Google Python Class

[Tset-Noitamotua]

Master the Google Python Class - a series of YouTube videos

• Day 1 Part I
• Day 1 Part II
• Day 1 Part III
• Day 2 Part I
• Day 2 Part II
• Day 2 Part III
• Day 2 Part IV

[Tset-Noitamotua]

finished day 1 part 2 yesterday ... going to finish according exercises today

[Tset-Noitamotua]

@future_me

Day 1 part 2 - Lists

If you need to find the index of an element in a list use enumerate and avoid index()!!!
Take particular note of output in BAD EXAMPLE below. The index is wrong! That's because there are two equal items in the list and thus nums.index(number) --> nums.index(2) makes Python output the index of first occurrence it finds in the list.

nums = [1, 2, 2, 3]

# BAD EXAMPLE! Do NOT do it that way!!!
>>> for number in nums:
...     print('index, number:', nums.index(number), number)

# output:
# ('index, number:', 0, 1)
# ('index, number:', 1, 2)
# ('index, number:', 1, 2)
# ('index, number:', 3, 3)

# GOOD EXAMPLE!
>>> for index, number in enumerate(nums):
...     print('index, number:', index, number)

# output:
# ('index, number:', 0, 1)
# ('index, number:', 1, 2)
# ('index, number:', 2, 2)
# ('index, number:', 3, 3)