''' Questions arising during class 16 review
'''
#
# # Test next classssss :DDDDDDDDDDDDDD
#
# ''' FOR LOOPS '''
# # STRUCTURE OF A FOR LOOP
#     # for lv in sequence:
#           # loop variable loops through each smaller
#           # part of the larger sequence
#           # and assumes a new value one by one
#           # each iteration (repetition of the loop)
#     # Sequences:
#         # Strings -> characters one by one
#         # Lists -> elements one by one
#         # Ranges -> numbers one by one
#             # range(i,j)-> i to j - 1
# s = 'giraffe'
words = ['apple','banana','casaba','bosc','endive']
#
# for c in s:
#     print('c=', c)
#
# for w in words:
#     print('w=',w)
#
# range_start = 0
# range_end = 5
# for i in range( range_start, range_end ): # 0-4
#     print('i=',i)
# # What if we had a range(3,5)? It will run twice.
# # For values 3 and 4
#
# # for i in range(3,5):
# #     print(i)
#
# for w in words:
#     print('w=',w)
#     for c in w:
#         print('   c=', c)
# For each outer loop value, we do two things:
    # we print out w = the word
    # and we print out all of its characters
    # the inner loop has to finish before we
    # move onto the next value of the outer loop
# We started out with 'apple' and we have to finish the
# inner loop (printing out each character of apple)
# before we move onto the next word 'banana'

for i in range(0, 6): # 0-5
    print('i=',i, end=' ' )
    for j in range(0,i+1):
        # print('i=',i, 'j=',j)
        print(j, end=' ')
    # print()

# Nested looping
# digit_box.py (datasets/tables/nested for loops):
n = 5
for r in range(1,n+1):
    for c in range(1, n+1):
        product = r*c % 10
        print(product, end=' ')
    print()
    # end=

'''Indexing (picking things out of strings and lists)'''

s = 'data acquisition'
#    0123456789012345 # the repeated 1-5 is 11,12,13,14,15
ns = len(s) # 16
print('ns=', ns )
print('s[0]=', s[0])  # first character (0)
print('s[ns-1]=', s[ns-1]) # last character (15)

'''Subscripting: Going into a sequence and getting the
# character/element at that number position for a string/list
'''

# s[ index ] # get character in a string - index is a number
# words[ index ] # get element in list - index is a number
print( words )
nw = len( words ) # 5
print('nw=', nw )
print('words[0]=', words[0])  # first character (0)
print('words[nw-1]=', words[nw-1]) # last character (4)

print( words[1] ) # 'banana'
print( 'words[1][1]=', words[1][1] )
# character at index 1 in word at index 1 in words
# words = ['apple','banana',...]
                #   012345
        #     0       1
''' SLICING '''
# Getting multiple characters in a string using number positions
# Getting multiple elements in a list using number positions
s = 'sunny with a chance of bananas'
#    012345678901234567890123456789 # repeated ones are 11,12,...
ns = len(s) # 30
print( ns )
middle = ns//2 # INDEXES CANT BE DECIMALS (15)
middle_characters = s[ middle - 4 : middle + 4 ]
# 15-4: 15+4 = 11:19 -> characters at indexes 11 to 18
print('middle characters =', middle_characters ) # 'a chance'
i = s.find('b') # GET ME INDEX WHERE THIS SUBSTRING IS
print( i ) # .find() returns - 1 if not in your string

j = words.index('endive')
print( words )
print(j)
# k = words.index('end') # That's not in our list!
# print(k) # .index() blows up if it's not in your list

# DONT ask about get_dataset or everyone in this class
# will hate you for the rest of the semester

# get_contents( link ) -> returns text on webpage as
# a huge string

# url.py (data acquisition)
    # url.get_contents( link ) -> returns a big string
    # do manipulations of the string from there
# Accumulation
    # I'll send out a review for this..
# Seeds (random module)
    # reply = input('enter seed')
    # random.seed( reply ) helps you set the seed
    # for random output
    # if you put in a certain seed and have the same
    # seed that we put in you will get the same random
    # output