAE apps. I've come across a few unit testing frameworks for python (green, pytest, nose, etc).
I then found the tutorial on the GAE site: https://developers.google.com/appengine/docs/python/tools/localunittesting and have been following that.
However, after doing what they say I get the following error:
Traceback (most recent call last):
File "tests/test.py", line 2, in <module>
from google.appengine.ext import db
ImportError: No module named appengine.ext
I am just running
python testrunner.py main/tests usr/local/google_appengine
from the terminal.
Any other ideas?
I have appengine in my pythonpath:
echo $PYTHONPATH
-> /usr/local/google_appengine

Configure python model in xampp

I installed mod_python, I try to run python script like:
from mod_python import apache
It show me the error message:
Traceback (most recent call last):
File "<pyshell#3>", line 1, in <module>
from mod_python import apache
File "D:\Python27\lib\mod_python\apache.py", line 55, in <module>
import _apache
ImportError: No module named _apache
I don't know why?
My enviroment:
Windows XP, Python 2.7.2

If you don't get any help here, try the mod_python mailing list:
http://www.modpython.org/live/mod_python-2.7.8/doc-html/installation.html

Its probably that the script location is not added to your path.
try:
import sys
sys.path
sys.path.append('/path/to/the/mod_python.py')
If this doesn't work, it was probably not installed correctly.
If you want to add it to your system path permanently so you don't have to use the code above every time check out this SO question.