便捷提取python导入包的属性

dir

_

yield from

#法1
def e(start='_', module='os'):
module = __import__(module)
def gen_attr():
for attr in dir(module):
if attr.startswith(start):
yield attr
yield from gen_attr()

#法2 利用生成器推导式更简洁
def e2(start='', module='os'):
module = __import__(module)
yield from (attr for attr in dir(module) if attr.startswith(start))

if __name__ == '__main__':
print (list(e('')))
print (list(e2('a')))