【Python爬虫】-笨办法学Python练习01-10

练习一：

# -- coding:utf-8 --
# 练习一
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.',"\n")

练习二：

# -- coding:utf-8 --
# 练习二
# 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.")

练习三：

# -- coding:utf-8 --
# 练习三
#打印
print("I will now count my chickens:")
#计算 Hens
print("Hens", 25 + 30 / 6)
#计算Roosters
print("Roosters", 100 - 25 * 3 % 4)
#打印
print("Now I will count the eggs:")
#计算eggs的数量
print(3 + 2 + 1 - 5 + 4 % 2 -1 // 4 + 6)
#提问题
print("Is it true that 3 + 2 < 5 - 7?")
#判断结果
print(3 + 2 < 5 - 7)
#计算3+2结果
print("What is 3 + 2?", 3 + 2)
#计算5 － 7结果
print("What is 5 - 7?", 5 - 7)
#回答上面的问题
print("Oh, that's why it's False.")
#打印
print("How about some more.")
#一些问题判断
print("Is it greater?", 5 > -2)
print("Is it greater or equal?", 5 >= -2)
print("Is it less or equal?", 5 <= -2)

练习四：

# -- coding:utf-8 --
# 练习四
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.")

练习五：

# -- coding:utf-8 --
# 练习五
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))

练习六：

# -- coding:utf-8 --
# 练习六
#赋值给x,10的格式化为数字
x = "There are %d types of people." % 10
#赋值给binary
binary = "binary"
#赋值给do_not
do_not = "don't"

y = "Those who know %s and those who %s." % (binary, do_not)
#打印x
print (x)
#打印y
print (y)

print ("I said: %r." % x)
print ("I also said: '%s'." % y)
#赋值布尔值给hilarious
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)

练习七：

# --coding:utf-8--
# 练习七
print("Mary had a little lamb.")
print ("Its fleece was white as %s ." % 'snow')
print("And everywhere that Mary went.")
print ("." * 10) # what'd that do?

end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"

# watch that comma at the end. try removing it to see what happens
print (end1 + end2 + end3 + end4 + end5 + end6,)
print (end7 + end8 + end9 + end10 + end11 + end12)

练习八：

# --coding:utf-8--
# 练习八
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."
))

练习九：

# --coding:utf-8--
# 练习九
# Here's some new strange stuff,remember type is exactly.

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.
""")

练习十：

#--coding:utf-8--
# 练习十
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
'''

print (tabby_cat)
print (persian_cat)
print (backslash_cat)
print (fat_cat)