python 学习day 8

1、代码学习部分

 

# #python学习笔记
with open ('learning_python.txt')as file_object:
    contents=file_object.read()
    print(contents.rstrip())


filename='learning_python.txt'
with open (filename)as file_object:
    for line in file_object:
        print(line.rstrip())


filename='learning_python.txt'
with open (filename)as file_object:
    lines=file_object.readlines()
for line in lines:
    print(line.rstrip())


# #Java语言学习笔记
filename='learning_python.txt'
with open (filename)as file_object:
    lines=file_object.readlines()
learning_string=''
for line in lines:
    learning_string+=line.replace('Python','Java')
print(learning_string)

#10-3 访客：
name_file=input("Please input your name： ")

with open('guest.txt','w') as file_object:
    file_object.write(name_file+"\n")

#10-4 访客名单：
while(True):
    name_file = input("Please input your name： ")
    if name_file == 'quit':
        break
    print("Good morning, "+name_file)
    print("Please input 'quit' to stop input.")
    with open('guest.txt', 'a') as file_object:
        file_object.write(name_file+" just login in."+'\n')

#10-5关于编程的调查：
while(True):
    reason=input("Please tell me the reason why you love python: ")
    if reason == 'quit':
        break
    print("Please input 'quit' to stop input.")
    with open('reason.txt', 'a') as file_object:
        file_object.write(reason+'\n')

#10-6 加法运算
print("Give me two numbers, and I'll plus them.")
number1=input("Please input the first number: ")
try:number1=int(number1)
except ValueError:
    print("Your input is not number.\nPlease check your input.")
number2=input("Please input the second number: ")
try:
    number2 = int(number2)
except ValueError:
    print("Your input is not number.\nPlease check your input.")
result=int(number1)+int(number2)
print("Result is: "+str(result))          #这里print中result是数值，要用str改为字符串才可输出



#10-7 加法计算器：
print("Give me two numbers, and I'll plus them.")
print("Enter 'q' to quit.")
while(True):
    number1=input("Please input the first number: ")
    if number1=='q':
        break
    number2=input("Please input the second number: ")
    if number2=='q':
        break
    try:
        result=int(number1)+int(number2)
    except ValueError:
        print("Your input is not number.\nPlease check your input.")
    else:
        print(result)


#猫和狗
try:
    filename='cats.txt'
    with open (filename)as file_object:
        for line in file_object:
            print(line.rstrip())
    filename='dogs.txt'
    with open (filename)as file_object:
        for line in file_object:
            print(line.rstrip())
except FileNotFoundError:
    print("File is not found.")

#沉默的猫和狗
try:
    filename='cats.txt'
    with open (filename)as file_object:
#         for line in file_object:
            print(line.rstrip())
    filename='dogs.txt'
    with open (filename)as file_object:
        for line in file_object:
            print(line.rstrip())
except FileNotFoundError:
    pass

#常见单词：
filename='book.txt'
try:
    with open(filename)as file_object:
        contents=file_object.read()
        print(contents.count('the'))
except FileNotFoundError:
    print("File is not found.")


#10-11喜欢的数字：
import json
favorite_number=input("Please input your favorite number: ")

filename='favorite_number.json'
with open(filename,'w')as file_object:
    json.dump(favorite_number,file_object)

with open(filename)as file_object:
    favorite_number=json.load(file_object)
    print("I know your favourite number!It's "+favorite_number)


#10-12 记住喜欢的数字
import json
filename='favorite_number.json'
try:
    with open(filename)as file_object:
        favorite_number=json.load(file_object)
except FileNotFoundError:
    favorite_number=input("Please input your favorite number: ")
    with open(filename,'w')as file_object:
        json.dump(favorite_number,file_object)
        print("We will remember your favourite number when you come back!")
else:
    print("I know your favourite number!It's " + favorite_number)


#10-13 验证用户
import json

def get_stored_username():
    """如果存储了用户名，就获取它"""
    filename='username.json'
    try:
        with open(filename)as file_object:
            username=json.load(file_object)
    except FileNotFoundError:
        return None
    else:
        comfirm=input('If your name is '+username+'?(y/n)')
        if comfirm=='y':
            return username
        else:
            username=get_new_username()

def get_new_username():
    """提示用户输入用户名"""
    username=input("What's your name?")
    filename='username.json'
    with open(filename,'w')as file_object:
        json.dump(username,file_object)
    return username

def greet_user():
    """问候用户，并指出其名字"""
    username=get_stored_username()
    if username:
        print("Welcom back, "+username+'!')
    else:
        username=get_new_username()
        print("We'll remember you when you come back, "+username+'!')
greet_user()

#10-13 验证用户
import json

def get_stored_username():
    filename = 'username.json'
    with open(filename) as f_obj:
        username = f_obj.read()
    return username

def get_new_username():
    username = input("What is your name? ")
    filename = 'username.json'
    with open(filename, 'w') as f_obj:
        json.dump(username, f_obj)
    return username

def greet_user():
    username = get_stored_username()
    username = str(username)
    if username:
        yep=input('Is ' + username + ' your name?(y/n)')
        print (yep)
        if  yep == 'y':
            print("Welcome back, " + username + "!")
        else:
            username = get_new_username()
            print("We'll remember you when you come back, " + username + "!")
    else:
        username = get_new_username()
        print("We'll remember you when you come back, " + username + "!")
greet_user()