内容对于用户输出，while 循环以及函数
明天所学内容局部须要输出，所以不附运行后果，欢送大家本人尝试
以下内容为用户输出和 while 循环
# input()工作原理，实质是输出字符串
message = input("Tell me something, and I will repeat it back to you:")
print(message)
name = input("Please enter your name:")
print("Hello," + name + "!")
# int()工作原理，实质是将输出视为数值
height = input("How tall are you, in inches?")
height = int(height)
if height >= 36:
print("\nYou're tall enough to ride! ")
else:
print("\nYou'll be able to ride when you're a little older.")
# 求模运算符 %，省略
# while 循环
current_number = 1
while current_number <= 5:
print(current_number)
current_number += 1
# 应用 break 退出循环
prompt = "\nPlease enter the name of a city you have visited:"
prompt += "\n(Enter'quit'when you are finished.)"
while True:
city = input(prompt)
if city == 'quit':
break
else:
print("I'd love to go to "+ city.title() +"!")
# 在循环中应用 continue，满足条件时不再执行接下里的程序，进入下一循环
current_number = 0
while current_number < 10:
current_number += 1
if current_number % 2 == 0:
continue
print(current_number)以下内容为函数
# 向函数传递信息
def greet_user(username):
# 形参 username
print("Hello," + username.title() + "!")
greet_user('jesse') # 实参 'jesse'
# 传递实参
def describe_pet(animal_type, pet_name):
print("\nI have a" + animal_type + ".")
print("My" + animal_type + "'s name is" + pet_name.title() + ".")
describe_pet('hamster', 'harry') # 地位实参，最根本的是基于实参程序, 不能随便调换
describe_pet(animal_type = 'hamster', pet_name = 'harry') # 关键字实参，能够换地位
def describe_pet(pet_name, animal_type = 'dog'): # 蕴含默认值, 且默认值须要在前面
print("\nI have a" + animal_type + ".")
print("My" + animal_type + "'s name is" + pet_name.title() + ".")
describe_pet(pet_name = 'willie')
# 返回值
def get_formatted_name(first_name, last_name):
full_name = first_name + ' ' + last_name
return full_name.title()
musician = get_formatted_name('jimi', 'hendrix')
print(musician)
# 使参数可选
def get_formatted_name(first_name, middle_name, last_name):
if middle_name:
full_name = first_name + '' + middle_name +' ' + last_name
else:
full_name = first_name + ' ' + last_name
return full_name.title()
musician = get_formatted_name('jimi','lee','hendrix')
print(musician)
# 返回字典
def build_person(first_name, last_name):
person = {'first':first_name, 'last':last_name}
return person
person = build_person('jimi', 'hendrix')
print(person)
# 传递列表
def greet_users(names):
for name in names:
msg = "Hello," + name.title() + "!"
print(msg)
usernames = ['hannah', 'ty', 'margot']
greet_users(usernames)
# 禁止函数批改列表
function_name(list_name[:]) #用切片表示法 [:] 创立列表的正本
# 传递任意数量的实参
# 应用形参名 *names, 创立一个空元组，放入所有收到的值
# 能够和一般实参联合应用
# 将函数存储在模块中，应用 import module_name
# 调用模块中的某个函数，module_name.function_name
# 只导入特定的函数，from module_name import function_1,function 2
# 应用 as 指定别名，from module import function as anothername；import module as anothername
# 导入模块中所有的函数，from module import *