--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/virtualenv/app_data/base.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,91 @@
+"""
+Application data stored by virtualenv.
+"""
+from __future__ import absolute_import, unicode_literals
+
+from abc import ABCMeta, abstractmethod
+from contextlib import contextmanager
+
+import six
+
+from virtualenv.info import IS_ZIPAPP
+
+
+@six.add_metaclass(ABCMeta)
+class AppData(object):
+    """Abstract storage interface for the virtualenv application"""
+
+    @abstractmethod
+    def close(self):
+        """called before virtualenv exits"""
+
+    @abstractmethod
+    def reset(self):
+        """called when the user passes in the reset app data"""
+
+    @abstractmethod
+    def py_info(self, path):
+        raise NotImplementedError
+
+    @abstractmethod
+    def py_info_clear(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def embed_update_log(self, distribution, for_py_version):
+        raise NotImplementedError
+
+    @property
+    def house(self):
+        raise NotImplementedError
+
+    @property
+    def transient(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def wheel_image(self, for_py_version, name):
+        raise NotImplementedError
+
+    @contextmanager
+    def ensure_extracted(self, path, to_folder=None):
+        """Some paths might be within the zipapp, unzip these to a path on the disk"""
+        if IS_ZIPAPP:
+            with self.extract(path, to_folder) as result:
+                yield result
+        else:
+            yield path
+
+    @abstractmethod
+    @contextmanager
+    def extract(self, path, to_folder):
+        raise NotImplementedError
+
+    @abstractmethod
+    @contextmanager
+    def locked(self, path):
+        raise NotImplementedError
+
+
+@six.add_metaclass(ABCMeta)
+class ContentStore(object):
+    @abstractmethod
+    def exists(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def read(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def write(self, content):
+        raise NotImplementedError
+
+    @abstractmethod
+    def remove(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    @contextmanager
+    def locked(self):
+        pass