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KuzeKuzeKuzeKuze
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学习过程中写的代码
参考书目为本办法学python
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‎ex1.py

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print("Hello world!")
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print("Hello Again")
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print("I like typing this.")
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print("This is fun.")
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print("Yay! Printing.")
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print("I'd much rather you 'not'.")
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print('I "said" do not touch this.')

‎ex13.py

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from sys import argv
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script, first, second, third = argv
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print("The script is called:", script)
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print("Your first variable is:", first)
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print("Your second variable is:", second)
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print("Your third variable is:", third)

‎ex14.py

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from sys import argv
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script, user_name = argv
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prompt = "-->>"
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print(f"Hi {user_name}, i'm the {script} script.")
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print(f"I'd like to ask you a few questions.")
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print(f"Do you like me {user_name}")
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likes = input(prompt)
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print(f"Where do you live {user_name}?")
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lives = input(prompt)
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print("What kind of computer do you have?")
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computer = input(prompt)
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print(f"""
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Alright, so you said {likes} about liking me.
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You live in {lives}. Not sure where that is.
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And you have a {computer} computer. Nice.
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""")

‎ex15.py

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from sys import argv
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script, filename = argv
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txt = open( filename )
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print(f"Here's your file {filename}:")
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print(txt.read())
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print("Type the filename again:")
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file_again = input("> ")
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txt_again = open(file_again)
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print(txt_again.read())

‎ex15_sample.txt

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This is stuff I typed into a file.
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It is really cool stuff.
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Lots and Lots of fun to have in here.

‎ex16.py

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from sys import argv
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script, filename = argv
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print(f"We're going to erase {filename}.")
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print(f"If you don't want that, hit CTRL-C (^C).")
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print("If you do want that,hit RETURN.")
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input("?")
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print("Opening the file...")
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target = open(filename,"w")
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print("Truncating the file. Goodbye!")
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target.truncate()
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print("Now I'm going to ask you for three lines.")
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line1 = input("line1: ")
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line2 = input("line2: ")
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line3 = input("line3: ")
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print("I am going to write these to the file.")
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target.write(line1)
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target.write("\n")
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target.write(line2)
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target.write("\n")
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target.write(line3)
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target.write("\n")
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print("And finally, we close it.")
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target.close()

‎ex17.py

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from sys import argv
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from os.path import exists
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script, from_file, to_file = argv
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print(f"Coping from {from_file} to {to_file}")
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in_file = open( from_file )
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indata = in_file.read()
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print(f"The input file is {len(indata)} bytes long.")
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print(f"Does the output file exist? {exists(to_file)}")
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print("Ready, hit RETURN to continue,CTRL-C to abort.")
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input()
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out_file = open(to_file, 'w')
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out_file.write(indata)
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print("Alright, all done.")
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out_file.close()
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in_file.close()

‎ex18.py

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#这里定义几个函数和解包
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def print_two( *args ):
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arg1, arg2 = args #解包操作
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print( f"arg1: {arg1}, arg2: {arg2}")
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def print_two_again(arg1, arg2):
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print(f"arg1: {arg1}, arg2: {arg2}")
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def print_one(arg1):
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print(f"arg1: {arg1}")
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def print_none():
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print("I got nothin'.")
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print_two("Kuze","Du")
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print_two_again("Kuze","Du")
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print_one("First")
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print_none()

‎ex2.py

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#这是一个注释
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print("I could code like this.")#这也是一个注释
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#我可以用注释来使得语句无效
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#print("This won't run.")
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print("This will run.")

‎ex20.py

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from sys import argv
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script, input_file = argv
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def print_all(f):
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print( f.read())
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def rewind(f):
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f.seek(0)
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def print_a_line(line_count, f):
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print( line_count, f.readline())
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current_file = open( input_file )
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print("让我们先来全部打印一下。")
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print_all(current_file)
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print("像磁带那样回溯到一个位置。")
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rewind(current_file)
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print("打印3行")
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current_line = 1
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print_a_line(current_line,current_file)
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current_line += 1
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print_a_line(current_line,current_file)
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current_line += 1
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print_a_line(current_line,current_file)
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‎ex3.py

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print("I will now count my chickens:")
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print("Hens",25+30/6)
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print("Roosters",100 - 25 * 3 % 4)
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print("Now I will count the aggs:")
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print(3 + 2 + 1 - 5 + 4 % 2 -1 / 4 + 6)
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print("Is it true that 3 + 2 < 5 - 7?")
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print( 3 + 2 < 5 - 7)
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print("What is 3 + 2?",3 + 2)
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print("What is 5 - 7?",5 - 7)
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print("Oh, that's why it's False.")
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print("Is is greater?",5 > -2)
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print("Is is greater or equal?", 5 >= -2)
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print("Is it less or equal?", 5 <= -2)

