Python Revision - Section II - Statements

If we iterate over a list of tuples, we can get each element of each tuple through what we called unpacking:

list = [(1,2), (3,4)]
for (t1, t2) in list:
    print (t1, t2)

The same behaviour is valid to iterate over a dictionary.

Usefull Operators:

range

Generator to quickly generate a list of integers.

print(list(range(0,100,10)))

#=> prints [0,10,20,30,...,90]

enumerate

Enumerate is a built-in function which allows us to loop over some list and have an automatic counter.

my_list = ["a", "b", "c"]
for i, element in enumerate(my_list, 1):
    print(i, element)

#=> prints:
# 1 a
# 2 b
# 3 c

zip

A generator used to combine two lists

list_1 = [1,2,3]
list_2 = ["a", "b", "c"]
list(zip(list_1, list_2))

#=> prints [(1,'a'), (2,'b'), (3, 'c')]

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