LISTS, TUPLES, and Dictionaries

1. Boolean Expressions
2. IF/ELSE Statements
3. Lists
4. For Loops
5. While Loops
6. List Indexing

1. Write small chunks of code and then run it
2. Use print statements to figure out state and flow
3. pdb.set_trace()

Seriously, make sure 

that you do this exercise on your own!

Lists are data types or values in Python

They have built-in functions to perform actions such as:

sort (e.g. smallest to largest)

append (add item to end) 

insert (add item somewhere else)

convert to string

   a = "Some random string"   a[0] = "z"    ### This will fail because strings can't be changed   a = "z" + a[1:]     ### we must create a new string and re-assign to a

A very similar data type to Lists

A tuple is an ordered sequence of items

Instead of brackets, tuples are created with parentheses

We've seen tuples before with string interpolation

"This is %s an example of %s"  % ("good", "tuples")  my_sample_tuple = (1, "sample", 4, 9)

Difference with lists is that tuples are IMMUTABLE

Dictionaries are similar to Lists

They are mutable

Assignment and indexing is similar

They are NOT ordered

Instead they are lookup tables with keys and values

Each key is associated with a value

With the key, you "look up" that value

  chores = {"Monday": "rake yard", "Tuesday": "dentist appointment"}  print chores["Monday"]    # dictionaries have built-in functions, just like Lists  print chores.keys()  print chores.items()
  for day, assignment in chores.items():      print "On %s, I will %s" % (day, assignment)  
    chores["Wednesday"] = "wash clothing"
  print chores
  thursday_chore = chores.get("Thursday", "I have nothing planned")  print thursday_chore