cars = 100 
space_in_a_car = 4.0 
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." 

root@he-desktop:~/mystuff# python ex4.py 

There are 100 cars available.
There are only 30 drivers available.
There will be 70 empty cars today.
We can transport 120.0 people today.
We have 90 to carpool today.
We need to put about 3 in each car.
root@he-desktop:~/mystuff# 

# -- coding: utf-8 -- 
my_name = 'Zed A. Shaw' 
my_age = 35 # 没撒谎哦 
my_height = 74 # 英寸 
my_weight = 180 # 磅 
my_eyes = 'Blue' 
my_teeth = 'White' 
my_hair = 'Brown' 

print "let's talk about %s." % my_name 
print "He's %d inches tall." % my_height 
print "He's %d pounds heavy." % my_weight 
print "Actually that's not too heavy." 
print "He's got %s eyes and %s hair." % (my_eyes, my_hair) 
print "His teeth are usually %s depending on the coffee." % my_teeth 

# 下面这行比较复杂，尝试写对它。 
print "If I add %d, %d, and %d I get %d." % ( 
  my_age, my_height, my_weight, my_age + my_height + my_weight) 

root@he-desktop:~/mystuff# python ex5.py

let's talk about Zed A. Shaw.
He's 74 inches tall.
He's 180 pounds heavy.
Actually that's not too heavy.
He's got Blue eyes and Brown hair.
His teeth are usually White depending on the coffee.
If I add 35, 74, and 180 I get 289.
root@he-desktop:~/mystuff#