Variables:

  • make them specific but short and easy to read/write repeatedly
  • differentiate words w capital letters
  • dont make them vague, dont use single letters as variables
  • NO SPACES

Types of Data:

  • integer: numbers
  • string: words/text -boolean: determines if something is true or false

Assignments:

- allows the program to change the value of a variable 

num1 = 15 
num2 = 25 
num3 = 42
num2 = num3 
num3 = num1 
num1 = num2

print(num1)
print(num2)
print(num3)

42
42
15

Data Abstraction

  • method used to represent data in a useful way
  • only displays data relevant to the situation
  • managing complexity

Using lists as data abstractions

  • store multiple elements together
  • allows multiple related values to be treated as one things

List operations:

  • assigning values to a list
  • assigning an empty list to a variable (to be used later on)
  • Assigning a copy of one list to another list

Managing complexity

  • can be read easier
  • easier to find issues in code or can be updated early on
  • lists help because they limit the amount of variables needed and can be easily changed
colors = ["green", "red", "pink", "purple", "blue", "brown"]
for x in colors:
    print(x)

green
red
pink
purple
blue
brown

Homework Assignment: Using lists to create a Database 

print("Hello. Which dog breed would you like to know about?")
print("options: golden retriever, labrador, husky, border collie, german shepard")

#golden retriever 
GoldR_DB = {
    "Breed": "Golden Retriever",
    "Life span": "10-12 years",
    "Temperament": ["Intelligent, Reliable, Kind, Trustworthy"],
    "Weight": "55-75 lbs",
    "Height": "20-24 in",
}

#labrador  
Lab_DB = {
    "Breed": "Labrador",
    "Life span": "10-12 years",
    "Temperament": ["Outgoing, Agile, Intelligent, Trustworthy"],
    "Weight": "55-71 lbs",
    "Height": "22-24 in",
}

#husky  
Husky_DB = {
    "Breed": "Husky",
    "Life span": "10-16 years",
    "Temperament": ["Loyal, Playful, Intelligent, Friendly"],
    "Weight": "44-66 lbs",
    "Height": "22-24 in",
}

#border collie 
BordColl_DB = {
    "Breed" : "Border Collie",
    "Life span" : "10-17 years",
    "Temperament" : ["Energetic, Keen, Alert, Athletic"],
    "Weight": "27-45 lbs",
    "Height": "19-22 in",
}

#german shepard 
GermShep_DB = {
    "Breed" : "German Shepard",
    "Life Span" : "9-13 years",
    "Temperament" : ["Stubborn, Confident, Courageous, Protective"],
    "Weight" : "49-71 lbs",
    "Height" : "22-26 in",
}

def users_pick(prompt):
    msg = input()
    return msg

#prints according to input 
rsp = users_pick("enter breed here:")
if rsp == "golden retriever": 
    print(" ") 
    print("Golden Retriever Info:")
    print(" ")
    for key, value in GoldR_DB.items():
        print(key, ":", value)
elif rsp == "labrador":
    print(" ")
    print("Labrador Info:")
    print(" ")
    for key, value in GoldR_DB.items():
        print(key, ":", value)
elif rsp == "husky":
    print(" ")
    print("Husky Info:")
    print(" ")
    for key, value in Husky_DB.items():
        print(key, ":", value)
elif rsp == "border collie":
    print(" ")
    print("Border Collie Info:")
    print(" ")
    for key, value in BordColl_DB.items():
        print(key, ":", value)
elif rsp == "german shepard":
    print(" ")
    print("German Shepard Info:")
    print(" ")
    for key, value in GermShep_DB.items():
        print(key, ":", value)
else:
    print("error; please type in one of the given options")  

Hello. Which dog breed would you like to know about?
options: golden retriever, labrador, husky, border collie, german shepard
 
Labrador Info:
 
Breed : Golden Retriever
Life span : 10-12 years
Temperament : ['Intelligent, Reliable, Kind, Trustworthy']
Weight : 55-75 lbs
Height : 20-24 in