安装

pip install lazyprop

例子1

from lazyprop import lazyprop

class Foo(object):
    def __init__(self):
        self.load_count = 0

    @lazyprop
    def lazy(self):
        self.load_count += 1

f = Foo()
f.lazy
f.lazy
f.lazy
print(f.load_count)

输出：

1

例子2

from lazyprop import lazyprop

class Foo(object):
    def __init__(self):
        self.load_count = 0

    # @lazyprop
    def lazy(self):
        self.load_count += 1

f = Foo()
f.lazy
f.lazy
f.lazy
print(f.load_count)

输出：

0

参考：

  1. Github