敲敲敲可爱の学习笔记

print("I 'said' do not touch this.")
print('I "said" do not touch this.')

print("Hi # there.")

print(100 - 25 * 3 % 4)
# %表示除余部分

# How much space is there in a car; this is a floating point.
space_in_a_car = 4.0

my_name = '敲敲敲可爱'
my_age = 22 # Not a lie
my_height = 5.5 # feet
my_weight = 55 # kilograms
my_eyes = 'Black'
my_teeth = 'White'
my_hair = 'Black'

print(f"Let's talk about {my_name}.")
print(f"I'm {my_height} feet tall.")
print(f"I'm {my_weight} kilograms heavy.")
print("我觉得我不太胖。哈哈哈。")
print(f"I've got {my_eyes} eyes and {my_hair} hair.")
print(f"My teeth are usually {my_teeth} depending on the nothing.")

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

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

print(joke_evaluation.format(hilarious))

f"some stuff here {avariable}"
f"some other stuff {anothervar}"

print("Its fleece was white as {}.The lamb was {} pounds heavy and born on {}.".format('snow', 123, 5.12))

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)

# 不要忘了ex7的注意，format 后面小括号有几个值，前面就得有几个花括号，要和花括号对应
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(
    "Oh little pattington",
    "Daddy won't be around you anymore.",
    "So please take care of yourself",
    'Remember daddy loves you.'
))

# \n代表换行，有点跟正则表达差不多
months = "\nJan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
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.
三引号，可以进行多行编辑，并且可以同时使用单引号和双引号"''"
""")

tabby_cat = "\tI'm tabbed in."
persian_cat = "I'm split\non a line."
backlash_cat = "I'm \\ a \\ cat."

fat_cat = """
I'll do do a list:
\t* Cat food
\t* Fishies
\t* Catnip\n\t* Grass
"""

print(tabby_cat)
print(persian_cat)
print(backlash_cat)
print(fat_cat)

print("How old are you?", end=' ')
age = input()
print("How tall are you?", end=' ')
height = input()
print("How much do you weight?", end=' ')
weight = input()

print(f"So, you're {age} old, {height} tall and {weight} heavy.")

height = input("How tall are you?")
weight = input("How much do you weight?")

print(f"So, you're {age} old, {height} tall and {weight} heavy.")

# This is how you add features to your script from the Python feature set. And this keeps your programs small, but it also acts as documentation for other programmers who read your code later.
from sys import argv
# read the WYSS for how to run this
script, first, second, third = argv
# This is a debug line.
print(">>>>> argv=", repr(argv))

script = input()
print("The script is called:", script)
first = input()
print("Your first variable is:", first)
second = input()
print("Your second variable is:", second)
third = input()
print("Your third variable is:", third)

from sys import argv
script, user_name = argv
prompt = '>>>> '

print(f"Hi {user_name}, I'm the {script} script.")
print("I'd like to ask you a few questions.")
print(f"Do you like me {user_name}?")
likes = input(prompt)

print(f"Where do you live {user_name}?")
lives = input(prompt)

print("What kind of computer do you have?")
computer = input(prompt)

print(f"""
Alright, so you said {likes} about likeing me.
You live in {lives}. Not sure where that is.
And you have a {computer} computer. Nice.
""")

# 这次的练习很容易迷糊，需要多次复习！尝试自己再写一遍！
from sys import argv

script, filename = argv

txt = open(filename)

print(f"Here's your file {filename}:")
print(txt.read())

print("Type the filename again:")
# 上半部分不需要input()是因为agrv，需要注意~
file_again = input("> ")

txt_again = open(file_again)

print(txt_again.read())

from sys import argv
script, filename = argv

print(f"We're gong to erase {filename}.")
print("If you don't want that, hit CTRL-C (^C).")
print("If you do want that, hit RETURN.")

input("?")

print("Opening the file...")
# open()默认的参数是open(file, "rt"), 也就是读取文件内容，没有写入的功能，所以需要改成"w"。
target = open(filename, "w")

print("Truncating the file. Goodbye!")
target.truncate()

print("Now I'm going to ask you for three lines.")
n = "\n"
line1 = input("line 1: ")
line2 = input("line 2: ")
line3 = input("line 3: ")
# 内容简化，比教材中的要简单的多
target.write(line1 + n + line2 + n + line3)

