diff --git a/letsencrypt/client/CONFIG.py b/letsencrypt/client/CONFIG.py
index 832b5b4ce..8c7c4b6d4 100644
--- a/letsencrypt/client/CONFIG.py
+++ b/letsencrypt/client/CONFIG.py
@@ -40,13 +40,13 @@ NONCE_SIZE = 16
 RSA_KEY_SIZE = 2048
 
 # bits of hashcash to generate
-difficulty = 23 
+difficulty = 23
 
 # Let's Encrypt cert and chain files
 CERT_PATH = CERT_DIR + "cert-letsencrypt.pem"
 CHAIN_PATH = CERT_DIR + "chain-letsencrypt.pem"
 
-#Invalid Extension                                                              
+#Invalid Extension
 INVALID_EXT = ".acme.invalid"
 
 # Challenge Preferences Dict for currently supported challenges
diff --git a/letsencrypt/client/acme.py b/letsencrypt/client/acme.py
index 306ee9171..70a5982ad 100755
--- a/letsencrypt/client/acme.py
+++ b/letsencrypt/client/acme.py
@@ -19,9 +19,9 @@ def acme_object_validate(j):
     j = json.loads(j)
     if not isinstance(j, dict):
         raise jsonschema.ValidationError("this is not a dictionary object")
-    if not j.has_key("type"):
+    if "type" not in j:
         raise jsonschema.ValidationError("missing type field")
-    if not schemata.has_key(j["type"]):
+    if j["type"] not in schemata:
         raise jsonschema.ValidationError("unknown type %s" % j["type"])
     jsonschema.validate(j, schemata[j["type"]])
 
diff --git a/letsencrypt/client/challenge.py b/letsencrypt/client/challenge.py
index a25e60be0..2ccf9406f 100644
--- a/letsencrypt/client/challenge.py
+++ b/letsencrypt/client/challenge.py
@@ -10,4 +10,3 @@ class Challenge(object):
         logger.error("Error - base class challenge.generate_response()")
     def clean(self):
         logger.error("Error - base class challenge.clean()")
-
diff --git a/letsencrypt/client/client.py b/letsencrypt/client/client.py
index 0f625804d..198c4139c 100755
--- a/letsencrypt/client/client.py
+++ b/letsencrypt/client/client.py
@@ -688,7 +688,7 @@ class Client(object):
     def sanity_check_names(self, names):
         for name in names:
             if not self.is_hostname_sane(name):
-                logger.fatal(`name` + " is an impossible hostname")
+                logger.fatal(repr(name) + " is an impossible hostname")
                 sys.exit(81)
 
     def is_hostname_sane(self, hostname):
diff --git a/letsencrypt/client/configurator.py b/letsencrypt/client/configurator.py
index 6f5aabf58..c5b0e1f92 100644
--- a/letsencrypt/client/configurator.py
+++ b/letsencrypt/client/configurator.py
@@ -907,12 +907,12 @@ LogLevel warn \n\
         Enables mod_ssl
         """
         try:
-	    # Use check_output so the command will finish before reloading
+            # Use check_output so the command will finish before reloading
             subprocess.check_call(["sudo", "a2enmod", mod_name], stdout=open("/dev/null", 'w'), stderr=open("/dev/null", 'w'))
             # Hopefully this waits for output
             subprocess.check_call(["sudo", "/etc/init.d/apache2", "restart"], stdout=open("/dev/null", 'w'), stderr=open("/dev/null", 'w'))
         except:
-	    logger.error("Error enabling mod_" + mod_name)
+            logger.error("Error enabling mod_" + mod_name)
             sys.exit(1)
 
     def fnmatch_to_re(self, cleanFNmatch):
diff --git a/letsencrypt/client/logger.py b/letsencrypt/client/logger.py
index b285c2359..86a8da846 100644
--- a/letsencrypt/client/logger.py
+++ b/letsencrypt/client/logger.py
@@ -168,8 +168,3 @@ if __name__ == "__main__":
     logger.error("errrrr")
 
     logger.trace("some trace data: %d - %f - %s" % (5, 8.3, 'cows'))
-
-
-
-
-
diff --git a/letsencrypt/client/payment_challenge.py b/letsencrypt/client/payment_challenge.py
index 773975d68..e3c4494d5 100644
--- a/letsencrypt/client/payment_challenge.py
+++ b/letsencrypt/client/payment_challenge.py
@@ -43,4 +43,3 @@ class Payment_Challenge(Challenge):
 
     def formatted_reasons(self):
         return "\n\t* %s\n" % self.reason
-