input获取用户输入

  1. age = input("How old are you? ")

input获取到的是字符串

int()

int()函数可以转换为整数

  1. age = int(age)
  2. if age >= 16:
  3.     print("You are an audlt")

对应的，float()可以转换为浮点数

Modulo Operator

取余

  1. 3 % 2 # 得到余数1

while循环

  1. prompt = "\nTell me something, and I will repeat it back to you: "
  2. prompt += "\nEnter 'quit' to end the program. "
  4. message = ""
  5. while message != 'quit':
  6.     message = input(prompt)
  7.     print(message)

break和continue的使用与在其他语言中一样

  1. prompt = "Enter a number less than 10"
  2. prompt += "\nEnter 0 to end the game: "
  4. i = 0
  5. while i < 10:
  6.   guess = int(input(prompt))
  8.   if guess == 0:
  9.       break
  10.   elif guess > 10:
  11.     i += 1
  12.     continue
  13.   else:
  14.     print("once again")

while在list和dictionary中的使用

  1. sandwich_orders = ['ham', 'pastrami', 'apple',
  2.                    'beacon', 'pastrami', 'tuna', 'pastrami']
  3. finished_sandwiches = []
  5. print("The Deli has run out of Pastrami")
  7. while 'pastrami' in sandwich_orders:
  8.     sandwich_orders.remove('pastrami')
  10. making = True
  11. while making:
  12.     if sandwich_orders:
  13.         current = sandwich_orders.pop()
  14.         print(f"I made your {current} sandwiches")
  16.         finished_sandwiches.append(current)
  17.     else:
  18.         making = False
  20. print(finished_sandwiches)
  1. responses = {}
  3. polling_active = True
  5. while polling_active:
  6.     name = input("\nWhat is your name? ")
  7.     response = input("Which mountain would you like to climb someday? ")
  9.     responses[name] = response
  11.     repeat = input("Would you like to let another person respond? (yes/no)")
  12.     if repeat == 'no':
  13.         polling_active = False
  15. print("\n--- Poll Results ---")
  16. for name, response in responses.items():
  17.     print(f"{name} would like to climb {response}")