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

"""