笨办法学习Python3练习代码1-10

ex1.py

print("hello world!",end = " ")#不换行
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.')
print("")

ex2.py

# 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 code:
#print("This won't run.")
print("This will run.")
print("hi # there.")

#  (#)的英文是octothorpe或者 pound character

ex3.py

#数字和数学运算
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 eequal ?", 5 >= -2)
print("Is it less or equal ?", 5 <= -2)

ex4.py

#变量和命名

#汽车数量
cars = 100

#每辆汽车的运载人数
space_in_a_car = 4

#司机人数
drivers = 30

#乘客人数
passengers = 90

#空车数量
cars_not_driven = cars - drivers

#占用的汽车数量
cars_driven = drivers

#最大可运输的人数
carpool_capacity = cars_driven * space_in_a_car  #capacity=容积，carpool=拼车

#平均每台汽车上的人数
average_passengers_per_car = passengers / cars_driven

print("there are ",cars,"cars available.")
print("There are only",drivers,"drivers availlable.")
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.")

ex5.py

name = 'Zed A.Shaw'
age = 35     #not a lie
height = 74  #inches
weight = 180 #lbs
eyes = 'Blue'
teeth = "White"
hair = "Brown"

print(f"Let's talk about {name}.")    #f代表格式化的意思format
print(f"He's {height} inches tall.")
print(f"He's {weight} pounds heavy.")
print("Actually that's not too heavy.")
print(f"He's got {eyes} eyes and {hair} hair.")
print(f"His teeth are usually {teeth} depending on the coffee.")

#this line is tricky, try to get it exactly right
total = age + height + weight
print(f"If I add {age}, {height}, and {weight}. I get {total}.") 

ex6.py

tpyes_of_people = 10

x = f"There are {tpyes_of_people} types of people."
binary = "binary"
do_not = "don't"
y = f"Those who know {binary} and those who {do_not}."

print(x)
print(y)
print(f"I said: {x} .")
#还是格式化输出字符串，在输出的字符串外面带上''
print(f"I also said: '{y}'.")

hilarious = "False"
joke_evaluation = "Isn't that joke so funny ?!{}"

#输出Isn't that joke so funny ?!False
#.format()括号里面的内容都是格式化输出
print(joke_evaluation.format(hilarious))

w = "This is the left side of ..."
e = "a string with a right side."
print(w + e)

ex7.py

print("Mary had a little lamb.")

print("Its fleece was white as {}.".format('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, end = " ")
print(end7 + end8 + end9 +end10 + end11 + end12)

ex8.py

formatter = "{} {} {} {}"

print(formatter.format(1,2,3,4))
print(formatter.format('one','two','three','four'))
print(formatter.format(True,False,False,True))
print(formatter.format(formatter,formatter,formatter,formatter))

print(formatter.format(
      "Try your",
      "Own text here",
      "Maybe a poem",
      "Or a song about fear"))
      
#这个习题使用了format函数，让它返回formatter变量到其他字符串中
#当看到formatter.format（....）,相当于
#1.取第一行定义的formatter字符串
#2.调用它的format函数
#3.给format传递四个参数，这些参数和formatter中的{}匹配
#4.在formatter上调用format的结果是一个新字符串，其中的{}被四个变量所替换

ex9.py

# Here's some new strange stuf(材料，原料),remember type it exactly.
days = "mon tue wed thu fri sat sun"
months = " jan\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 tpye as much as we like.
even 4 lines if we want,or 5, or 6.''')

 

ex10.py

#\\转义字符\
#\t转义字符tab键缩进，水平制表符，一个制表符8个位置
#\'输出'
#\"输出“



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)