PTW2015 Intro to Python

Intro to Python, borrowed from Boston Python Workshop

Transcript

1. Into to Python Instructor: Sarah Gray
2. About Me • Python and Ruby Lover • Software Engineer at • Regular Instructor at Girl Develop It Philly • Education Committee Member for Philly Python User Group
3. About You :) • Your name • What brought you here • What you hope to learn
4. The Plan 8:30 - 10:00 AM First Part 10:00 - 10:15 AM Short Break 10:15 AM - Noon Second Part
5. About Python -- Jargon Alert! • Invented in 1989 Guido Van Rossum • Duck Type Language • White Space Delimited • Derived from the C programming language • PEP8 • We are using Python 2, but 3 is on the near horizon • That’s it . . . jargon over :)
6. The Problem I have two lists of names -- one list is all VPN usernames, one list is all the people who are no longer employed. I want to write a script to tell me which VPN accounts to revoke based on who is no longer employed.
7. Data I have removed_users: bob@work.com suzie@work.com jen@work.com vpn_usernames: vpn-tim vpn-jen vpn-clarence goal: revoke_vpn for vpn-jen
8. Building Blocks -- Getting Started ▪ math ▪ type() ▪ variables ▪ strings ▪ booleans ▪ if/elif/else ▪ functions
9. Building Blocks -- Lists ▪ purpose ▪ initialization ▪ len() review ▪ accessing elements ▪ adding elements ▪ changing elements ▪ slicing lists ▪ strings are like lists
10. Building Blocks -- Loops and Flow Control ▪ for loops ▪ if statements inside for loops ▪ nested for loops ▪ range() ▪ while loops ▪ infinite loops ▪ if statements inside while loops ▪ break ▪ raw_input()
11. Building Blocks -- Dictionaries ▪ purpose ▪ initialization ▪ accessing elements ▪ adding elements ▪ changing elements ▪ keys() and values()
12. Building Blocks -- Modules ▪ purpose ▪ builtins ▪ imports ▪ import random ▪ random.randint ▪ random.choice
13. Yay! Our Results! def sanitized_vpn(vpn_username): return vpn_name[4:] def sanitized_email(email_address) : return email_address.split('@')[0] #so we know what the list vals are grads = ['bob@work.com', 'suzie@work.com', 'jen@work. com'] vpn = ['vpn-tim', 'vpn-jen', 'vpn-clarence'] #nested loop concept to compare two lists def revoke_addresses(grads, vpn): revoke = [] for email_address in grads: username = sanitized_email(email_address) vpn_username = "vpn-" + username if vpn_username in vpn: print "found it " + vpn_username revoke.append(vpn_username) return revoke
14. So, what now? • More Tutorials: ◦ https://www.python.org/about ◦ https://www.coursera.org/course/pythonlearn ◦ codingbat.com • Upcoming Classes: ◦ May 2/3 -- ◦ http://www.meetup.com/Girl-Develop-It- Philadelphia/events/221601923/ (almost sold out) ◦ May 29/30 -- PhillyPUG workshop TBA