A possible introduction for projects

jedi/api/environment.py

@@ -98,7 +98,10 @@ class InterpreterEnvironment(_BaseEnvironment):
 
 def _get_virtual_env_from_var():
     var = os.environ.get('VIRTUAL_ENV')
-    if var is not None and var != sys.prefix:
+    if var is not None:
+        if var == sys.prefix:
+            return DefaultEnvironment()
+
         try:
             return create_environment(var)
         except InvalidPythonEnvironment:
@@ -179,6 +182,11 @@ def create_environment(path):
     return Environment(path, _get_executable_path(path, safe=False))
 
 
+def from_executable(executable):
+    path = os.path.dirname(os.path.dirname(executable))
+    return Environment(path, executable)
+
+
 def _get_executable_path(path, safe=True):
     """
     Returns None if it's not actually a virtual env.