习题一：
#-*- coding: utf-8-*-
print("Hello World!")
print("Hello Again")
print("I like typing this.")
print("This is fun.")
print('Yay! Printing.')
print("I'd much rather you 'not'.")
print('I "said" do not touch this.')
习题二：
# A comment, this is so you can read your program later.
# Anything after the # is ignored by python.
print ("I could have code like this.") # and the comment after is ignored
# You can also use a comment to "disable" or comment out a piece of code:
# print "This won't run."
# # is call 'octothorpe' or 'pound character'.
print ("This won't run.")
习题三：
print("I will now count my chickens:")
print("Hens",25+30//6)
print("Roosters",100-25*3%4)
print("Now I will count the eggs:")
print(3+2+1-5+4%2-1//4+6)
print("Is it true that 3 + 2 < 5 - 7?")
print(3+2<5-7)
print("What is 3 + 2?",3+2)
print("What is 5 - 7?",5-7)
print("Oh, that's why it's False.")
print("How about some more.")
print("Is it greater?",5> -2)
print("Is it greater or equal?",5>= -2)
print("Is it less or equal?",5<= -2)
习题四：
cars = 100
space_in_a_car = 4
drivers = 30
passengers = 90
cars_not_driven = cars - drivers
cars_driven = drivers
carpool_capacity = cars_driven * space_in_a_car
average_passengers_per_car = passengers / cars_driven
print("There are", cars, "cars available.")
print("There are only", drivers, "drivers available.")
print("There will be", cars_not_driven, "empty cars today.")
print("We can transport", carpool_capacity, "people today.")
print("We have", passengers, "to carpool today.")
print("We need to put about", average_passengers_per_car, "in each car.")
习题五：
name = 'Zed A. Shaw'
age = 35 # not a lie
height = 74 # inches
weight = 180 # lbs
eyes = 'Blue'
teeth = 'White'
hair = 'Brown'
# %s %r的区别
print ("Let's talk about %r." % name)
print ("Let's talk about %s." % name)
print ("He's %d inches tall." % height)
print ("He's %d pounds heavy." % weight)
print ("Actually that's not too heavy.")
print ("He's got %s eyes and %s hair." % (eyes,hair))
print ("His teeth are ususlly %s depending on the coffee. " % teeth)
# this line is tricky, try to get is exactly right
print ("If I add %d, %d, and %d I get %d." % (age, height, weight, age + height + weight))
习题六：
x="There are %d types of people."%10
binary ="binary"
do_not ="don't"
y=" Those who know %s and those who %s."% (binary, do_not)
print(x)
print(y)
print("I said: %r."%x)print("I also said: '%s."%y)
hilarious = False
joke_evaluation ="Isn't that joke so funny?! %r"
print(joke_evaluation % hilarious)
w ="This is the left side of ..."
e ="a string with a right side."
print(w + e)
习题七：
print("Mary had a little lamb.")
print ("Its fleece was white as %s ." % 'snow')
print("And everywhere that Mary went.")
print ("." * 10)
end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"
print (end1 + end2 + end3 + end4 + end5 + end6,)
print (end7 + end8 + end9 + end10 + end11 + end12)
习题八：
formatter ="%r %r %r %r"
print(formatter% (1,2,3,4))
print(formatter% ("one","two","three","four"))
print(formatter% (True, False, False, True))
print(formatter% (formatter, formatter, formatter, formatter))
print(formatter% ("I had this thing.","That you could type up right.","But it didn't sing.","So I said goodnight."))
习题九：
days = "Mon Tue Wed Thu Fri Sat Sun"
months = "\nJan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
print ("Here are the days:", days)
print ("Here are the months: ", months)
print("""
There's something going on here:
With the three double quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5 or 6.
""")
习题十：
tabby_cat="\tI'm tabbed in."
persian_cat="I'm split\non a line."
backslash_cat="I'm \\ a\\ cat."
fat_cat="""
I'll do a list:
\t* Cat food
\t* Fishies
\t* Catnip\n\t* Grass
"""