在python中，想要创建一个空类，可以借助pass函数。

# An empty class

class Test:

pass

#定义实例变量

# Python program to show that we can create

# instance variables inside methods

# Class for Computer Science Student

class CSStudent:

# Class Variable

stream = 'cse'

# The init method or constructor

def __init__(self, roll):

# Instance Variable

self.roll = roll

# Adds an instance variable

def setAddress(self, address):

self.address = address

# Retrieves instance variable

def getAddress(self):

return self.address

# Driver Code

a = CSStudent(101)

a.setAddress("Noida, UP")

print(a.getAddress())