diff --git a/eventlet/patcher.py b/eventlet/patcher.py
new file mode 100644
index 0000000..ccf581e
--- /dev/null
+++ b/eventlet/patcher.py
@@ -0,0 +1,63 @@
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import sys
+
+
+__exclude = ('__builtins__', '__file__', '__name__')
+
+
+def inject(module_name, new_globals, *additional_modules):
+    ## Put the specified modules in sys.modules for the duration of the import
+    saved = {}
+    for name, mod in additional_modules:
+        saved[name] = sys.modules.get(name, None)
+        sys.modules[name] = mod
+
+    ## Remove the old module from sys.modules and reimport it while the specified modules are in place
+    old_module = sys.modules.pop(module_name, None)
+    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
+
+    if new_globals is not None:
+        ## Update the given globals dictionary with everything from this new module
+        for name in dir(module):
+            if name not in __exclude:
+                new_globals[name] = getattr(module, name)
+
+    ## Keep a reference to the new module to prevent it from dying
+    sys.modules['__patched_module_' + module_name] = module
+    ## Put the original module back
+    if old_module is not None:
+        sys.modules[module_name] = old_module
+    else:
+        del sys.modules[module_name]
+
+    ## Put all the saved modules back
+    for name, mod in additional_modules:
+        if saved[name] is not None:
+            sys.modules[name] = saved[name]
+
+    return module
+
+
+def import_patched(module_name, *additional_modules, **kw_additional_modules):
+    return inject(
+    	module_name,
+    	None,
+    	*additional_modules + tuple(kw_additional_modules.items()))
+