""" Purpose: introduce the dict type
"""

# initialize dictionary and print it out
flora_to_color = { 'spruce': 'green',     'apple': 'red',       'shamrock': 'green',
                   'banana': 'yellow',    'potato': 'brown',    'eggplant': 'purple' }

print( "flora_to_color: ", flora_to_color )

print(); input( "Enter when ready. " ); print()

# determine number of mappings
nbr_mappings = len( flora_to_color )

print( "len( flora_to_color): ", nbr_mappings )

print(); input( "Enter when ready. " ); print()

# access individual dictionary entry
c1 = flora_to_color[ 'potato' ]

print( "flora_to_color[ 'potato' ]: )", c1 )

print(); input( "Enter when ready. " ); print()

# add mapping to dictionary
flora_to_color[ 'lemon' ] = 'yellow'

print( "flora_to_color: ", flora_to_color )

print(); input( "Enter when ready. " ); print()

# reset dictionary mapping
flora_to_color[ 'potato' ] = 'golden'

print( "flora_to_color: ", flora_to_color )

print(); input( "Enter when ready. " ); print()

# get the keys and values of the dictionary
flora_keys = flora_to_color.keys()
color_values = flora_to_color.values()

print( "flora_to_color.keys(): ", flora_keys )
print( "flora_to_color.values(): ", color_values )

print(); input( "Enter when ready. " ); print()

# convert keys and values to lists
flora = list( flora_keys )
colors = list( color_values )

print( "list( flora_to_color.keys() ): ", flora )
print( "list( flora_to_color.values() ): ", colors )

print(); input( "Enter when ready. " ); print()

# loop through the mappings

for key in flora_to_color: 
    value = flora_to_color[ key ]
    print( key, ":", value )