The document outlines a weekly Python hangout focused on various programming concepts, including basic syntax, control structures, functions, and modules. It also highlights advanced topics such as command-line arguments, debugging techniques, and iteration methods. The session encourages participants to ask questions and emphasizes debugging as an essential part of programming.

1. Python 45s #4
Weekly hangout by @AlSayed gamal
1

2. Last Hangouts
Language Basic Syntax.
Branching and Loops.
Functions.
Data Structures.
Exceptions.
Modules.
I/O and Files.
2

3. This hangout
Command Line Arguments
Advanced Iteration.
Debugging.
Next on Python45s
3

4. CLI Options
From optparse import
OptionParser
Short and long options.
actions and store actions
parser.print_help()

5. CLI Options (2)
option_list = [
make_option("-f", “--filename", action="store",
type="string", dest=“filename”)
,..
]
parser = OptionParser(option_list=option_list)

6. Advanced Iteration
Item0
List comprehension
Generator Expression
Generator Functions
next()
Item2
next()
Item ?
next()
Item1
next()
Item3

7. “If debugging is the process of removing
software bugs, then programming must be
the process of putting them in.”
–Edsger Dijkstra*
* http://en.wikipedia.org/wiki/Edsger_W._Dijkstra

8. Debugging
Find the bug first.
pdb
pdb.set_trace()

9. Next on 45s
As if you are watching MBC Action :)

10. Thank you
Don’t forget to post your question if any