# Zed说：尽量养成关闭文件的习惯，避免日后写大程序的时候，出现信息泄露的风险
print("And finally, we close it.")
target.close()

from sys import argv
script, filename = argv

# 还是那句话，不要忘了f
print(f"{script} is reading {filename}...")

print("The content is down below:")
file_open = open(filename)
print(file_open.read())

# 引入库
from sys import argv
from os.path import exists

# 解包参数
script, from_file, to_file = argv

# 打印任务目标
print(f"Copying from {from_file} to {to_file}")

# we could do these two on one line, how? 如何把这两行写到一行？
in_file = open(from_file)
indata = in_file.read()

# 打印文件字符长度
print(f"The input file is {len(indata)} bytes long")

# ！！！这里是关键，检测目标文件是否存在，不要忘了input()
print(f"Does the output file exist? {exists(to_file)}")
print("Ready, hit RETURN to continue, CTRL-C to abort.")
input()

# 以写入模式打开目标文件
out_file = open(to_file, "w")
# 写入复制的内容
out_file.write(indata)

# 打印“操作完成”，实际上，打印这句话的时候并没有完成
print("Alright, all done.")
# 关闭文件，至于为什么，参考ex16；这里才是真正保存到硬盘
out_file.close()
in_file.close()

# this one is like your scripts with argv
def print_two(*args):
    arg1, arg2 = args
    print(f"arg1: {arg1}, arg2: {arg2}")

# ok, that *args is actually pointless, we can just do this
def print_two_again(arg1, arg2):
    print(f"arg1: {arg1}, arg2: {arg2}")
    
# this just takes one argument
def print_one(arg1):
    print(f"arg1: {arg1}")

# this one takes no arguments
def print_none():
    print("I got nothin'.")

print_two("超", "可爱")
print_two_again("超", "可爱")
print_one("First!")
print_none()

# 给cheese_and_crackers 下定义，创建一个function
def cheese_and_crackers(cheese_count, boxes_of_crackers):
    print(f"You have {cheese_count} cheese!")
    print(f"You have {boxes_of_crackers} boxes of crackers!")
    print("Man that's enough for a party!")
    print("Get a blanket. \n")


# 直接输入参数，进行运算
print("We can just give the function numbers directly:")
cheese_and_crackers(20, 30)


# 以变量方式传入数据进行运算
print("Or, we can use variables from our script:")
amount_of_cheese = 10
amount_of_crackers = 50

cheese_and_crackers(amount_of_cheese, amount_of_crackers)


# 参数内可以进行数学运算
print("We can even do math inside too:")
cheese_and_crackers(10 + 20, 5 + 6)


# 数字和变量可以同时参与运算
print("And we can combine the two, variables and math:")
cheese_and_crackers(amount_of_cheese + 100, amount_of_crackers + 1000)

from sys import argv
script, input_file = argv

# 第一个函数用于打印整个文档
def print_all(f):
    print(f.read())

# 第二个函数用来重置指针，把指针放到文件开头位置
def rewind(f):
    f.seek(0)

# 第三个函数用于打印指定行内容
def print_a_line(line_count, f):
    print(line_count, f.readline())

# 要.read()文件首先要open才能打印出来
current_file = open(input_file)

# 首先打印全文
print("First let's print the whole file:")
print_all(current_file)

# 打印之后的指针已经在文档末尾了，所以需要复位
print("Now let's rewind, kind of like a tape.")
rewind(current_file)

# 打印每行内容
print("Let's print three lines:")
current_line = 1
print_a_line(current_line, current_file)

current_line = current_line + 1
print_a_line(current_line, current_file)

current_line = current_line + 1
print_a_line(current_line, current_file)

def add(a, b):
    print(f"ADDING {a} + {b}")
    return a + b

def subtract(a, b):
    print(f"SUBTRACTING {a} - {b}")
    return a - b

def multiply(a, b):
    print(f"MULTIPLYING {a} * {b}")
    return a * b

def divide(a, b):
    print(f"DIVIDING {a} / {b}")
    return a / b


print("Let's do some math with just functions!")

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print(f"Age: {age}, Height: {height}, Weight: {weight}, IQ: {iq}")


# A puzzle for the extra credit, type it in anyway.
print("Here is a puzzle.")

what = add(age, subtract(height, multiply(weight, divide(iq, 2))))

print("That becomes: ", what, "Can you do it by hand?")