gentools 1.1.0

安装

pip install gentools

示例

• 使生成器函数可重用：

>>>@reusable...defcountdown(value,step):...whilevalue>0:...yieldvalue...value-=step>>>from_3=countdown(3,step=1)>>>list(from_3)[3,2,1]>>>list(from_3)[3,2,1]>>>isinstance(from_3,countdown)# generator func is wrapped in a classTrue>>>from_3.step# attribute access to arguments1>>>from_3.replace(value=5)# create new instance with replaced fieldscountdown(value=5,step=1)# descriptive repr()

• 映射生成器的yield、send和return值：

>>>@map_return('final value: {}'.format)...@map_send(int)...@map_yield('the current max is: {}'.format)...defmy_max(value):...whilevalue<100:...newvalue=yieldvalue...ifnewvalue>value:...value=newvalue...returnvalue>>>gen=my_max(5)>>>next(gen)'the current max is: 5'>>>gen.send(11.3)'the current max is: 11'>>>gen.send(104)StopIteration('final value: 104')

• 通过另一个生成器中继生成器的屈服/发送交互：

>>>deftry_until_positive(outvalue):...value=yieldoutvalue...whilevalue<0:...value=yield'not positive, try again'...returnvalue>>>@relay(try_until_positive)...defmy_max(value):...whilevalue<100:...newvalue=yieldvalue...ifnewvalue>value:...value=newvalue...returnvalue>>>gen=my_max(5)>>>next(gen)5>>>gen.send(-4)'not positive, try again'>>>gen.send(-1)'not positive, try again'>>>gen.send(8)8>>>gen.send(104)StopIteration(104)

• 使用return使python 2/3兼容生成器。

>>>@py2_compatible...defmy_max(value):...whilevalue<100:...newvalue=yieldvalue...ifnewvalue>value:...value=newvalue...return_(value)

发布历史记录