Python

• uv
• Django

Links

• https://learnxinyminutes.com/docs/python/
• https://github.com/amontalenti/elements-of-python-style
• https://github.com/realpython/discover-flask
• https://pythonprogramming.net/basic-gui-pyqt-tutorial/
• Project Layout: http://docs.python-guide.org/en/latest/writing/structure/
• https://mitelman.engineering/blog/python-best-practice/automating-python-best-practices-for-a-new-project/

Local Docs

pydoc3 -b

Download https://docs.python.org/3/download.html and run webserver in the folder.

Oneliners

python -m http.server

IPython

# Autoreload imports
%load_ext autoreload
%autoreload 2

# Debugger
%pdb on
%pdb off

Debugger/PDB

• https://pymotw.com/2/pdb/
• Documentation
• Debugger Commands
• Blog Post
• Interactive PDB

python -m pdb myscript.py

import pdb; pdb.set_trace()

• Debugger Commands
  • h(elp)
  • step
  • next
  • continue
  • list; ll
  • args
  • p or pp
  • interact (Quit with Ctrl + d)
  • up/down
• Setting a Breakpoint:

b myscript.py:10
b function
b requests/sessions.py:555

• Use debugger in IPython:
• %debug
• %pdb

%debug function()
%pdb on
%pdb off

Argparse

• Documentation
• Example:

def parse_args(args=sys.kwargs[1:]):
	parser = argparse.ArgumentParser()
	parsed_args = parser.parse_args(args)
	return args

Try Except

try:
    # Use "raise" to raise an error
    raise IndexError("This is an index error")
except IndexError as e:
    pass    # Pass is just a no-op. Usually you would do recovery here.
except (TypeError, NameError):
	pass    # Multiple exceptions can be handled together, if required.
else:   # Optional clause to the try/except block. Must follow all except blocks
	print "All good!"   # Runs only if the code in try raises no exceptions
finally: #  Execute under all circumstances
	print "We can clean up resources here"

Logging

• Howto

• Advanced

  Base Template:

import logging

logger = logging.getLogger(__name__)
# in main():
logging.basicConfig(level=logging.DEBUG)