Python常用代码．

以下是一些Python常用代码：

1. 输出

print("Hello, World!")

2. 变量

x = 5
y = "John"
print(x)
print(y)

3. 数据类型

x = 5
y = 3.14
z = "Hello"
print(type(x))
print(type(y))
print(type(z))

4. 运算符

x = 5
y = 3
print(x + y)
print(x - y)
print(x * y)
print(x / y)
print(x % y)
print(x ** y)
print(x // y)

5. 列表

fruits = ["apple", "banana", "cherry"]
print(fruits)
print(fruits[1])
fruits[1] = "kiwi"
print(fruits)

6. 循环

fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)

7. 条件语句

x = 5
y = 10
if x > y:
  print("x is greater than y")
elif x < y:
  print("x is less than y")
else:
  print("x and y are equal")

8. 函数

def my_function(fname, lname):
  print(fname + " " + lname)

my_function("John", "Doe")

9. 类

class Person:
  def __init__(self, name, age):
    self.name = name
    self.age = age

p1 = Person("John", 36)

print(p1.name)
print(p1.age)

以上是一些常用的Python代码片段，希望对你有所帮助！