Are there any issues when updating the Python version on a Unix system in terms of dependencies that might not carry over? I've got an SLES 11 system that comes with Python 2.6, need to update to Python 2.7.3. After I go through the update, I have scripts that need to utilized the "twisted" module which I believe should come included. Instead I'm still seeing the error
ImportError: No module named twisted.internet
I've installed using both "make install" and "make altinstall" on different occasions and they're both running into the same issue.
Related
If a python script using package X is running and package X is being upgraded, will it lead to permission problem that will cause the upgrade to fail?
I am using Windows 10, Anaconda v5.2 running on python v3.6 and conda to do update of packages.
Although pure Python files are compiled in memory when imported, and the source is (almost) no longer relevant after that, that's not the end of the story.
Packages may have extra assets that are lazily loaded, or your program or its dependencies may load dependent modules on demand, so, if running during an upgrade, it may load unexpected versions of packages/resources, or even halfway-upgraded packages.
Also, native (=non Python-only) modules - .pyd files on Windows - are dlls that are loaded in the importing process. As dlls are mapped in memory with no sharing, replacing them while they are loaded is not allowed, so this may block the upgrade of the relevant packages.
I tried a simple test just now. I ran a python script which loops forever. It uses numpy. Then, I tried to install a python package(pytorch) that requires downgrading the numpy version. When the script is running, the installation failed with some "no permission" error message. After I stopped the script, the installation succeeded.
Based on the results of this experiment, the conclusion is that it is recommended to stop all python scripts when performing python package upgrade.
When you import, you're creating a local instance of the package in your RAM for running. So upgrading your packages should not affect your scripts running.
You can look at from importlib import reload to reload your packages while your scripts are still running
I am using python 3.5 and I am doing Algorithms specialization courses on Coursera. Professor teaching this course posted a program which can help us to know the time and memory associated with running a program. It has import resource command at the top. I tried to run this program along with the programs I have written in python and every time I received ImportError: No module named 'resource'
I used the same code in ubuntu and have no errors at all.
I followed suggestions in stackoverflow answers and I have tried adding PYTHONPATH PYTHONHOME and edited the PATH environment variable.
I have no idea of what else I can do here.
Is there any file that I can download and install it in the Lib or site-packages folder of my python installation ?
resource is a Unix specific package as seen in https://docs.python.org/2/library/resource.html which is why it worked for you in Ubuntu, but raised an error when trying to use it in Windows.
I ran into similar error in window 10. Here is what solved it for me.
Downgrade to the Apache Spark 2.3.2 prebuild version
Install (or downgrade) jdk to version 1.8.0
My installed jdk was 1.9.0, which doesn't seem to be compatiable with spark 2.3.2 or 2.4.0
make sure that when you run java -version in cmd (command prompt), it show java version 8. If you are seeing version 9, you will need to change your system ENV PATH to ensure it points to java version 8.
Check this link to get help on changing the PATH if you have multiple java version installed.
Hope this helps someone, I was stuck on this issue for almost a week before finally finding a solution.
I'm struggling with executing a python script on my freenas (freebsd) environment.
I created a Jail, where I installed python via
pkg install python
and tried to execute the program with the command
python filename.py
But now its mentioning that it requires a specific module
ImportError: No module named simplejson
which I also installed via
pkg install ...
the next attempt to execute the script mentioned a different module.
Is it really the case for python, that you have to install each module per request from an executed program? Or is there a way to determine which module the 3rd party program needs and install it in upfront?
And how do you search for the corresponding module in the repo? Because for the missing sqlite3 module I had to write
pkg install databases/python-sqlite3
How do I get now the correct name for the simplejson module which is mentioned before?
Can you help me out there?
The first questions where already answered in the comments section. Here is the answer to the last question:
FreeBSD ports of python modules usually follow the convention of "py-" + modulename. The corresponding packages are usually named "py"+ python version + "-" + modulename
So it is py-sqlite3 and py-simplejson ports which install "py27-simplejson" and py27-sqlite3 for python 2.7.
Note: currently modules are only packaged for the default python version, for non-default python versions the modules have to be installed from the ports collection.
I got this simple problem and I can't find the answer anywhere, I'm wasting a lot of time!
I did a Python programm on Linux (which works OK), but when I try to run it on Windows, there are too problems with libs...
I have installed the libs I need (dateutil, lxml, xmlrpclib...) in C:\Python34\Lib\site-packages. But then, they don't work as they do on Linux. For example:
from dateutil.tz import tzlocal
Gives me next error:
File "C:\Python34\lib\site-packages\dateutil\tz.py", line 9, in module
from six import string_types, PY3 ImportError: No module named 'six'
That is, they are not finding the other modules... why???
Have you try this ?
http://www.instructables.com/id/How-to-install-Python-packages-on-Windows-7/
Maybe it can help
It looks like you're using Python 3.4 which comes with pip. pip is a tool for installing packages and any dependencies they might have (like the srting_types module from your error message). I'd suggest learning how to use it because it resolves most of the packaging problems with you needing to moving things around yourself. See an answer from a different question to learn more about pip.
There are some packages that need to be compiled. This can be difficult on Windows 7 if you don't have the proper toolchain set up to compile packages. I'd recommend Christoph Gohlke's wonderful collection of installable packages for Windows. You just need to make sure to grab the right version. Since 3.4 is still relatively new, some packages may not be available, so be warned.
I've been learning Python for several months but now finding some problems with my 2.7 installation as I've looked into modules such as nltk.
However, when I want to list modules using help ("modules) I have the main error which I think explains the problem is:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/distribute-0.6.28-py2.7.egg/setuptools/command/install_scripts.py:3: UserWarning: Module numpy was already imported from /Library/Python/2.7/site-packages/numpy-override/numpy/__init__.pyc, but /Library/Python/2.7/site-packages/numpy-1.8.0.dev_5c944b9_20120828-py2.7-macosx-10.8-x86_64.egg is being added to sys.path
from pkg_resources import Distribution, PathMetadata, ensure_directory
I also receive the following error to do with deprecated modules:
/Library/Python/2.7/site-packages/statsmodels-0.5.0-py2.7-macosx-10.8-intel.egg/scikits/statsmodels/__init__.py:2: UserWarning: scikits.statsmodels namespace is deprecated and will be removed in 0.5, please use statsmodels instead
I'm still trying to get to grips with paths. How can I avoid this issue in future?
You have installed packages under your operating system Python library. This is big no no. What you should have done is to create an isolated, disposable, Python environment with virtualenv tool:
http://opensourcehacker.com/2012/09/16/recommended-way-for-sudo-free-installation-of-python-software-with-virtualenv/
This way, when you upgrade your packages or need to get rid of them you can always reset the state of all of your Python packages by simply deleting the environment and creating new one.
Python packages installed via pip or easy_install commands are easy to install, but impossible to uninstall...
But when the damage has already happened you nede to manually try to clean up /Library/Python/2.7/site-packages/ by deleting files by and trying not to destroy your system Python in the process.