Python 2.4 support. closes pika#4

THANKS

@@ -0,0 +1 @@
+Github's enlavin (Miguel Hernandez Martos) and itkach for patches for python 2.4 support.

examples/demo_receive.py

@@ -56,12 +56,12 @@
 import asyncore
 
 conn = pika.AsyncoreConnection(pika.ConnectionParameters(
-        sys.argv[1] if len(sys.argv) > 1 else '127.0.0.1',
+        (len(sys.argv) > 1) and sys.argv[1] or '127.0.0.1',
         credentials = pika.PlainCredentials('guest', 'guest')))
 
 print 'Connected to %r' % (conn.server_properties,)
 
-qname = sys.argv[2] if len(sys.argv) > 2 else 'test'
+qname = (len(sys.argv) > 2) and sys.argv[2] or 'test'
 
 ch = conn.channel()
 ch.queue_declare(queue=qname, durable=True, exclusive=False, auto_delete=False)

examples/demo_send.py

@@ -56,7 +56,7 @@
 import asyncore
 
 conn = pika.AsyncoreConnection(pika.ConnectionParameters(
-        sys.argv[1] if len(sys.argv) > 1 else '127.0.0.1',
+        (len(sys.argv) > 1) and sys.argv[1] or '127.0.0.1',
         credentials=pika.PlainCredentials('guest', 'guest')))
 
 ch = conn.channel()

pika/__init__.py

@@ -63,3 +63,13 @@
 
 def repl_channel(host = '127.0.0.1', *args):
     return BlockingConnection(ConnectionParameters(host, *args)).channel()
+
+# Python 2.4 support: add struct.unpack_from if it's missing.
+try:
+    import struct
+    getattr(struct, "unpack_from")
+except AttributeError:
+    def _unpack_from(fmt, buf, offset=0):
+        slice = buffer(buf, offset, struct.calcsize(fmt))
+        return struct.unpack(fmt, slice)
+    struct.unpack_from = _unpack_from

pika/simplebuffer.py

@@ -60,6 +60,11 @@
 except ImportError:
     import StringIO
 
+# Python 2.4 support: os lacks SEEK_END and friends
+try:
+    getattr(os, "SEEK_END")
+except AttributeError:
+    os.SEEK_SET, os.SEEK_CUR, os.SEEK_END = range(3)
 
 class SimpleBuffer:
     """
@@ -145,7 +150,7 @@ def flush(self):
 
     def __nonzero__(self):
         """ Are we empty? """
-        return True if self.size else False
+        return self.size > 0
 
     def __len__(self):
         return self.size
@@ -155,4 +160,4 @@ def __str__(self):
 
     def __repr__(self):
         return '<SimpleBuffer of %i bytes, %i total size, %r%s>' % \
-                    (self.size, self.size + self.offset, self.read(16), '...' if self.size > 16 else '')
+                    (self.size, self.size + self.offset, self.read(16), (self.size > 16) and '...' or '')