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Python Notes
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chromedriver-binary # /usr/local/bin/pip3 install chromedriver-binary # /usr/local/bin/pip3 install pip-upgrade-outdated # pip-upgrade-outdated # find /usr -name "chromedriver" /usr/lib/python3.6/site-packages/chromedriver /usr/local/lib/python3.6/site-packages/chromedriver_binary/chromedriver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:
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chromedriver pip3.6 install chromedriver_binary pip3.6 install dictor pip3.6 install wget pip3.6 install pip-upgrade-outdated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Note that https://pypi.org/project/pip-upgrade-outdated/ is a good resource to update all PIP packages.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 about Python database access
Python3.7 on Fedora 28:
- dnf install python37
- 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
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')