PyLadies San Diego and

San Diego Python User Group

present

Introduction to Python

Welcome to Intro to Python!

If you haven't already, please complete the short setup instructions at: http://bit.ly/intro-setup



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Please also visit: http://codeacademy.com

and create an account.

After completing these steps, you should:

Have Python installed
Be able to enter and exit Python
Have a Codeacademy account

Raise your hand (or place a yellow sticky note on your screen), if you need help.

The Game plan

Introductions, motivation
Interactive lecture: first steps with Python
Practice

Interactive lecture: lists and loops
Practice
Wrap-up and next steps

5 min Why Python is so great? (7 slides) while audience checks config

10 min Let's get started with the interactive lecture

Terminal and start python



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2 + 2



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1.4 + 2.25



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4 - 2



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2 * 3



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4 / 2



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1 / 2

Whole number 1 divided by whole number 2



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1.0 / 2



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2 + 2



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2+2



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(1 + 3) * 4



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x = 4



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x * 3

Variables



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cups_of_flour = 5



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cups_of_flour * .5



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1 / 2



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1.0 / 2

Two different data types

Let's use a function



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type(1)



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type(1.0)

Questions?

String data type



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"Hello"



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"Python, I'm your #1 fan!"



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type("Hello")



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name = "Carol"



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2 + 2



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"Carol" + "Willing"



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"Carol " + "Willing"



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"Carol" + " " + "Willing"



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name = "Carol"



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"My name is " + name

Tip - arrow up save typing



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"Hello" + 1



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"Hello" + "1"



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type(1)



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type("1")



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"Hello" + str(1)



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len("Hello")



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len(name)



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"The length of my name is " + str(len(name))



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"Hello"



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'Hello'



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"Python, I'm your #1 fan!"



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"A" * 40



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h = "Happy"



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b = "Birthday"



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(h + b) * 10

Printing - interactive vs file



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"Hello"



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print("Hello")

Questions?



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3 ** 3



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type(1)



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type(1.0)



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type("1")

Make choices



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True



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False



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type(True)



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type(False)



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0 == 0



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0 == 1



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0 != 1



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"a" == "A"



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1 > 0



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2 >= 3



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-1<0



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.5 <= 1



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"H" in "Hello"



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"x" in "Hello"



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"a" not in "abcde"



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type(True)



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type("True")



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type(true)



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x = 4



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x == 4



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if 6 > 5:
    print("Six is greater than 5")



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if 0 > 2:
    print("Zero is greater")



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if "banana" in "bananarama":
    print("I miss the 80s")

One of two actions



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sister = 15



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brother = 12



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if sister > brother:
    print("Sister is older")
else:
    print("Brother is older")



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1 > 0 and 1 < 2



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1 < 2 and "x" in "abc"



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"a" in "abc" and "b" in "abc" and "c" in "abc"



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"a" in "hello" or "e" in "hello"



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temp = 32



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if temp > 60 and temp < 75:
    print("Nice and cozy")
else:
    print("Too extreme for me")

One of three things



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sister = 15
brother = 15



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if sister > brother:
    print("Sister is older")
elif sister == brother:
    print("Twinsies!!")
else:
    print("Brother is older")

Questions? 47 min mark

Practice problems - Codeacademy practice Strings and choices http://bit.ly/py-practice



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from IPython.display import YouTubeVideo
# a tutorial about Python at PyCon 2014 in Montreal, Canada by Jessica McKellar
# Credit: William Stein.
YouTubeVideo('MirG-vJOg04')









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from IPython.display import IFrame
# Pull in the tutorial prep information from OpenHatch wiki
IFrame('http://bit.ly/intro-setup', width='100%', height=350)









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