If you need to add a progress bar in a python script, while you slowly loop over some items: before starting creating your own, save your time and consider tqdm.
So for example, something like this:
from tqdm import tqdm
for pages in tqdm(mypages[myissue], unit='page'):
process_my_page()You can customize quite a lot of things (like labels, units, position, color, etc) so check the fine manual.
It is THAT simple!
If you are using python you know the pain of keeping your system in a clean state. Usually your OS will come with some python(s) by default, but very easily you discover you need some extra modules that you’ll have to install with pip. And from here you go on a slippery slope and end up with 5 pythons, modules installed in 10 different locations and random conflicts that will puzzle you.
In order to “fix” this the recommended way is to use a separate virtual environment for your projects, or one virtual environment per project, where you install only the modules you need without making the OS “dirty”. Making use of this would be something like this:
$ python3 -m venv myenv
$ source myenv/bin/activate
(myenv) $ pip3 --version
pip 20.2.3 from /Users/me/myenv/lib/python3.9/site-packages/pip (python 3.9)
(myenv) $ deactivate
$ pip3 --version
pip 20.2.4 from /usr/local/lib/python3.9/site-packages/pip (python 3.9)Now, if you’re lazy, you already see a problem here: you need to remember to load this special environment every time, and then to unload it. Enter direnv.
After you install direnv (on MacOS that would be an easy “brew install direnv”), you need to hook it to your bash. For this, you need to add something like this to your .bashrc:
eval "$(direnv hook bash)"Now go ahead and create an .envrc file in your project folder that will manage the new virtualenv for you. You need to accept the new .envrc file first (this is for security reasons, otherwise you might end up with a wiped laptop after you do a git pull from some malicious repo), and after this magic will happen: the virtualenv will be automatically loaded whenever you enter that folder, and automatically unloaded when you exit it.
$ cd myproject
$ echo "layout_python3" > .envrc
direnv: error /Users/me/myproject/.envrc is blocked. Run `direnv allow` to approve its content
$ direnv allow
direnv: loading ~/myproject/.envrc
direnv: export +VIRTUAL_ENV ~PATH
$ pip3 --version
pip 20.2.3 from /Users/me/myproject/.direnv/python-3.9.0/lib/python3.9/site-packages/pip (python 3.9)
$ cd ..
direnv: unloading
$ pip3 --version
pip 20.2.4 from /usr/local/lib/python3.9/site-packages/pip (python 3.9)
$ cd myproject/
direnv: loading ~/myproject/.envrc
direnv: export +VIRTUAL_ENV ~PATH
$ pip3 --version
pip 20.2.3 from /Users/me/myproject/.direnv/python-3.9.0/lib/python3.9/site-packages/pip (python 3.9)It’s magic!