‎ex3_study_drills_4.py

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print("现在我要用浮点数来数鸡有多少只。")
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print("母鸡有：",25 + 30 / 6 )
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print("公鸡有：",100 - 25 * 3 % 4 + 0.0)
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print("现在我要数数蛋有多少。")
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print(3 + 2 + 1 - 5 + 4 % 2 -1 / 4 + 6)
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print("3 + 2 < 5 - 7 对吗？")
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print(3 + 2 < 5 - 7)
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print("3 + 2 等于多少？",3 + 2)
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print("5 - 7 等于多少？",5 - 7)
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print("怪不得结果是False。")
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print("大于成立？",5 > -2)
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print("大于等于成立吗？",5 >= -2)
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print("小于等于成立吗？",5 <= -2)
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‎ex4.py

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cars = 100#一共100辆车
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space_in_a_car = 4#车上的空位
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drivers = 30#司机的数量
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passengers = 90#乘客的数量
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cars_not_driven = cars - drivers #空车的数量
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cars_driven = drivers#有司机的车的数量
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carpool_capacity = cars_driven * space_in_a_car#车的总容量
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average_passengers_per_car = passengers / cars_driven#平均每辆车的乘客数，似乎/这种除法的结果怎么都是浮点数
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print("There are", cars, "cars available.")
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print("There are only", drivers, "drivers available.")
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print("There will be", cars_not_driven, "empty cars today.")
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print("We can transport",carpool_capacity,"people today.")
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print("We have",passengers,"to carpool today.")
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print("We need to put about", average_passengers_per_car,"in each car.")

‎ex4_study_drills.py

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print(round(1.7333))#没有第二个参数是返回整数
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#若第二个ndigits参数是0是返回浮点数！！！！

‎ex5.py

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name = 'Kuze'
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age = 20
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height = 183*0.3937
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weight = 61*2.2
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eyes = 'Black'
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teeth = 'White'
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hair = 'Black'
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print(f"Let's talk about {name}.")
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print(f"He's {height} cm.")
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print(f"He's {weight} pounds heavy.")
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print("Actually that's not too heavy.")
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print(f"He's got {eyes} eyes and {hair} hair")
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print(f"His teeth are usually {teeth} depending on the")
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total = age + height + weight
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print(f"If I add {age}, {height}, and {weight} I get {total}")

‎ex6.py

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types_of_people = 10
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x = f"There are {types_of_people} types_of_people." #把types_of_people替换进字符串
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binary = "binary"
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do_not = "don't"
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y = f"Those who know {binary} and those who {do_not}."#把binary和do_not变量替换进去
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print(x)
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print(y)
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print(f"I said: {x}") #把x变量替换进字符串然后输出
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print(f"I also said: '{y}'") #把y变量替换进字符串然后输出
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hilarious = False
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joke_evaluation = "Isn't that joke so funny?!{}"
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print(joke_evaluation.format(hilarious)) #用format函数把hilarious替换到字符串的{}中
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w = "This is the left side of..."
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e = "a string with a right side."
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print( w + e )

‎ex7.py

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print("Mary had a little lamb.")
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print("Its fleece was white as {}.".format('snow'))
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print("And everywhere that Mary went.")
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print("." * 10) # what'd that do?
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end1 = "C"
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end2 = "h"
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end3 = "e"
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end4 = "e"
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end5 = "s"
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end6 = "e"
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end7 = "B"
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end8 = "u"
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end9 = "r"
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end10 = "g"
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end11 = "e"
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end12 = "r"
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print(end1 + end2 + end3 + end4 + end5 + end6, end=" ")
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print(end7 + end8 + end9 + end10 + end11 + end12)

‎ex8.py

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formatter = "{} {} {} {}"
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print(formatter.format(1, 2, 3, 4))
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print(formatter.format("one", "two", "three", "four"))
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print(formatter.format(True, False, False, True))
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print(formatter.format(formatter, formatter, formatter, formatter))
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print(formatter.format(
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"Try your",
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"Own text here",
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"Maybe a poem",
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"Or a song about fear"
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))

‎ex9.py

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days = "Mon Tue Wed Thu Fri Sat Sun"
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months = "Jan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
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print("Here are the days: ",days)
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print("Here are the months: ",months)
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print("""
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There's somthing going on here.
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With the three double-quotes.
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We'll be able to type as much as we like.
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Even 4 lines if we want, or 5,or 6.""")

‎new_file.txt

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laozi\nchihuoguo
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ni\tok dj
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devil may cry

‎test.txt

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laozi\nchihuoguo
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ni\tok dj
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devil may cry

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