init python package for API spec (#93)

Author: jbrockmendel

spec/API_specification/dataframe_api/__init__.py

@@ -0,0 +1,9 @@
+"""
+Function stubs and API documentation for the DataFrame API standard.
+"""
+
+__dataframe_api_version__: str = "YYYY.MM"
+"""
+String representing the version of the DataFrame API specification to which the
+conforming implementation adheres.
+"""

spec/API_specification/dataframe_api/dataframe_object.py

@@ -0,0 +1,5 @@
+__all__ = ["DataFrame"]
+
+
+class DataFrame:
+    pass