I use a DigitalOcean server running Ubuntu 16.04, and I have used networkx before with Python3. But when I tried to import networkx today, I received a syntax error.
$ python3
Python 3.5.2 (default, Oct 7 2020, 17:19:02)
[GCC 5.4.0 --------] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> import networkx as nx
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.5/dist-packages/networkx/__init__.py", line 23
f"{release.authors['Hagberg'][0]} <{release.authors['Hagberg'][1]}>\n"
^
SyntaxError: invalid syntax
I also tried to uninstall and reinstall networkx, but I now get other syntax errors.
$ sudo pip3 uninstall networkx
Traceback (most recent call last):
File "/usr/local/bin/pip3", line 7, in <module>
from pip._internal.cli.main import main
File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
... on the attempt at install :
$ sudo pip3 install networkx
Traceback (most recent call last):
File "/usr/local/bin/pip3", line 7, in <module>
from pip._internal.cli.main import main
File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
I researched online, and I saw that I needed to do updates, which I ran.
sudo apt update
sudo apt upgrade
sudo apt-get install python3-pip python3-dev
But these errors continue. Is there a dependency file I need to go in and manually change to Python3.5 ? I saw that somewhere. It feels like this is a stupid problem, and these are the kinds that always trip me up. Any help would be greatly appreciated. Thank you.
I had to uninstall networkx and reinstall the prior version. That solved the issue.
$ sudo pip3 uninstall networkx
$ sudo pip3 install networkx==2.4
I was then able to run python3 and import networkx.
The bug was apparently from the current version of networkx (2.5). (I found this solution after I attempted a python uninstall/install, which crashed my server, and I was forced to restore to a prior back-up.) Don't ask me why this happened.
Related
I am getting the following error when trying run the example hello_world.py.
Traceback (most recent call last):
File "/usr/share/bcc/examples/hello_world.py", line 9, in <module>
from bcc import BPF
ImportError: cannot import name BPF
I installed bcc from source (link).
I also installed both the python bcc bindings packages, python-bcc and python3-bcc but no luck.
I am running Ubuntu 18.04 and kernel version 4.15.0-117-generic.
What am I missing here?
In ubuntu 20.04, I execute the following command to fix it.
sudo apt-get install bpfcc-tools linux-headers-$(uname -r)
I got the issue. I was using the pyenv to manage my python versions, so the python was looking files in the wrong locations.
$ python -c 'import site; print(site.getsitepackages())'
['/home/sagar/.pyenv/versions/3.6.6/lib/python3.6/site-packages']
I tried with a python3 command, which was not installed by pyenv and I don't get the above error.
While Installing Man in the Middle Framework (MITMf) i get an ImportError:No Module named capstone..
Although Capstone is already installed in my Kali Machine
I downloaded MITMf from https://github.com/byt3bl33d3r/MITMf
Heres what i get
root#kali:~/Desktop/MITMf# python mitmf.py --help
Traceback (most recent call last):
File "mitmf.py", line 36, in <module>
from plugins import *
File "/root/Desktop/MITMf/plugins/filepwn.py", line 72, in <module>
from libs.bdfactory import pebin
File "/root/Desktop/MITMf/libs/bdfactory/pebin.py", line 49, in <module>
from intel.intelCore import intelCore
File "/root/Desktop/MITMf/libs/bdfactory/intel/intelCore.py", line 38, in <module>
from capstone import *
ImportError: No module named capstone
root#kali:~/Desktop/MITMf# pip install capstone
Requirement already satisfied: capstone in /usr/lib/python3/dist-packages (3.0.5)
root#kali:~/Desktop/MITMf#
You need to install the python2.7 version of capstone. It looks like your python installation is a little weird. On Debian systems such as Kali, pip should be the installer for python2 packages and pip3 should be the installer for python3 packages.
From the pip man page:
On Debian, pip is the command to use when installing packages for Python 2, while pip3 is the command to use when installing packages for Python 3.
