Christopher Juckins

SysAdmin Tips, Tricks and other Software Tools

User Tools

Site Tools


python_notes

Differences

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

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
Next revisionBoth sides next revision
python_notes [2019/09/11 17:05] juckinspython_notes [2019/12/11 13:48] juckins
Line 1: Line 1:
 ==== Python Notes ==== ==== Python Notes ====
      
-Install Python 3.6 on CentOS 7:+__11 December 2019__ 
 + 
 +Upgraded Chrome via yum to version 79.0.3945.79 and now check_envoy.pl fails. 
 + 
 +Did the following as root to fix: 
 + 
 +  # /usr/local/bin/pip3 uninstall chromedriver-binary 
 +  # /usr/local/bin/pip3 install chromedriver-binary 
 +  # /usr/local/bin/pip3 install pip-upgrade-outdated 
 +  # pip-upgrade-outdated 
 +   
 +  # find /usr -name "chromedriver" 
 +   
 +  /usr/lib/python3.6/site-packages/chromedriver 
 +  /usr/local/lib/python3.6/site-packages/chromedriver_binary/chromedriver 
 + 
 +  # chmod 755 /usr/local/lib/python3.6/site-packages/chromedriver_binary/chromedriver 
 + 
 +Note that both **/usr/bin/pip3.6** and **/usr/local/bin/pip3.6** exist on the system now. 
 + 
 + 
 + 
 +---- 
 + 
 +With CentOS7.7, python3 can load from base.  Do the following to fix previously-installed IUS release: 
 + 
 +  # yum remove python36u 
 +  # yum install python3 
 +  # yum remove ius-release 
 + 
 +  * Then follow instructions for installing local python packages to ensure all still work.   
 +  * If you have pip problems, uninstall/reinstall using instructions at https://pip.pypa.io/en/stable/installing/ 
 +  * Ensure pip3.6 is in your $PATH or you have a sym link to it (/usr/local/bin) in /usr/bin 
 + 
 +__Install Python 3.6 on CentOS 7__:
   * https://linuxhint.com/install_python3_centos7/   * https://linuxhint.com/install_python3_centos7/
   * https://janikarhunen.fi/how-to-install-python-3-6-1-on-centos-7.html   * https://janikarhunen.fi/how-to-install-python-3-6-1-on-centos-7.html
Line 16: Line 50:
   pip3.6 install pip-upgrade-outdated   pip3.6 install pip-upgrade-outdated
      
 +To update all pip packages:
 +
 +  # pip_upgrade_outdated
 +
 Note that https://pypi.org/project/pip-upgrade-outdated/ is a good resource to update all PIP packages. Note that https://pypi.org/project/pip-upgrade-outdated/ is a good resource to update all PIP packages.
      
 Download and install geckodriver (see https://github.com/mozilla/geckodriver/releases) Download and install geckodriver (see https://github.com/mozilla/geckodriver/releases)
  
-As root, copy geckodriver to /usr/local/bin+As root, copy geckodriver to /usr/local/bin and ensure permissions are 755
  
 Notes at https://stackoverflow.com/questions/40208051/selenium-using-python-geckodriver-executable-needs-to-be-in-path Notes at https://stackoverflow.com/questions/40208051/selenium-using-python-geckodriver-executable-needs-to-be-in-path
Line 39: Line 77:
      
   $ pip list   $ pip list
 +  
 +[[https://docs.python.org/3/howto/logging.html|Logging in python]]
 +
 +  logging.basicConfig(format='%(asctime)s %(message)s', filename=log_file, level=logging.DEBUG)
 +  logging.debug('This message should go to the log file')
 +  logging.info('So should this')
 +  logging.warning('And this, too')
 +
 +
 +[[https://realpython.com/python-pep8/|Write beautiful python code with PEP-8]]
python_notes.txt · Last modified: 2023/04/05 08:56 by juckins