# first lecture, Data Analytics with Python
# Python basics + NumPy
print("Spyder says hello!")

salary = 3000

raised = 1.20

salary = salary * raised

person = "John Doe"

snowing = True

number = "123"

number_int = int(number)

print(salary)
print(person)
print(snowing)

apples = 75
people = 8

# / for traditional division, // for leaving out the decimals
apples_for_people = apples // people

# remainder / modulus is the same as C, %
leftovers = apples % people

value = 100

value += 50

print(value)

# easiest way to make string in Python, is to use f-strings
first_name = "John"
surname = "Doe"

greetings = f"Hello, my name is {first_name} {surname}"
print(greetings)

year = 2021

text = f"This year is {year}. Previous year was {year - 1}."
print(text)

# A NEW FILE

print("If-statements")

number = input("Give a number: ")

number = int(number)

total = number + 62

print(number)

if number > 0:
    print("Number is greater than zero.")
elif number < 0:
    print("Number is less than zero.")
else:
    print("Number is zero.")
    print("This is an else statement.")


print("We are now outside the if/elif/else structure")

# in C-language, it's something like this
#if(number > 0)
#{
#    print("Number is greater than zero.");
#}

# NEW FILE

grades = [1, 5, 3, 4, 3, 2]

# second grade, note: indexing starts from 0
print(grades[1])

# first grade
print(grades[0])

# last grade in this list
print(grades[5])

# this one doesn't exist
# print(grades[6])

# you can change list values by using the index
grades[0] = 3

weekdays = ("Monday", "Tuesday", "Wednesday",
            "Thursday", "Friday", "Saturday", "Sunday")

# tuple can't be altered without creating the tuple again from scratch
# weekdays[0] = "Funday"

# a list sum and print example
shopcart = [99, 49, 299, 149]

total_price = sum(shopcart)

print(f"Total price of your purchase: {total_price} €")

# you can also create lists from user input strings
# original string
#numbers = "5 12 33 45 6"

numbers = input("Give some numbers, separate by space: ")

# split to string list
number_list = numbers.split()

# convert string list to int list
number_list = list(map(int, number_list))


# NEW FILE

day_1 = [-22, -20, -17, -15, -10]
day_2 = [-10, -8, -12, -7, -6]
day_3 = [-32, -28, -29, -27, -30]

temperatures = [day_1, day_2, day_3]

# simple loops
numbers = [55, 44, 22, 33, 11, 66]

for x in range(11):
    print(x)


for x in range(1, 11):
    print(x)


for year in range(2000, 2022):
    print(year)


for n in numbers:
    print(n)

# in C-language, it's something like this
#for(int a = 0; a <= 10; a++)
#{
#    print(a)
#}

# you can use if -statements in loops too
for x in range(1, 11):
    if x % 2 == 0:
        print(x)


# if you have a list of lists, you usually need to do this (two loops):
for day in temperatures:
    for t in day:
        print(t)