Week 7: Python Storytelling
Review
- Conditions
- User input
Discussion
- Mathematical operators
- Operators can manipulate values (operands)
- Arithmetic operators
- +, -, *, **, /, %
- Comparison (relational) operators
- ==, !=, >, <, >=, <=
- Assignment operators
- ▪ =, +=, -=, *=, /=
| Addition | + | a + b = 10 |
| Subtraction | – | x – y = -5 |
| Multiplication | * | a * b = 20 |
| Exponent | ** | x3 = 8 |
| Division | / | b / a = 10 |
| Modulus | % | b % a = 2 |
- Lists
- A sequence of values, grouped together under a single name
- Access values by referencing their position in the list
- i.e.
- names = [“Jacob”, “Joanna”, “Kathy”]
- names[1] = “Joanna”
Lesson
| Countdown Operators | |
| import time def count_down(): sec = 10 for count in range(sec): print(sec) sec -= 1 time.sleep(1) return | 10 9 8 7 6 5 4 3 2 1 |
Practice
- Mad Libs: Create a function which prints out a story, filled in with words provided by the user. Ask your classmates to fill in words to complete the story.
| Mad libs (Lists) | |
| def mad_libs(words): print(“Once upon a time in the land of ” + words[0] + “, people became confused. ” + “There were so many ” + words[1] + “, but not enough ” + words[2] + “.”) return | Enter a place: Candy Land Enter a thing(plural): coconuts Enter a thing(plural): beluga whales Once upon a time in the land of Candy |
| words = [“”, “”, “”] categories = [“place”, “thing(plural)”, “thing(plural)”] for count in range(len(categories)): words[count] = input(“Enter a ” + categories[count]) | Land, people became confused. There were so many coconuts, but not enough beluga whales. |