How do you print certain thing off of a list?

So if you just looked at continents = ['Asia', 'South America', 'North America', 'Africa', 'Europe', 'Antarctica', 'Australia'], continents[0] is Asia, continents[1] is South America, continents[2] is North America, and so on. Now to handle every item in the continents dictionary, you say

for continent in continents:
    print(continent)

This would print out every continent individually, one at a time, going through the dictionary 'continents'. Now we want to print out every continent that begins with the letter 'A', so you will treat each individual word as its own dictionary. For instance, if we said,

for continent in continents:
    for letters in continent:
      print(letters)

That would print out, on a bunch of seperate lines, each individual letter of every continent. A, S, I, A, S, O, U, T, H, A, M, E, R, I, C, A, and so on. For continent in continents cycles through the words, so when it gets to Asia, 'for letters in continent:' cycles through the letters of Asia, treating the word as its own dictionary of letters = ['A', 's', 'i', a']. Then on the next time through it would go to South America, then 'letters in continent:' would represent, ['S', 'o', 'u', 't', 'h', 'A', 'm', 'e', 'r', 'i', 'c', 'a'], and it would continue do the list til it reached the end. It is treating each word as its own dictionary. So if you only wanted to print out the ones that begin with A

continents = ['Asia', 'South America', 'North America', 'Africa', 'Europe', 'Antarctica', 'Australia']
for continent in continents:
  if continent[0] == 'A':
    print(continent)

This goes to the first position of every word. "continent in continents", where continent is each individual string, 'Asia', 'South America', and so on. if continent[0], aka, the first letter of dictionary, 'A', 's', 'i', 'a', is == A, then print the whole string that is represented by the variable 'continent' on that specific cycle through the dictionary.

I'm not sure if I am helping you or making you more confused, but hope that gives a little more explanation.