feat(python): impl client

Former-commit-id: 5942800965b780c395b9f8dc1975245ab74138a8

python/sdk/examples/connection_exp.py

+from megasearch.client.Client import Connection
+
+client = Connection()
+
+# param =
+# client.connect(param)
\ No newline at end of file

python/sdk/requirements.txt

+atomicwrites==1.3.0
+attrs==19.1.0
+importlib-metadata==0.17
+mock==3.0.5
+more-itertools==7.0.0
+packaging==19.0
+pathlib2==2.3.3
+pluggy==0.12.0
+py==1.8.0
+pyparsing==2.4.0
+pytest==4.6.0
+six==1.12.0
+thrift==0.11.0
+wcwidth==0.1.7
+zipp==0.5.1