Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [python3]

380 questions
346
votes
10 answers

Change the Python3 default version in Ubuntu

I am using Ubuntu 16.04 LTS . I have python3 installed. There are two versions installed, python 3.4.3 and python 3.6 . Whenever I use python3 command, it takes python 3.4.3 by default. I want to use python 3.6 with python3. python3 --version shows…
codeclue
  • 3,573
  • 3
  • 9
  • 6
109
votes
6 answers

zipimport.ZipImportError: can't decompress data; zlib not available

On RHEL 6.6, I installed Python 3.5.1 from source. I am trying to install pip3 via get-pip.py, but I get Traceback (most recent call last): File "get-pip.py", line 19177, in main() File "get-pip.py", line 194, in main …
Flair
  • 1,191
  • 2
  • 7
  • 6
33
votes
8 answers

Is there something wrong with my script or is Bash much slower than Python?

I was testing the speed of Bash and Python by running a loop 1 billion times. $ cat python.py #!/bin/python # python v3.5 i=0; while i<=1000000000: i=i+1; Bash code: $ cat bash2.sh #!/bin/bash # bash v4.3 i=0 while [[ $i -le 1000000000…
Alex Jones
  • 6,223
  • 17
  • 51
  • 83
32
votes
2 answers

How to run a command inside a virtualenv using systemd

I believe this should be simple but I can't get it to work properly. These are the commands I can run on command line: cd /home/debian/ap # Start a virtualenv source venv-ap/bin/activate # This needs to happen inside the virtualenv and takes ~20…
sscirrus
  • 475
  • 1
  • 6
  • 10
29
votes
4 answers

How to make python3.7 default

I have installed python3.7 however I am not sure how to make it the default python. See below: ~/Documents/robosuite$ python3.7 Python 3.7.1 (default, Oct 22 2018, 11:21:55) [GCC 8.2.0] on linux Type "help", "copyright", "credits" or "license" for…
piccolo
  • 393
  • 1
  • 3
  • 5
22
votes
4 answers

gcc error installing psycopg2 package for python3 on Centos 7.3

As per this answer, I performed a series of prerequisite setups to be ready to pip install python3 packages. However, when I ran python3 -m pip install psycopg2 I got the following error: Downloading/unpacking psycopg2 Downloading…
amphibient
  • 12,222
  • 18
  • 62
  • 87
17
votes
4 answers

cron job to run under conda virtual environment

I have a Anaconda Python Virtual Environment set up and if I run my project while that virutal environment is activated everything runs great. But I have a cronjob configured to run it every hour. I piped the output to a log because it wasn't…
MetaStack
  • 371
  • 1
  • 3
  • 10
15
votes
1 answer

Difference between installing a package with 'apt' and 'pip'

I have been trying to install a Python module which relies in setuptools, and apparently the module was installed using apt. However, it seems to be the wrong version, so I tried to install it using pip just to see if anything changes (spoiler:…
bert
  • 255
  • 8
15
votes
1 answer

"ModuleNotFoundError: No module named 'apt_pkg'" appears in various commands

I get the following error in various situations, for example when I try to start a package that is not installed: $ tldr Traceback (most recent call last): File "/usr/lib/command-not-found", line 28, in from…
Gal
  • 521
  • 1
  • 4
  • 8
12
votes
5 answers

Change location of `~/.python_history`

I want to keep the functionality, but change the location of ~/.python_history to $XDG_DATA_HOME/python/python_history. This gave me the following idea: I could create $XDG_CONFIG_HOME/python/pythonrc and point $PYTHONSTARTUP to it. In there I want…
maddingl
  • 554
  • 1
  • 6
  • 20
10
votes
1 answer

CentOS python3 package difference between python36 and python36u

I'm seeing 2 packages for Python 3 with the same name, when using search: $ yum search python36 And I'm not sure what's the difference between them? Why have 2? python36.x86_64 : Interpreter of the Python programming language and python36u.x86_64…
Bohdan
  • 145
  • 1
  • 6
10
votes
3 answers

Alternative to the now deprecated rfcomm binary in bluez

Since bluez 5.44, the rfcomm binaries contained in bluez-utils (amongst others like hcitool) are considered deprecated and are from now on only included in the bluez-utils-compat package provided by the AUR. Is there a similar command-line…
eike
  • 478
  • 4
  • 15
9
votes
2 answers

How to make `python` an alias of `python3` systemwide on Debian

The latest updates of my Debian testing system removed Python version 2, and I only have Python 3 installed, with python3. There is no longer any command named python. This causes several scripts to fail, including scripts compatible with Python…
a3nm
  • 8,978
  • 5
  • 28
  • 36
8
votes
2 answers

How to downgrade python version in Ubuntu 20.04?

I need to change my python version from 3.8 to 3.6 ? How can I achieve this in Ubuntu 20.04. I tried pyenv, but when I try to use pyenv like pyenv global 3.6.0 then I do python3 and I have still 3.8 verision.
Brokolicový Džuß
  • 205
  • 1
  • 2
  • 6
8
votes
3 answers

How to change python default version from 2.7 to 3.7 on RHEL 7

How to change python default version from 2.7 to 3.7 on RHEL 7. Installed python on RHEL7 virtual machine by following this https://tecadmin.net/install-python-3-7-on-centos/ When I check python version it still prints old version.
itgeek
  • 229
  • 1
  • 6
  • 11
1
2 3
…
25 26