loops and data type review

drinks = [
    {
        "type": "water",
        "calories": 0,
        "number_consumed": 5
    },
    {
        "type": "orange juice",
        "calories": 220,
        "number_consumed": 3
    },
    {
        "type": "gatorade",
        "calories": 140,
        "number_consumed": 1
    }
]

drinks

[{'type': 'water', 'calories': 0, 'number_consumed': 5},
 {'type': 'orange juice', 'calories': 220, 'number_consumed': 3},
 {'type': 'gatorade', 'calories': 140, 'number_consumed': 1}]

# Exercise 1
# Loop through the list of dictionaries to print out the total number of calories consumed for each beverage type
# Planning:
# calories * number of units consume = total for that beverage type


# One weird trick to solving looping problems == blow off the loop, forgetaboutit
# How do we blow off the loop?
# Make a variable holding only the first item
drink = drinks[0]
drink

{'type': 'water', 'calories': 0, 'number_consumed': 5}

drinktype = drink["type"]
calories = drink["calories"]
number_consumed = drink["number_consumed"]
total_calories = number_consumed * calories
print(f"{total_calories} is the total calories from drinking {number_consumed} units of {drinktype}")

0 is the total calories from drinking 5 units of water

for drink in drinks:
    drinktype = drink["type"]
    calories = drink["calories"]
    number_consumed = drink["number_consumed"]
    total_calories = number_consumed * calories
    print(f"{total_calories} is the total calories from drinking {number_consumed} units of {drinktype}")

0 is the total calories from drinking 5 units of water
660 is the total calories from drinking 3 units of orange juice
140 is the total calories from drinking 1 units of gatorade

# list of lists
x = [
    [1, 2, 3],
    [2, 3, 4]
]

first_row = x[0]
first_row

[1, 2, 3]

# Second element of the first row?
first_row[1]

# Second element of the first row?
x[0][1]

beatles = [
    "john",
    "ringo",
    "george",
    "paul"
]
beatles

['john', 'ringo', 'george', 'paul']

# Let's access the last character of the second string on the list
second_on_list = beatles[1]
second_on_list

'ringo'

# Let's access the last character of the second string on the list

second_on_list[-1]

'o'

beatles[1] # gives us the second string on the list
beatles[1][-1] # gives us the last character of the second stirng on the list of beatles

'o'

ds_topics = {
    "fundamentals": {
        "beginning": "data science pipeline",
        "middle": "ds skills in demand",
        "end": "git"
    },
    "sql": {
        "beginning": "what is sql?",
        "middle": "joins and subqueries",
        "end": "case"
    },
    "python": {
        "beginning": "how to run python",
        "middle": "loops and data structures",
        "end": "python assessment"
    }
}
ds_topics

{'fundamentals': {'beginning': 'data science pipeline',
  'middle': 'ds skills in demand',
  'end': 'git'},
 'sql': {'beginning': 'what is sql?',
  'middle': 'joins and subqueries',
  'end': 'case'},
 'python': {'beginning': 'how to run python',
  'middle': 'loops and data structures',
  'end': 'python assessment'}}

ds_topics

{'fundamentals': {'beginning': 'data science pipeline',
  'middle': 'ds skills in demand',
  'end': 'git'},
 'sql': {'beginning': 'what is sql?',
  'middle': 'joins and subqueries',
  'end': 'case'},
 'python': {'beginning': 'how to run python',
  'middle': 'loops and data structures',
  'end': 'python assessment'}}

# Directly access the middle topic of the python module
ds_topics["python"]

{'beginning': 'how to run python',
 'middle': 'loops and data structures',
 'end': 'python assessment'}

python_module = ds_topics["python"]
python_module["middle"]

'loops and data structures'

ds_topics["python"]["middle"]

'loops and data structures'

ds_topics.get("python")

{'beginning': 'how to run python',
 'middle': 'loops and data structures',
 'end': 'python assessment'}

ds_topics.get("python").get("middle")

'loops and data structures'

# Use a loop to output access the middle topic of the python module
# What if the data we're processing is WAY too big to read it all and we need to loop through hundreds/thousands
ds_topics

{'fundamentals': {'beginning': 'data science pipeline',
  'middle': 'ds skills in demand',
  'end': 'git'},
 'sql': {'beginning': 'what is sql?',
  'middle': 'joins and subqueries',
  'end': 'case'},
 'python': {'beginning': 'how to run python',
  'middle': 'loops and data structures',
  'end': 'python assessment'}}

ds_topics.keys()

dict_keys(['fundamentals', 'sql', 'python'])

# notice that .values doesn't contain "fundamentals", "sql", "python" b/c those are the keys
ds_topics.values()

dict_values([{'beginning': 'data science pipeline', 'middle': 'ds skills in demand', 'end': 'git'}, {'beginning': 'what is sql?', 'middle': 'joins and subqueries', 'end': 'case'}, {'beginning': 'how to run python', 'middle': 'loops and data structures', 'end': 'python assessment'}])

# What if we need to loop through a dictionary
for key in ds_topics.keys():
    print(key)

fundamentals
sql
python

# What if we need to loop through a dictionary
for key in ds_topics.keys():
    if key.lower() == "python":
        middle_section = ds_topics[key]["middle"]
        print(f"In the middle of the {key} lessons, we focus on {middle_section}")

In the middle of the python lessons, we focus on loops and data structures

print("Welcome to the Codeup syllabus application where you can look up topics!")

while True:
    topic_choice = input("Please input the topic you want to know more about.")

    if topic_choice.lower() not in ds_topics.keys():
        print("That topic is not in the records")
        continue
    else:
        print(f"Looking up more on: {topic_choice} ...")
        break

while True:
    module_choice = input("Please input 'beginning', 'middle', or 'end' to output which part of that module to look up")
    
    if module_choice not in ds_topics[topic_choice].keys():
        print("That module portion is not in the records")
        continue
    else:
        selection = ds_topics[topic_choice][module_choice]
        break

print(f"In the {module_choice} part of the {topic_choice} curriculum, we cover {selection}")

ryanorsinger/loops_and_data_structures.md