Lists python (JNNC Technologies)

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Lists are very similar to arrays. They can contain any type of variable, and they can contain as many variables as you wish. Lists can also be iterated over in a very simple manner. Here is an example of how to build a list.

script.py

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mylist = []

mylist.append(1)

mylist.append(2)

mylist.append(3)

print(mylist[0]) # prints 1

print(mylist[1]) # prints 2

print(mylist[2]) # prints 3

# prints out 1,2,3

for x in mylist:

print(x)

IPython Shell

In [1]: 

Accessing an index which does not exist generates an exception (an error).

script.py

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mylist = [1,2,3]

print(mylist[10])

IPython Shell

In [1]: 

Exercise

In this exercise, you will need to add numbers and strings to the correct lists using the "append" list method. You must add the numbers 1,2, and 3 to the "numbers" list, and the words 'hello' and 'world' to the strings variable.

You will also have to fill in the variable second_name with the second name in the names list, using the brackets operator []. Note that the index is zero-based, so if you want to access the second item in the list, its index will be 1.

script.py

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numbers = []

strings = []

names = ["John", "Eric", "Jessica"]

# write your code here

second_name = None

# this code should write out the filled arrays and the 

second name in the names list (Eric).

print(numbers)

print(strings)

print("The second name on the names list is %s" % 

second_name)