Finding differences in values between days.

example1.py

days = [10, 11, 12, 13 , 14]
values = [1, 2, 3, 5, 6]
data = list(zip(days, values))
print(data)

biggest_change = 0
day_of_biggest_change = None

for index, data_point in enumerate(data[1:]):
    print('data_point: ', data_point)
    data_point_previous = data[index]
    change = data_point[1] - data_point_previous[1]
    if change > biggest_change:
        biggest_change = change
        day_of_biggest_change = data_point[0]

print(biggest_change)
print(day_of_biggest_change)

example2.py

"""
Using range (like a traditional for-loop in other languages)
"""
days = [10, 11, 12, 13 , 14]
values = [1, 2, 3, 5, 6]
data = list(zip(days, values))
print(data)

biggest_change = 0
day_of_biggest_change = None

for i in range(len(data) - 1):
    previous = data[i][1]
    current = data[i+1][1]
    change = current - previous
    if change > biggest_change:
        biggest_change = change
        day_of_biggest_change = data[i+1][0]

print(biggest_change)
print(day_of_biggest_change)

example3.py

"""
using named tuples for nicer usage of data. It avoids using [0] and [1] to access values, and instead uses names.
"""
from collections import namedtuple

Point = namedtuple('Point', ['day', 'value'])

days = [10, 11, 12, 13 , 14]
values = [1, 2, 3, 5, 6]
raw_data = list(zip(days, values))
data = [Point(day=day, value=value) for day, value in raw_data]

biggest_change = 0
day_of_biggest_change = None

for i in range(len(data) - 1):
    previous = data[i].value
    current = data[i+1].value
    change = current - previous
    if change > biggest_change:
        biggest_change = change
        day_of_biggest_change = data[i+1].day

print(biggest_change)
print(day_of_biggest_change)