g = ((i+2)**2 for i in range(10))
print(g)
<generator object <genexpr> at 0x0000000002AECDB0>
tuple(g)
(4, 9, 16, 25, 36, 49, 64, 81, 100, 121)
list(g)
[]
g.__next__()
4
g.__next__()
9
next(k)
16
>>> info = {'name':'lijia','id':'100','sex':'f','address':'beijing'}
>>> new_id=input("please input new id")
please input new id30
>>> info['id']=int(new_id)
>>> print("id:%id"%info['id'])
id:30d