Iteration.py

# -*- coding: utf-8 -*-
"""
Created on Mon Mar 27 17:44:35 2017

@author: Shabaka
"""


# ## ITERATING ITERABLES ### #

# Create a list of strings: flash
flash = ['jay garrick', 'barry allen', 'wally west', 'bart allen']

# Print each list item in flash using a for loop
for person in flash:
    print(person)


# Create an iterator for flash: superspeed
    superspeed = iter(flash)

# Print each item from the iterator
print(next(superspeed))
print(next(superspeed))
print(next(superspeed))
print(next(superspeed))

# ########## Iteration 2 ######## #

# Create an iterator for range(3): small_value
small_value = iter(range(3))

# Print the values in small_value
print(next(small_value))
print(next(small_value))
print(next(small_value))

# Loop over range(3) and print the values
for num in range(3):
    print(num)


# Create an iterator for range(10 ** 100): googol
googol = iter(range(10**100))

# Print the first 5 values from googol
print(next(googol))
print(next(googol))
print(next(googol))
print(next(googol))
print(next(googol))


# ######## ## # Iterator as a function argument ### #
# Create a range object: values
values = range(10, 21)

# Print the range object
print(values)

# Create a list of integers: values_list
values_list = list(values)

# Print values_list
print(values_list)

# Get the sum of values: values_sum
values_sum = sum(values)

# Print values_sum
print(values_sum)

# ############# Enumerate ############ #
# Create a list of strings: mutants
mutants = ['charles xavier',
            'bobby drake',
            'kurt wagner',
            'max eisenhardt',
            'kitty pride']

# Create a list of tuples: mutant_list
mutant_list = list(enumerate(mutants))

# Print the list of tuples
print(mutant_list)

# Unpack and print the tuple pairs
for index1, value1 in enumerate(mutants):
    print(index1, value1)

# Change the start index
for index2, value2 in enumerate(mutants, start=1):
    print(index2, value2)

# #####    Using zip ################# #

# Create a list of tuples: mutant_data
mutant_data = list(zip(mutants, aliases, powers))

# Print the list of tuples
print(mutant_data)

# Create a zip object using the three lists: mutant_zip
mutant_zip = zip(mutants, aliases, powers)

# Print the zip object
print(mutant_zip)

# Unpack the zip object and print the tuple values
for value1, value2, value3 in mutant_zip:
    print(value1, value2, value3)


# ########### Unzip with * and zip (*iterable) ############# #

# Create a zip object from mutants and powers: z1
z1 = zip(mutants, powers)

# Print the tuples in z1 by unpacking with *
print(*z1)

# Re-create a zip object from mutants and powers: z1
z1 = zip(mutants, powers)

# 'Unzip' the tuples in z1 by unpacking with * and zip(): result1, result2
result1, result2 = zip(*z1)

# Check if unpacked tuples are equivalent to original tuples
print(result1 == mutants)
print(result2 == powers)