[[Python3]]
 

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

python3 [2018/07/29 16:24]
dblume [Debian based distros]
python3 [2018/10/06 08:03] (current)
dblume [Modules]
Line 1: Line 1:
 ====== Python3 ====== ====== Python3 ======
  
-If I want Python 3.6, I have to compile it myself.  Use "dnf" for RedHat based distros and "apt-get" for Debian.+If I want Python 3.7, I have to compile it myself.  Use "dnf" for RedHat based distros and "apt-get" for Debian.
  
 ===== RedHat based distros ===== ===== RedHat based distros =====
Line 11: Line 11:
 </code> </code>
  
-Then on Fedora and macOS...+Then on Fedora and CentOS...
  
 <code bash> <code bash>
Line 17: Line 17:
 tar -xvf Python-3.7.0.tgz tar -xvf Python-3.7.0.tgz
 cd Python-3.7.0/ cd Python-3.7.0/
-./configure --prefix=/opt/python3 --enable-optimizations+./configure --prefix=/usr/local/bin/python3.7 --enable-optimizations
 make make
 sudo make install sudo make install
-# sudo ln -s /opt/python3/bin/python3 /usr/bin/python3+# sudo ln -s /usr/local/bin/python3.7/bin/python3 /usr/bin/python3
 </code> </code>
  
-===== Debian based distros =====+On my dev system at work, I seem to have configured a prefix like /opt/python3. Then when CentOS updates itself, it changes a symbolic link in /usr/bin/python3 
 + 
 +    sudo rm /usr/bin/python3 && sudo ln -s /opt/python3/bin/python3 /usr/bin/python3 
 + 
 +For **OS X**, brew upgrading httpie seems to upgrade to the latest Python 3, so I didn't have to do stuff. 
 + 
 +===== Debian based distros (Start) =====
  
 For Debian (eg., Rasbian) try [[http://www.unixmen.com/howto-install-python-3-x-in-ubuntu-debian-fedora-centos/|the following]] (on raspberry pi libssl-dev isn't available): For Debian (eg., Rasbian) try [[http://www.unixmen.com/howto-install-python-3-x-in-ubuntu-debian-fedora-centos/|the following]] (on raspberry pi libssl-dev isn't available):
  
 <code bash> <code bash>
-sudo apt-get install build-essential libncursesw5-dev libreadline-dev libssl-dev libgdbm-dev libc6-dev libsqlite3-dev tk-dev+sudo apt-get install build-essential libncursesw5-dev libreadline-dev libssl-dev libgdbm-dev libc6-dev libsqlite3-dev tk-dev libffi-dev
 </code> </code>
 +
 +==== (Aside) OpenSSL 1.0.1 issue in Raspbian ====
 +
 +On Raspbian Jessie the make command (below) may have output that looks like this:
  
 <code> <code>
Line 36: Line 46:
 </code> </code>
  
-On Raspbian, I put it in the default location:+On Raspbian, the pip module may not work because it relies on the ssl module. 
 + 
 +<code> 
 +pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available. 
 +</code> 
 + 
 +Python's setup.py explains: 
 + 
 +> Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host(). 
 + 
 +If you check the version of ssh: 
 + 
 +<code> 
 +$ openssl version 
 +OpenSSL 1.0.1t  3 May 2016 
 +</code> 
 + 
 +That OpenSSL is too old. So you may have to [[https://raspberrypi.stackexchange.com/questions/66782/how-to-install-openssl-1-0-2-on-raspberry-pi3/67045|make your own OpenSSL library]].
  
 <code bash> <code bash>
 +# Add the backport apt source.
 +echo "deb-src http://httpredir.debian.org/debian jessie-backports main contrib non-free" | \
 +      sudo tee /etc/apt/sources.list.d/jessie-backports.list
 +sudo apt update
 +
 +# Get the openssl source
 +apt-get source openssl/jessie-backports
 +
 +# Make and install it.
 +cd openssl-1.0.2k/
 +./config --prefix=/usr
 +make
 +make test
 +sudo make install
 +</code>
 +
 +**Update**: The following apt-cache policy command showed the old libssl was still installed. It's probably bad, but I [[https://my-take-on.tk/2018/09/10/installing-latest-python-3x-and-pip-on-any-debian-based-system/|installed the new one with apt install -t jessie-backports]].
 +
 +<code>
 +sudo apt-cache policy libssl-dev
 +</code>
 +
 +===== Debian based distros (Continued) =====
 +
 +Then, back to Python3, on Raspbian, I put it in the default location, /usr/local:
 +
 +<code bash>
 +screen  # Because using optimizations will take hours
 cd Python-3.7.0/ cd Python-3.7.0/
 ./configure --enable-optimizations ./configure --enable-optimizations
-make+make -j4
 sudo make install sudo make install
 +[[ $TERM != "screen" ]] || exit  # exit if in screen session
 +</code>
 +
 +===== Modules =====
 +
 +Sometimes I have trouble with pip3 (ImportError: cannot import name 'main' from 'pip'), so prefer to use "python3 -m pip" instead.
 +
 +<code bash>
 +sudo -H python3 -m pip install --upgrade pip
 +sudo -H python3 -m pip install requests
 +sudo -H python3 -m pip install numpy
 +sudo -H python3 -m pip install matplotlib
 +python3 -m pip install --user --upgrade httpie
 +</code>
 +
 +===== Weird hack for impyla =====
 +
 +Refers to https://stackoverflow.com/questions/43918993/python-buildpack-fatal-error-sasl-sasl-h-no-such-file-or-directory
 +
 +<code bash>
 +sudo python3 -m pip install --no-deps impyla
 +sudo python3 -m pip install --no-deps git+https://github.com/snowch/thrift_sasl
 +# sudo python3 -m pip install thriftpy
 </code> </code>
python3.1532906653.txt.gz · Last modified: 2018/07/29 16:24 by dblume
 
Recent changes RSS feed Driven by DokuWiki