Don't hard-code the python path

diff --git a/examples/add_person.py b/examples/add_person.py
index 78e5696..5a7b968 100755
--- a/examples/add_person.py
+++ b/examples/add_person.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 
 # See README.txt for information and build instructions.
 

diff --git a/examples/list_people.py b/examples/list_people.py
index f9f36b9..d470349 100755
--- a/examples/list_people.py
+++ b/examples/list_people.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 
 # See README.txt for information and build instructions.
 

diff --git a/python/google/protobuf/internal/_parameterized.py b/python/google/protobuf/internal/_parameterized.py
index c44e77e..400b221 100755
--- a/python/google/protobuf/internal/_parameterized.py
+++ b/python/google/protobuf/internal/_parameterized.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/descriptor_database_test.py b/python/google/protobuf/internal/descriptor_database_test.py
index edf66a6..56fe14e 100644
--- a/python/google/protobuf/internal/descriptor_database_test.py
+++ b/python/google/protobuf/internal/descriptor_database_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/descriptor_pool_test.py b/python/google/protobuf/internal/descriptor_pool_test.py
index 6d04eba..7d145f4 100644
--- a/python/google/protobuf/internal/descriptor_pool_test.py
+++ b/python/google/protobuf/internal/descriptor_pool_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/descriptor_test.py b/python/google/protobuf/internal/descriptor_test.py
index 549af08..335caee 100755
--- a/python/google/protobuf/internal/descriptor_test.py
+++ b/python/google/protobuf/internal/descriptor_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/generator_test.py b/python/google/protobuf/internal/generator_test.py
index 50fc19221..ccc5860 100755
--- a/python/google/protobuf/internal/generator_test.py
+++ b/python/google/protobuf/internal/generator_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/message_factory_test.py b/python/google/protobuf/internal/message_factory_test.py
index 45ddcd2..626c3fc 100644
--- a/python/google/protobuf/internal/message_factory_test.py
+++ b/python/google/protobuf/internal/message_factory_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/message_test.py b/python/google/protobuf/internal/message_test.py
index ce79b60..4ecaa1c 100755
--- a/python/google/protobuf/internal/message_test.py
+++ b/python/google/protobuf/internal/message_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/proto_builder_test.py b/python/google/protobuf/internal/proto_builder_test.py
index 9229205..b1e57f3 100644
--- a/python/google/protobuf/internal/proto_builder_test.py
+++ b/python/google/protobuf/internal/proto_builder_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/reflection_test.py b/python/google/protobuf/internal/reflection_test.py
index 8f28f4d..ae79c78 100755
--- a/python/google/protobuf/internal/reflection_test.py
+++ b/python/google/protobuf/internal/reflection_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # Protocol Buffers - Google's data interchange format

diff --git a/python/google/protobuf/internal/service_reflection_test.py b/python/google/protobuf/internal/service_reflection_test.py
index e3f7154..e1c2ad6 100755
--- a/python/google/protobuf/internal/service_reflection_test.py
+++ b/python/google/protobuf/internal/service_reflection_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/symbol_database_test.py b/python/google/protobuf/internal/symbol_database_test.py
index a58cb1a..c888aff 100644
--- a/python/google/protobuf/internal/symbol_database_test.py
+++ b/python/google/protobuf/internal/symbol_database_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/text_encoding_test.py b/python/google/protobuf/internal/text_encoding_test.py
index 48c30f0..27896b9 100755
--- a/python/google/protobuf/internal/text_encoding_test.py
+++ b/python/google/protobuf/internal/text_encoding_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/text_format_test.py b/python/google/protobuf/internal/text_format_test.py
index 0135099..bf7e06e 100755
--- a/python/google/protobuf/internal/text_format_test.py
+++ b/python/google/protobuf/internal/text_format_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/google/protobuf/internal/unknown_fields_test.py b/python/google/protobuf/internal/unknown_fields_test.py
index d116920..9337ae8 100755
--- a/python/google/protobuf/internal/unknown_fields_test.py
+++ b/python/google/protobuf/internal/unknown_fields_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # Protocol Buffers - Google's data interchange format

diff --git a/python/google/protobuf/internal/wire_format_test.py b/python/google/protobuf/internal/wire_format_test.py
index e40a40c..5cd7fcb 100755
--- a/python/google/protobuf/internal/wire_format_test.py
+++ b/python/google/protobuf/internal/wire_format_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.

diff --git a/python/setup.py b/python/setup.py
index fa98cd3..85c1489 100755
--- a/python/setup.py
+++ b/python/setup.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # See README for usage instructions.
 import sys

diff --git a/src/google/protobuf/arena_nc_test.py b/src/google/protobuf/arena_nc_test.py
index fc510a4..f390df3 100644
--- a/src/google/protobuf/arena_nc_test.py
+++ b/src/google/protobuf/arena_nc_test.py

@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.