Embedding should have public API for interactive mode

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-07-11.14:34:17.168>
labels = ['interpreter-core']
title = 'Embedding should have public API for interactive mode'
updated_at = <Date 2019-12-21.08:12:40.410>
user = 'https://bugs.python.org/steveire'

bugs.python.org fields:

activity = <Date 2019-12-21.08:12:40.410>
actor = 'BTaskaya'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2017-07-11.14:34:17.168>
creator = 'steveire'
dependencies = []
files = []
hgrepos = []
issue_num = 30905
keywords = []
message_count = 2.0
messages = ['298162', '358766']
nosy_count = 4.0
nosy_names = ['vstinner', 'steveire', 'nanjekyejoannah', 'BTaskaya']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue30905'
versions = ['Python 3.6']