diff --git a/buildutils/build.py b/buildutils/build.py
index c85a5cc..efbe739 100644
--- a/buildutils/build.py
+++ b/buildutils/build.py
@@ -4,7 +4,6 @@ import subprocess
 import os
 import shutil
 import sys
-import tempfile
 
 def build_libcapnp(bundle_dir, build_dir, verbose=False):
     '''
diff --git a/examples/async_calculator_client.py b/examples/async_calculator_client.py
index de9c823..90f29f9 100755
--- a/examples/async_calculator_client.py
+++ b/examples/async_calculator_client.py
@@ -26,16 +26,16 @@ class PowerFunction(calculator_capnp.Calculator.Function.Server):
 
 
 async def myreader(client, reader):
-  while True:
-    data = await reader.read(4096)
-    client.write(data)
+    while True:
+        data = await reader.read(4096)
+        client.write(data)
 
 
 async def mywriter(client, writer):
-  while True:
-    data = await client.read(4096)
-    writer.write(data.tobytes())
-    await writer.drain()
+    while True:
+        data = await client.read(4096)
+        writer.write(data.tobytes())
+        await writer.drain()
 
 
 def parse_args():
@@ -52,16 +52,16 @@ async def main(host):
     port = host[1]
     # Handle both IPv4 and IPv6 cases
     try:
-      print("Try IPv4")
-      reader, writer = await asyncio.open_connection(
-        addr, port,
-      )
-    except:
-      print("Try IPv6")
-      reader, writer = await asyncio.open_connection(
-        addr, port,
-        family=socket.AF_INET6
-      )
+        print("Try IPv4")
+        reader, writer = await asyncio.open_connection(
+            addr, port,
+        )
+    except Exception:
+        print("Try IPv6")
+        reader, writer = await asyncio.open_connection(
+            addr, port,
+            family=socket.AF_INET6
+        )
 
     # Start TwoPartyClient using TwoWayPipe (takes no arguments in this mode)
     client = capnp.TwoPartyClient()
diff --git a/examples/async_calculator_server.py b/examples/async_calculator_server.py
index 1316571..8324902 100755
--- a/examples/async_calculator_server.py
+++ b/examples/async_calculator_server.py
@@ -4,23 +4,22 @@ from __future__ import print_function
 import argparse
 import asyncio
 import socket
-import random
 import capnp
 
 import calculator_capnp
 
 
 async def myreader(client, reader):
-  while True:
-    data = await reader.read(4096)
-    await client.write(data)
+    while True:
+        data = await reader.read(4096)
+        await client.write(data)
 
 
 async def mywriter(client, writer):
-  while True:
-    data = await client.read(4096)
-    writer.write(data.tobytes())
-    await writer.drain()
+    while True:
+        data = await client.read(4096)
+        writer.write(data.tobytes())
+        await writer.drain()
 
 
 def read_value(value):
@@ -167,7 +166,7 @@ async def main():
             myserver,
             addr, port,
         )
-    except:
+    except Exception:
         print("Try IPv6")
         server = await asyncio.start_server(
             myserver,
diff --git a/examples/async_reconnecting_ssl_client.py b/examples/async_reconnecting_ssl_client.py
index ca93836..a4967bf 100755
--- a/examples/async_reconnecting_ssl_client.py
+++ b/examples/async_reconnecting_ssl_client.py
@@ -6,10 +6,10 @@ import asyncio
 import argparse
 import os
 import time
-import capnp
 import socket
 import ssl
-import time
+
+import capnp
 
 import thread_capnp
 
@@ -51,7 +51,6 @@ async def mywriter(client, writer):
             # to try again
             data = await asyncio.wait_for(client.read(4096), timeout=1.0)
             writer.write(data.tobytes())
-            #await writer.drain()
         except asyncio.TimeoutError:
             continue
 
diff --git a/test/test_examples.py b/test/test_examples.py
index dfbff5e..1477f59 100644
--- a/test/test_examples.py
+++ b/test/test_examples.py
@@ -1,8 +1,6 @@
-import gc
 import os
 import socket
 import subprocess
-import sys  # add examples dir to sys.path
 import time
 
 examples_dir = os.path.join(os.path.dirname(__file__), '..', 'examples')