--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/planemo/database/interface.py	Thu May 14 14:56:58 2020 -0400
@@ -0,0 +1,36 @@
+"""Describe the interface classes of the planemo.database package."""
+
+import abc
+
+
+class DatabaseSource(object):
+    """Interface describing a source of profile databases."""
+
+    __metaclass__ = abc.ABCMeta
+
+    @abc.abstractmethod
+    def create_database(self, identifier):
+        """Create a database with specified short identifier.
+
+        Throw an exception if it already exists.
+        """
+
+    @abc.abstractmethod
+    def delete_database(self, identifier):
+        """Delete a database with specified short identifier.
+
+        Throw an exception if it already exists.
+        """
+
+    @abc.abstractmethod
+    def list_databases(self):
+        """Return identifiers associated with database source."""
+
+    @abc.abstractmethod
+    def sqlalchemy_url(self, identifier):
+        """Return a URL string for use by sqlalchemy."""
+
+
+__all__ = (
+    "DatabaseSource",
+)