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--- python_notes [2017/08/29 08:36] – created juckins
+++ python_notes [2020/04/08 14:40] – juckins
@@ Line 1: / Line 1: @@
 ==== Python Notes ====
-Use "pip" to manage python packages.
+__8 April 2020__
+Upgraded Chrome via yum to version 81.0.4044.92 and now check_envoy.pl fails.
+__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+  # /usr/local/bin/pip3 install pip-upgrade-outdated
+  # pip-upgrade-outdated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" -exec ls -l {} \;
+  /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...needs to be fixed.
+----
+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://janikarhunen.fi/how-to-install-python-3-6-1-on-centos-7.html
+Do some local configuration for my scripts (su - root):
+  pip3.6 install --upgrade pip
+  pip3.6 install --upgrade httplib2
+  pip3.6 install pymysql
+  pip3.6 install selenium-wire
+  pip3.6 install chromedriver
+  pip3.6 install chromedriver_binary
+  pip3.6 install dictor
+  pip3.6 install wget
+  pip3.6 install pip-upgrade-outdated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+Note that https://pypi.org/project/pip-upgrade-outdated/ is a good resource to update all PIP packages.
+Download and install geckodriver (see https://github.com/mozilla/geckodriver/releases)
+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 about [[https://www.tutorialspoint.com/python3/python_database_access.htm|Python database access]]
+Python3.7 on Fedora 28:
+  * dnf install python37
+  * wget https://bootstrap.pypa.io/get-pip.py
+  * python3.7 get-pip.py
+  * python3.7 -m pip install requests
+Use "pip" to manage python packages:
   # yum install python2-pip
+To list installed python modules:
-  # 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]]