问题
I use Python 3.6 in an anaconda environment. I installed GDBM with
conda install gdbm
The installation went well, however I can't use dbm.gnu
from Python:
ModuleNotFoundError: No module named '_gdbm'
It seams that Python doesn't include the _gdbm
module, even if GDBM is actually installed.
Is this a known problem? How can I fix it?
Thanks!
回答1:
I faced this issue as well. This is probably not the ideal way, but it works. I did the following to resolve this -
sudo apt-get install python3-gdbm
This installs the gdbm library for python3, however since apt-get and anaconda are two independent package managers; this isn't going to solve your problem. We primarily do this to get a hold of the .so shared library which we will place in the right folder in our anaconda installation. Next we find the location of the .so file using -
dpkg -L python3-gdbm
This gives us the following output -
/.
/usr
/usr/lib
/usr/lib/python3.5
/usr/lib/python3.5/lib-dynload
/usr/lib/python3.5/lib-dynload/_gdbm.cpython-35m-x86_64-linux-gnu.so
/usr/share
/usr/share/doc
/usr/share/doc/python3-gdbm
/usr/share/doc/python3-gdbm/copyright
/usr/share/doc/python3-gdbm/changelog.Debian.gz
/usr/share/doc/python3-gdbm/README.Debian
The file we require is here -
/usr/lib/python3.5/lib-dynload/_gdbm.cpython-35m-x86_64-linux-gnu.so
Copy this file to the lib-dynload folder of your anaconda installation; for me this was -
cp /usr/lib/python3.5/lib-dynload/_gdbm.cpython-35m-x86_64-linux-gnu.so /home/username/anaconda3/lib/python3.5/lib-dynload
Note, that this will only work if the directory the .so
was copied to is in python's sys.path
. To find the correct directory to copy to, assuming you're inside the activated conda environment, run:
python -c 'import sys; [print(x) for x in sys.path if "lib-dynload" in x]'
For example, in my case, the directory was inside the environment path and not in the anaconda main library. ~/anaconda3/envs/myenvname/lib/python3.7/lib-dynload
Now try importing the module in python -
from _gdbm import *
or testing it from the command line:
python -m dbm.gnu
This should have fixed your problem.
Please note, mine is an Ubuntu-16.06 OS and my python version is 3.5.2. The .so file may work with python3.6 as well, if not you can try installing python3.6-gdbm, although a quick search for ubuntu 16.04 didn't give me any results.
回答2:
Although the question is for Python3, I got here while trying to install gdbm
on Python2 so I post my answer as it may be useful for others. The correct command was conda install python-gdbm
. Although conda install gdbm
went through, the module couldn't be imported. As per here, however, this may not work for Python3.
来源:https://stackoverflow.com/questions/49113718/gdbm-doesnt-work-with-python-3-6-and-anaconda