Lists

POPCORN HACK 1

Code Runner Challenge

POPCORN HACK 1

View IPYNB Source 
# CODE_RUNNER: POPCORN HACK 1

items_needed = ["blankets", "socks", "water", "meals"]

print(items_needed[0])          # prediction: blankets
print(items_needed[3])          # prediction: meals, the last item
print(len(items_needed))        # prediction: 4
print(items_needed[3])          # fixed from items_needed[5], which is out of range
Lines: 1 Characters: 0
Output
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POPCORN HACK 2

Code Runner Challenge

POPCORN HACK 2

View IPYNB Source 
# CODE_RUNNER: POPCORN HACK 2

volunteer_hours = [7, 6, 8, 5, 7, 9]

total_hours = 0
for hours in volunteer_hours:
    total_hours = total_hours + hours

if len(volunteer_hours) == 0:
    print("No data yet")
else:
    average_hours = total_hours / len(volunteer_hours)
    print(total_hours)
    print(average_hours)
Lines: 1 Characters: 0
Output
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POPCORN HACK 3

Code Runner Challenge

POPCORN HACK 3

View IPYNB Source 
# CODE_RUNNER: POPCORN HACK 3

items_requested = ["blankets", "socks", "meals", "socks", "water", "socks", "meals"]

frequency = {}
for item in items_requested:
    if item in frequency:
        frequency[item] += 1
    else:
        frequency[item] = 1

popular = []
for item in frequency:
    if frequency[item] >= 2:
        popular.append(item)

print(frequency)
print(popular)
Lines: 1 Characters: 0
Output
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HOMEWORK HACK

Code Runner Challenge

HOMEWORK HACK

View IPYNB Source 
# CODE_RUNNER: HOMEWORK HACK

donations_by_item = ["blankets", "socks", "blankets", "water", "socks", "blankets",
                     "meals", "socks", "blankets", "water", "blankets", "socks"]

costs = [2, 3, 2, 4, 3, 2, 1, 3, 2, 4, 2, 3]

# LESSON 1 - indexing
print(len(donations_by_item))
print(donations_by_item[-1])

# LESSON 2 - sum and average
total = 0
for cost in costs:
    total = total + cost

if len(costs) == 0:
    print("No cost data")
else:
    average = total / len(costs)
    print("Total:", int(total))
    print("Average:", int(average))

# LESSON 3 - count and filter
frequency = {}
for item in donations_by_item:
    if item in frequency:
        frequency[item] += 1
    else:
        frequency[item] = 1

popular = []
for item in frequency:
    if frequency[item] >= 3:
        popular.append(item)

print(frequency)
print(popular)
Lines: 1 Characters: 0
Output
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