Lists

Lists#

Exercise 1: Explain this error#

my_list = [1, 2, 3, 4]
print(my_list[10])

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
Cell In[3], line 2
      1 my_list = [1, 2, 3, 4]
----> 2 print(my_list[10])

IndexError: list index out of range

Exercise 2: Print the first, the last and second to last item in the list#

Remember that you can use negative indices.

ta = [-0.19,-0.177,-0.308,-0.289,-0.193,-0.057,0.077,0.026,0.029,0.068,0.256, 0.342, 0.591, 0.792]

# your solution here
print(ta[-2])

0.591

Exercise 3: Slice indexing#

Use slice indexing to print

  1. only the odd elements of the list (odd elements are the first, third, fifth etc. elements)

  2. only the even elements of the list (even elements are the second, fourth, sixth etc. elements)

  3. the list elements in reverse order

my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# edit this:
print('even:', my_list[1::2])
print('odd:', my_list[::2])
print('reverse:', my_list[::-1])

even: [2, 4, 6, 8]
odd: [1, 3, 5, 7, 9]
reverse: [9, 8, 7, 6, 5, 4, 3, 2, 1]

Exercise 4: Manipulating lists#

Add the item 10 to the end of the list

Bonus: Add the item 0 to the beginning of the list

my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]

# your solution here
my_list.append(10)
Contents