# Data Structures in Python
'''
List [el1, el2, ...] indexed, len(4), range[0-3], dups, add/change
Set {item1, item2, ...} !indexed !sorted !dups 
Tuple (param1, param2, item1, ...) immutable, dups
Dictionary "Map" {key1: value, key2: value,...}  kayName!dup 
'''

# Lists page 25 []
firstNames = ["Bob","Joe","Mary"]
# type function shows what the variable type is
print( type(firstNames) )

newContact = input("Enter contact first name: ") 
firstNames.append(newContact) 

# firstNames[0] = 'Robert'

# for x in ys
# x local variable in scope / sub operation
# ys where is my data coming from?
position = 0
for firstName in firstNames: # len(3)
    print("ID: " + str(position) + " Contact first name: " + firstName + ".")
    position += 1

updateContactID = int(input("What ID do you want to update?: "))

# listName[positionalIndexID]
firstNames[updateContactID] = input("Contact updated name?: ")

position = 0
for firstName in firstNames: # len(3)
    print("ID: " + str(position) + " Contact first name: " + firstName + ".")
    position += 1

# Dictionary Page 28-29
# Ask the user for the inputs()
FIRSTNAME = input("Enter contact first name: ")
LASTNAME = input("Enter contact last name: ")

contact = {
    'fname': FIRSTNAME,
    'lname': LASTNAME,
    'age': 21,
    'instructor': True
} # contact

fullname = contact['fname'] + ' ' + contact['lname']
print(fullname)  # Philip Matusiak