Converted dict comprehensions to use literals. (#8342)

3 files changed, 4 insertions, 4 deletions

diff --git a/acme/acme/client.py b/acme/acme/client.py
index f66367c38..d52c84373 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -448,7 +448,7 @@ class Client(ClientBase):
         heapq.heapify(waiting)
         # mapping between original Authorization Resource and the most
         # recently updated one
-        updated = dict((authzr, authzr) for authzr in authzrs)
+        updated = {authzr: authzr for authzr in authzrs}
 
         while waiting:
             # find the smallest Retry-After, and sleep if necessary
diff --git a/acme/acme/messages.py b/acme/acme/messages.py
index 8c9bf9701..6325ed57f 100644
--- a/acme/acme/messages.py
+++ b/acme/acme/messages.py
@@ -206,7 +206,7 @@ class Directory(jose.JSONDeSerializable):
         external_account_required = jose.Field('externalAccountRequired', omitempty=True)
 
         def __init__(self, **kwargs):
-            kwargs = dict((self._internal_name(k), v) for k, v in kwargs.items())
+            kwargs = {self._internal_name(k): v for k, v in kwargs.items()}
             super(Directory.Meta, self).__init__(**kwargs)
 
         @property
@@ -465,7 +465,7 @@ class ChallengeBody(ResourceBody):
                        omitempty=True, default=None)
 
     def __init__(self, **kwargs):
-        kwargs = dict((self._internal_name(k), v) for k, v in kwargs.items())
+        kwargs = {self._internal_name(k): v for k, v in kwargs.items()}
         super(ChallengeBody, self).__init__(**kwargs)
 
     def encode(self, name):
diff --git a/acme/acme/util.py b/acme/acme/util.py
index 1fff89a9e..b3b0d79eb 100644
--- a/acme/acme/util.py
+++ b/acme/acme/util.py
@@ -4,4 +4,4 @@ import six
 
 def map_keys(dikt, func):
     """Map dictionary keys."""
-    return dict((func(key), value) for key, value in six.iteritems(dikt))
+    return {func(key): value for key, value in six.iteritems(dikt)}