asynchat: PEP8-ify the code

Lib/asynchat.py

@@ -93,7 +93,10 @@ class async_chat (asyncore.dispatcher):
         raise NotImplementedError("must be implemented in subclass")
 
     def set_terminator(self, term):
-        "Set the input delimiter.  Can be a fixed string of any length, an integer, or None"
+        """Set the input delimiter.
+
+        Can be a fixed string of any length, an integer, or None.
+        """
         if isinstance(term, str) and self.use_encoding:
             term = bytes(term, self.encoding)
         self.terminator = term
@@ -155,10 +158,12 @@ class async_chat (asyncore.dispatcher):
                 if index != -1:
                     # we found the terminator
                     if index > 0:
-                        # don't bother reporting the empty string (source of subtle bugs)
+                        # don't bother reporting the empty string
+                        # (source of subtle bugs)
                         self.collect_incoming_data(self.ac_in_buffer[:index])
                     self.ac_in_buffer = self.ac_in_buffer[index+terminator_len:]
-                    # This does the Right Thing if the terminator is changed here.
+                    # This does the Right Thing if the terminator
+                    # is changed here.
                     self.found_terminator()
                 else:
                     # check for a prefix of the terminator
@@ -219,10 +224,8 @@ class async_chat (asyncore.dispatcher):
             if not first:
                 del self.producer_fifo[0]
                 if first is None:
-                    ## print("first is None")
                     self.handle_close()
                     return
-                ## print("first is not None")
 
             # handle classic producer behavior
             obs = self.ac_out_buffer_size
@@ -260,6 +263,7 @@ class async_chat (asyncore.dispatcher):
         del self.incoming[:]
         self.producer_fifo.clear()
 
+
 class simple_producer:
 
     def __init__(self, data, buffer_size=512):
@@ -276,6 +280,7 @@ class simple_producer:
             self.data = b''
             return result
 
+
 class fifo:
     def __init__(self, list=None):
         if not list:
@@ -301,6 +306,7 @@ class fifo:
         else:
             return (0, None)
 
+
 # Given 'haystack', see if any prefix of 'needle' is at its end.  This
 # assumes an exact match has already been checked.  Return the number of
 # characters matched.

Lib/test/test_asynchat.py

@@ -5,9 +5,12 @@ from test import support
 # If this fails, the test will be skipped.
 thread = support.import_module('_thread')
 
-import asyncore, asynchat, socket, time
-import unittest
+import asynchat
+import asyncore
+import socket
 import sys
+import time
+import unittest
 try:
     import threading
 except ImportError:
@@ -28,8 +31,8 @@ if threading:
             self.event = event
             self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
             self.port = support.bind_port(self.sock)
-            # This will be set if the client wants us to wait before echoing data
-            # back.
+            # This will be set if the client wants us to wait before echoing
+            # data back.
             self.start_resend_event = None
 
         def run(self):
@@ -52,8 +55,8 @@ if threading:
 
             # re-send entire set of collected data
             try:
-                # this may fail on some tests, such as test_close_when_done, since
-                # the client closes the channel when it's done sending
+                # this may fail on some tests, such as test_close_when_done,
+                # since the client closes the channel when it's done sending
                 while self.buffer:
                     n = conn.send(self.buffer[:self.chunk_size])
                     time.sleep(0.001)
@@ -269,11 +272,13 @@ class TestAsynchat(unittest.TestCase):
 class TestAsynchat_WithPoll(TestAsynchat):
     usepoll = True
 
+
 class TestHelperFunctions(unittest.TestCase):
     def test_find_prefix_at_end(self):
         self.assertEqual(asynchat.find_prefix_at_end("qwerty\r", "\r\n"), 1)
         self.assertEqual(asynchat.find_prefix_at_end("qwertydkjf", "\r\n"), 0)
 
+
 class TestFifo(unittest.TestCase):
     def test_basic(self):
         f = asynchat.fifo()