snippets.adoc

Python::snippets

Table of Contents

• Main program structure
• Find first element in a sequence that matches a predicate
• List files
• check a variable exists
• web server

Main program structure

link:snippets.py[role=include]

see code at snippets.py

Find first element in a sequence that matches a predicate

 — from: stackoverflow

finding first

next((x for x in range(10) if x > 3), 'not found')
# will return 4

will return the first number from 0 to 10 above 3, ie 4.

not finding

next((x for x in range(10) if x > 10), 'not found')
# will return 'not found'

there is no number above 10 in range(10), returns "not found" in that case.

List files

see path

check a variable exists

local	global	attribute of an object
'myVar' in locals()	'myVar' in globals()	hasattr(obj, 'attr_name')

web server

python -m http.server 8000