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bpo-30296 Remove unnecessary tuples, lists, sets, and dicts (#1489)

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* Replaced list(<generator expression>) with list comprehension
* Replaced dict(<generator expression>) with dict comprehension
* Replaced set(<list literal>) with set literal
* Replaced builtin func(<list comprehension>) with func(<generator
  expression>) when supported (e.g. any(), all(), tuple(), min(), &
  max())
This commit is contained in:
Jon Dufresne 2017-05-18 07:35:54 -07:00 • committed by Raymond Hettinger
parent 906f5330b9
commit 3972628de3
19 changed files with 32 additions and 39 deletions
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11
Lib/urllib/request.py
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@ -683,8 +683,8 @@ class HTTPRedirectHandler(BaseHandler):
newurl = newurl.replace(' ', '%20')
CONTENT_HEADERS = ("content-length", "content-type")
newheaders = dict((k, v) for k, v in req.headers.items()
if k.lower() not in CONTENT_HEADERS)
newheaders = {k: v for k, v in req.headers.items()
if k.lower() not in CONTENT_HEADERS}
return Request(newurl,
headers=newheaders,
origin_req_host=req.origin_req_host,
@ -845,7 +845,7 @@ class HTTPPasswordMgr:
self.passwd[realm] = {}
for default_port in True, False:
reduced_uri = tuple(
[self.reduce_uri(u, default_port) for u in uri])
self.reduce_uri(u, default_port) for u in uri)
self.passwd[realm][reduced_uri] = (user, passwd)
def find_user_password(self, realm, authuri):
@ -1286,8 +1286,7 @@ class AbstractHTTPHandler(BaseHandler):
h.set_debuglevel(self._debuglevel)
headers = dict(req.unredirected_hdrs)
headers.update(dict((k, v) for k, v in req.headers.items()
if k not in headers))
headers.update((k, v) for k, v in req.headers.items() if k not in headers)
# TODO(jhylton): Should this be redesigned to handle
# persistent connections?
@ -1299,7 +1298,7 @@ class AbstractHTTPHandler(BaseHandler):
# So make sure the connection gets closed after the (only)
# request.
headers["Connection"] = "close"
headers = dict((name.title(), val) for name, val in headers.items())
headers = {name.title(): val for name, val in headers.items()}
if req._tunnel_host:
tunnel_headers = {}