Here is a post about installing a module in python3. When I use brew install python, then it installs it for 2.7.
When I use the method suggested by dan, which aimed to install it directly in python3 (who i really thank), but which didn't work :
# Figure out the path to python3
PY3DIR=`dirname $(which python3)`
# And /then/ install with brew. That will have it use python3 to get its path
PATH=$PY3DIR:$PATH brew install mapnik
The installation was successful but in python2. so I get:
For non-homebrew Python, you need to amend your PYTHONPATH like so: export PYTHONPATH=/usr/local/lib/python2.7/site-packages:$PYTHONPATH
so i finally add the path manually in python3 :
import sys
sys.path.append('/usr/local/lib/python2.7/site-packages')
I get this error :
Traceback (most recent call last): File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/mapnik/__init__.py", line 69, in <module>
from _mapnik import * ImportError: dlopen(./_mapnik.so, 2): Symbol not found: _PyClass_Type Referenced from: ./_mapnik.so
Expected in: flat namespace in ./_mapnik.so
Please help, I have spent so many hours on this ...
Thanks!!!
The Mapnik python bindings depend on boost_python. And both need to use the same python. The problem is likely that homebrew is providing a bottle of boost which includes boost python built against python 2.7 and not python 3.x.
Related
This is my first time asking on this site, so sorry if my question is not layed out correctly
y#DESKTOP-MQJ3NCT:~/Real-Time-Voice-Cloning$ python demo_toolbox.py
Traceback (most recent call last):
File "demo_toolbox.py", line 1, in <module>
from pathlib import Path
ImportError: No module named pathlib
I have tried:
pip3 install pathlib
and:
sudo -H pip3 install pathlib
but continue to get the same error
I am using the windows store version of ubuntu 18 LTS and python 3.7
When it comes to python, it's quite easy to make the mistake of just running "python ...". When you install python on windows "python" defaults to the python 2.7 installation ( probably changed now that 2.7 is no longer supported) if it is installed.
Ubuntu has the links "python2" and "python3" which makes so much more sense but can still lead to confusion.
If you have a local python Virtual environment, the "python" command defaults to the global install on windows (to further confuse people).
I find it generally best to create my own links to the global python "python27" and "python36" to avoid these confusions.
Same goes for pip. It's best to call
python3 -m pip install ...
Also. PyCharm is the most amazing Python IDE in the world and it helps with so much.
Sorry, turns out it was a simple mistake!
Instead of:
python demo_toolbox.py
I should have used
python3 demo_toolbox.py
As Linux defaults to Python 2 or something incompatible with pathlib
I have some problems installing pyflann in python 3.7.3, after execute:
pip install pyflann
The installation is successfully accomplished, but when I import the library and a run a python program, I got this error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "D:\Anaconda3\lib\site-packages\pyflann\__init__.py", line 27, in <module>
from index import *
ModuleNotFoundError: No module named 'index'
I'm using window 10. How can I fixed?
pyflann does not have support for python 3 yet, according to this GitHub issue. Your two options are:
Install the pyflann-py3 package:
pip install pyflann-py3
Or, you could take the advice from the issue and use 2to3:
sudo 2to3 -w D:\Anaconda3\lib\site-packages\pyflann
The pyflann package is not compatible with Python 3. It looks like
it is not actively maintained, the last commit was in February 2017:
https://github.com/primetang/pyflann/commits/master
There is an open issues documenting the problem:
https://github.com/primetang/pyflann/issues/1
There are a few open PRs trying to add Python 3 support that were never
merged:
https://github.com/primetang/pyflann/pulls
You might have better luck with one of the forks, but I can't vouch for them,
I've never used pyflann:
https://github.com/primetang/pyflann/network/members
I'm using a Kubernetes inventory builder script found here: https://github.com/kubernetes-sigs/kubespray/blob/master/contrib/inventory_builder/inventory.py
On line 36, the ruamel YML library is imported using the code from ruamel.yaml import YAML. This library can be found here: https://pypi.org/project/ruamel.yaml/
On my OSX device (Mojave 10.14.3), if I run pip list, I can clearly see the most up to date version of ruamel.yaml:
If I run pip show ruamel.yaml, I get the following output:
I'm running the script with this command: CONFIG_FILE=inventory/mycluster/hosts.ini python3 contrib/inventory_builder/inventory.py 10.0.0.1 10.0.0.2 10.0.0.4 10.0.0.5
Bizarrely, it returns the following error:
Traceback (most recent call last):
File "contrib/inventory_builder/inventory.py", line 36, in <module>
from ruamel.yaml import YAML
ModuleNotFoundError: No module named 'ruamel'
I have very little experience with Python, so don't understand how this could be failing. Have I installed the library incorrectly or something? From the documentation on the ruamel.yml project page, it looks like the script is calling the library as it should be.
Thanks in advance
In my case, I was installing this with pip3 install ruamel.yaml, and it was puting the package in /usr/local/lib/python3.9/site-packages/, but the python3 binary on the machine was pinned to Python 3.7, so trying to import that module was sending the ModuleNotFoundError message.
What helped to fix this, was to install the module with python3 -m pip install ruamel.yaml, running pip via the python3 binary makes sure it runs on the same version, in this case 3.7, and gets installed via the correct version number site-packages.
pip is set to point to the Python 2 installation. To install the library under Python 3, do pip3 install ruamel.yml.
you're using python 3 and want to use the package that is with python 2. Go to the directory where your python 3 is, navigate to Scripts and use the pip in there to install the needed library.
This helped me (adding version number to python):
CONFIG_FILE=inventory/mycluster/hosts.yaml python3.6 contrib/inventory_builder/inventory.py ${IPS[#]}
[python 3.10.x].
There is no package called ruamel.yaml
what worked is pip install ruamel-yaml
I use this tutorial text as an example, there are others:
#!/usr/bin/python
import MySQLdb
If it produces the following result, then it means MySQLdb module is not installed −
Traceback (most recent call last):
File "test.py", line 3, in <module>
import MySQLdb
ImportError: No module named MySQLdb
To install MySQLdb module, use the following command −
For Ubuntu, use the following command -
$ sudo apt-get install python-pip python-dev libmysqlclient-dev
I have gone trough these steps, more or less as described above.
Problem is that the subdirectory "python" does not exist under /usr/bin/
in my file system. I run Linux Mint 18.3. Python 2.7 seems to be the native version installed in Mint (used for several purposes), but I have also installed Python 3.6.4 and wish to use this for development purposes.
Does anyone know in which directory I could expect to find MySQLdb?
Since #!/usr/bin/python is non existent I wonder - has MySQLdb been properly installed? If it has, I have not after several efforts succeded in locating it.
This is the error I get when trying to import numpy on opening python (2.7.8):
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named numpy
This is the path of my python binary /usr/local/bin/python
This is the path of pip /usr/local/bin/pip
Also, when I put in pip freeze I found the numpy package numpy==1.8.0rc1
I have looked at other relevant questions, but I'm not able to diagnose the cause. I'm guessing it might be some problem in PATHS. Where do I start?
As Akshat pointed out in the comments above, I had multiple versions of Python installed. This could have been the effect of using homebrew and/or macports in the past. I followed the steps detailed in Too many pythons on my Mac OS X Mountain Lion
and did a fresh install of Python 2.7.12 I was then able to reinstall pip and the packages subsequently.