python注释

1、单行注释

符号：#

# a = 10

2、多行注释

符号：三个单引号或三个双引号

"""
交换a,b的值
"""
a = 10
b = 20
a, b = b, a
print(a, b)     # 20 10

'''
exchange a and b value
'''
a = 10
b = 20
a, b = b, a
print(a, b)     # 20 10