dir()函数在python模块的使用

import Titan

print(dir(Titan))

# 输出结果:

['__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'age', 'name', 'sayBad', 'sayGood', 'sayNice']

print(dir())

# 输出结果:

['Titan', '__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__']

# 这里定义一个新的变量

sum = 30

print(dir())

# 输出结果:

['Titan', '__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'sum']

# 把定义的变量删除后

del sum

print(dir())

# 输出结果:

['Titan', '__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__']