笨办法学Python3 习题24和习题25

基于Python3.6

习题24

print("Let's practice everything.")
print('You\'d need to know \' bout escapes withe \\ that do \n newlines and \t tabs.')

poem = '''
\t The lovely world
with logic so firmly planted
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explanation
\n\t\twhere there is none.. 
'''

print("-----------------")
print(poem)
print("-----------------")


five = 10 - 2 + 3 - 6
print("This should be five: %s" % five)

def secret_formula(started):
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates


start_point = 10000
beans, jars, cractes = secret_formula(start_point)

print("With a starting point of: %d" % start_point)
print("We'd have %d beans, %d jars, and %d crates." % (beans, jars, cractes))


start_point = start_point / 10

print("We can also do that this way:")
print("We'd have %d beans, %d jars, and %d crates." % secret_formula(start_point))

习题25

def break_words(stuff):
    """This function will break up words for us."""
    words = stuff.split(' ')
    return words

def sort_words(words):
    """Sorts the words."""
    return sorted(words)

def print_first_word(words):
    """Prints the first word after popping it off."""
    word = words.pop(0)
    print(word)

def print_last_word(words):
    """Prints the last word after popping it off."""
    word = words.pop(-1)
    print(word)

def sort_sentence(sentence):
    """Takes in a full sentence and returns the sorted words."""
    words = break_words(sentence)
    return  sort_words(words)

def print_first_and_last(sentence):
    """Prints the first and last words of the sentences."""
    words = break_words(sentence)
    print_first_word(words)
    print_last_word(words)

def print_first_and_last_sorted(sentence):
    """Sorts the words then prints the first and last one."""
    words = sort_setence(sentence)
    print_first_word(words)
    print_last_word(words)