Added a few missing use cases

README.md

@@ -17,7 +17,7 @@ Using Simport
 
     # For modules not in the Python Path
     function = simport.load('/path/to/file.py|module_name:myfunction')
-    class_method = simport.load('/path/to/file.py|module_name:MyClasss.mymethod')
+    class_method = simport.load('/path/to/file.py|module_name:MyClass.mymethod')
 
 Running Tests
 =============

simport/__init__.py

@@ -16,6 +16,7 @@
 import imp
 import logging
 import os
+import os.path
 import sys
 
 
@@ -52,16 +53,23 @@ def _get_module(target):
     the module loaded as normal.
     """
 
-    directory, sep, namespace = target.rpartition('|')
+    filepath, sep, namespace = target.rpartition('|')
+    if sep and not filepath:
+        raise BadDirectory("Path to file not supplied.")
+
     module, sep, class_or_function = namespace.rpartition(':')
-    if not module:
+    if (sep and not module) or (filepath and not module):
         raise MissingModule("Need a module path for %s (%s)" %
                             (namespace, target))
 
-    if directory and directory not in sys.path:
-        if not os.path.isdir(directory):
-            raise BadDirectory("No such directory: '%s'" % directory)
-        sys.path.append(directory)
+    path = ""
+    filename = ""
+    if filepath:
+        path, filename = os.path.split(filepath)
+    if path and path not in sys.path:
+        if not os.path.isdir(path):
+            raise BadDirectory("No such directory: '%s'" % path)
+        sys.path.append(path)
 
     if not class_or_function:
         raise MissingMethodOrFunction("No Method or Function specified")

tests/test_simport.py

@@ -16,8 +16,9 @@ class DummyClass(object):
 
 class TestSimport(unittest.TestCase):
     def test_bad_targets(self):
-        self.assertRaises(simport.MissingModule, simport._get_module,
-                          "missing.py")
+        self.assertRaises(simport.BadDirectory, simport._get_module,
+                          "|foo.Class")
+
         self.assertRaises(simport.MissingModule, simport._get_module,
                           "missing.py|")
 
@@ -25,6 +26,8 @@ class TestSimport(unittest.TestCase):
                           "simport_tests/localmodule.py|")
         self.assertRaises(simport.MissingModule, simport._get_module,
                           "simport_tests/localmodule.py|Foo")
+        self.assertRaises(simport.BadDirectory, simport._get_module,
+                          "/does/not/exist/foo.py|foo:Class")
 
         self.assertFalse("AnyModuleName" in sys.modules)
         self.assertRaises(simport.MissingMethodOrFunction, simport._get_module,