You probably should fix your pip installation by linking pip2 to pip. The way we do this is removing the pip binary and creating a symlink from pip2:
[k#box]$ sudo rm /usr/bin/pip
[k#box]$ sudo ln -s /usr/bin/pip2 /usr/bin/pip
Then you should be able to install the python2.7 version with pip
[k#box]$ pip install capstone
Explanation:
You have installed the python3.6 version of capstone. You can see in the output of your pip install command:
root#kali:~/Desktop/MITMf# pip install capstone
Requirement already satisfied: capstone in /usr/lib/python3/dist-packages (3.0.5)
If you look at the script mitmf.py, you will notice that the top line specifies python2.7
[k#box]$ head -n3 mitmf.py
#!/usr/bin/env python2.7
# Copyright (c) 2014-2016 Moxie Marlinspike, Marcello Salvati
I just installed the full & latest (November 2017) raspbian to try out gpiozero. My simple python3 script that I try to run is this:
python3 test.py
from gpiozero import LED, Button
from signal import pause
led = LED(17)
button = Button(3)
button.when_pressed = led.on
button.when_released = led.off
pause()
but it gives me
Traceback (most recent call last):
File "test.py", line 1, in <module>
from gpiozero import LED, Button
File "/home/pi/gpiozero.py", line 1, in <module>
from gpiozero import LED
ImportError: cannot import name 'LED'
So it is just not able to see the lib. By now I've checked apt-get and also tried pip for 2.7 and pip3 for python 3 but it's just not found? Must be super simple...
I know it is almost a year old question, but I found the answer.
Uninstall the pip and pip3 libraries
sudo pip uninstall gpiozero
sudo pip3 uninstall gpiozero
and install the library through apt
sudo apt-get update && sudo apt-get install python3-gpiozero python-gpiozero
that worked for me
You have another file called gpiozero.py, and so your from gpiozero import LED tries to import it from that file, not from the libraries path.
You can tell because in your traceback it says /home/pi/gpiozero.py:
File "/home/pi/gpiozero.py", line 1, in <module>
from gpiozero import LED
ImportError: cannot import name 'LED'
Rename your file to something else, and it will work.
I'm using Ubuntu 17.04 on Dell Laptop.
I'm trying to install the cloudstorage module.
When installing the module with Python2 using sudo, it works, however on importing it fails:
python storage2.py
Traceback (most recent call last):
File "storage2.py", line 6, in
import cloudstorage as gcs
File "/home/maxim/.local/lib/python2.7/site-packages/cloudstorage/init.py", line 56
def get_driver(driver: DriverName) -> Drivers:
Also, when I try installing this module with Python3 it fails:
https://apaste.info/QKYD
Why the import fails and how to fix it?
How to install this module in Python3?
I have followed the tutorial for installing Geodjango on my Ubuntu 14.04. I am using Django 1.10 and Python 3.5, postgres-9.6 and postgis 2.3.
I have checked here and here, but found no solution.
In a newly installed ubuntu 14.04 Virtual Machine, it worked.
But in my installation, when I tried making migrations, I got:
OSError: /usr/lib/libgdal.so.1: undefined symbol: sqlite3_column_table_name
Investigating a bit further, I tried simply:
from django.contrib.gis import gdal
And got:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/__init__.py", line 49, in <module>
from django.contrib.gis.gdal.driver import Driver # NOQA
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/libgdal.py", line 48, in <module>
lgdal = CDLL(lib_path)
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/ctypes/__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
OSError: /usr/lib/libgdal.so.1: undefined symbol: sqlite3_column_table_name
Is there any suggestions on how I could repair my setup?
UPDATE
It seems to be a problema with my conda environment. When I started using a pip virtualenv, the problem did not arise anymore. I am not answering the question, because I could not find the solution, only a workaround. But rebuilding the environment with pip virtualenv works.
In conda environment: conda install -c conda-forge gdal=2.2.1
In django settings.py:
GDAL_LIBRARY_PATH = '<HOME>/anaconda3/envs/<env_name>/lib/libgdal.so'
I was having this issue as well and the specifying
GDAL_LIBRARY_PATH = <HOME>/anaconda3/envs/<env_name>/lib/libgdal.so
(in project.settings or os.environ.setdefault) led to
libicui18n.so.56: cannot open shared object file: No such file or directory.
The fix that worked for me was to upgrade icu:
conda install -c conda-forge icu=58
Upgrading icu lead to some changes in other package versions as well (qt downgraded from 5.6.2-4 to 5.6.2-3, the rest upgraded).
I simply run under my conda environment:
conda install gdal
Guy de Carufel's solution did not work for me, though he pointed to a correct direction, thanks
Have you built SQLite from source? Then, you forgot to enable Column metadata. Recompile SQLite with
CFLAGS="-DSQLITE_ENABLE_COLUMN_METADATA=1" ./configure
make
sudo make install
Have fun using the cutting edge SQLite.
Reference - https://www.sqlite.org/compile.html#enable_column_metadata