""" Purpose: introduce lists and looping
"""
# looping is a very powerful skill that will expand our problem solving skills
# it's also a little confusing, so follow along and ask questions
# it also will never go away

# two types of loops: for loops and while loops
# loop = repeat = iterate

# Get string of choice
reply = input( "Enter text: " )

# Convert text into a list of words
# a list is a new thing that we're seeing
#w1,w2,w3 = reply.split() # if we know they're entering exactly 3 words, this will work... but what if we don't
words = reply.split() # this will hand back a list of the words that were entered, split on whitespace

# lists are shown in brackets [] with items separated by commas when we print it
# lists are indexed the same way as strings
# lists can hold strings, or numbers, or both, or other lists

# Display list of words
print()
print( "words: ", words )
print()

# Print words one by one
# for each word in the list words, print that word
# let's translate that into code now
# for is a keyword, don't name a variable for, it indicates looping ( seen in bold face )
# print is not a keyword, but still don't name your variables that because then you can't print()
# for ___ in ____ : is how every python for loop begins
# for loop_variable in sequence ( what we want to loop through ) :
# loop variables are a special kind of variable, they change with each iteration through the loop
# looks through the list words and runs once for each word in words
# every time you go through the loop, the loop variable will have a different value from the list
# we have indentation now, for loops are multi-line statements, indicated by indentation
# when you're done with the loop, backspace back to column 1
# current_word is a special loop variable, and will change value each time automatically, we don't have to
# assign the loop variable the values
# the computer will end the for loop when there's no more indentation
# the computer knows to stop looping when it has gone through all of the list words
# EVERY for loop will look like for ____ in _____ :
# we can have for loops in for loops, that's called nesting
for current_word in words :
    print( "current_word:", current_word ) # this will change every time we run through the loop
   # print( "let's continue on looping" )
    current_word_length = len( current_word )
    print( "current_word_length:", current_word_length )
    print()
    # everything indented under the for loop declaration is the body of the for loop. there must be at least
    # one action in the for loop or python will get mad at us :(

# for loops come in three flavors: looping through a list (super common and handy!), looping through a string,
# looping through a range of numbers

print( "All done!" ) # no longer indented - indicating we are done with the for loop, this will run once

# we called our loop variable current_word to emphasize that current_word is updating and changing with each
# iteration of the for loop
# we can loop through more than just lists, such as strings, tuples, and more!
# we do a lot of list processing in this class
# if we want to repeat an action n times, we'll look at the range() function, where we can specify how many
# times we want our for loop to run