[docs] [issue30621] import json before using json module in tutorial Input and Output

[Mariatta Wijaya]

Mariatta Wijaya added the comment:


New changeset 47c9decb5feabb51416deffd2098ee31d73f1f5f by Mariatta in branch '3.6':
bpo-30621: Update Input Output Tutorial Example(GH-2074) (GH-2118)
https://github.com/python/cpython/commit/47c9decb5feabb51416deffd2098ee31d73f1f5f


----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30621>
_______________________________________