gistfile1.py

from addict import Dict
body = Dict()
body.size = 0
body.query.filtered.filter.has_parent.type = 'repos'
body.query.filtered.query.filtered.filter.term.tags = 'python'
body.facets.committers.terms_stats = {'key_field': 'committer.name.raw',
                                      'value_field': 'stats.lines'}

result = es.search(index='git', doc_type='commits', body=body)