make
python3

Python 3.5.2 (default, Sep 14 2017, 22:51:06)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from iterators import *
>>> f = Field()
>>> for i in f.pions:
...     print(i)
... 
1
2
3
4
5
>>> for i in f.bogons:
...     print(i)
...
1
2
3
4
5

>>> x = list_int()
>>> x
<iterators.list_int object at 0x7fb07cabd6f8>
>>> x.assign([1,2,3,4,6])
>>>