Avoid unnecessary calls to keys() when iterating over dictionaries.

dict objects provide an __iter__ method for the iteration which gives you the
keys, so calling keys directly is unnecessary, and isn't really a best
practice.  The only time you really need to call the keys is if there's a
danger of the dict changing out from underneith you, either due to external
forces or due to modification of the iterable in the loop.  Iterations over
os.environ are apparently subject to such changes, so they must continue to
use keys().

As an aside, also switches a couple spots to using sorted() rather than
creating a temporary list with keys() and sorting that.

Signed-off-by: Chris Larson <clarson@mvista.com>

6 files changed, 20 insertions, 29 deletions

diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 5f9beccca..938bdeaae 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -219,18 +219,15 @@ class BBCooker:
         latest_versions = {}
 
         # Sort by priority
-        for pn in pkg_pn.keys():
+        for pn in pkg_pn:
             (last_ver,last_file,pref_ver,pref_file) = bb.providers.findBestProvider(pn, self.configuration.data, self.status)
             preferred_versions[pn] = (pref_ver, pref_file)
             latest_versions[pn] = (last_ver, last_file)
 
-        pkg_list = pkg_pn.keys()
-        pkg_list.sort()
-
         bb.msg.plain("%-35s %25s %25s" % ("Package Name", "Latest Version", "Preferred Version"))
         bb.msg.plain("%-35s %25s %25s\n" % ("============", "==============", "================="))
 
-        for p in pkg_list:
+        for p in sorted(pkg_pn):
             pref = preferred_versions[p]
             latest = latest_versions[p]
 
@@ -487,7 +484,7 @@ class BBCooker:
             self.status.preferred[providee] = provider
 
         # Calculate priorities for each file
-        for p in self.status.pkg_fn.keys():
+        for p in self.status.pkg_fn:
             self.status.bbfile_priority[p] = calc_bbfile_priority(p)
 
     def buildWorldTargetList(self):
diff --git a/lib/bb/data_smart.py b/lib/bb/data_smart.py
index 988d5c357..dac7fb705 100644
--- a/lib/bb/data_smart.py
+++ b/lib/bb/data_smart.py
@@ -219,7 +219,7 @@ class DataSmart:
         if not var in self.dict:
             self._makeShadowCopy(var)
 
-        for i in flags.keys():
+        for i in flags:
             if i == "content":
                 continue
             self.dict[var][i] = flags[i]
@@ -229,7 +229,7 @@ class DataSmart:
         flags = {}
 
         if local_var:
-            for i in local_var.keys():
+            for i in local_var:
                 if i == "content":
                     continue
                 flags[i] = local_var[i]
diff --git a/lib/bb/fetch/__init__.py b/lib/bb/fetch/__init__.py
index 9aa6aaf2d..598a41bf9 100644
--- a/lib/bb/fetch/__init__.py
+++ b/lib/bb/fetch/__init__.py
@@ -139,7 +139,7 @@ def encodeurl(decoded):
         url += "%s" % host
     url += "%s" % path
     if p:
-        for parm in p.keys():
+        for parm in p:
             url += ";%s=%s" % (parm, p[parm])
 
     return url
@@ -169,7 +169,7 @@ def uri_replace(uri, uri_find, uri_replace, d):
 #               bb.msg.note(1, bb.msg.domain.Fetcher, "uri_replace: no match")
                 return uri
 #           else:
-#               for j in i.keys():
+#               for j in i:
 #                   FIXME: apply replacements against options
     return bb.encodeurl(result_decoded)
 
diff --git a/lib/bb/manifest.py b/lib/bb/manifest.py
index 4e4b7d98e..418367759 100644
--- a/lib/bb/manifest.py
+++ b/lib/bb/manifest.py
@@ -96,7 +96,7 @@ def mangle (func, line, d):
         varmap["${datadir}"] = "${STAGING_DATADIR}"
 
         matched = 0
-        for key in varmap.keys():
+        for key in varmap:
             if dest.startswith(key):
                 dest = varmap[key] + "/" + dest[len(key):]
                 matched = 1
diff --git a/lib/bb/providers.py b/lib/bb/providers.py
index f85fa6f2c..058996ba5 100644
--- a/lib/bb/providers.py
+++ b/lib/bb/providers.py
@@ -50,14 +50,10 @@ def sortPriorities(pn, dataCache, pkg_pn = None):
         if preference not in priorities[priority]:
             priorities[priority][preference] = []
         priorities[priority][preference].append(f)
-    pri_list = priorities.keys()
-    pri_list.sort(lambda a, b: a - b)
     tmp_pn = []
-    for pri in pri_list:
-        pref_list = priorities[pri].keys()
-        pref_list.sort(lambda a, b: b - a)
+    for pri in sorted(priorities, lambda a, b: a - b):
         tmp_pref = []
-        for pref in pref_list:
+        for pref in sorted(priorities[pri], lambda a, b: b - a):
             tmp_pref.extend(priorities[pri][pref])
         tmp_pn = [tmp_pref] + tmp_pn
 
@@ -196,14 +192,14 @@ def _filterProviders(providers, item, cfgData, dataCache):
     bb.msg.debug(1, bb.msg.domain.Provider, "providers for %s are: %s" % (item, pkg_pn.keys()))
 
     # First add PREFERRED_VERSIONS
-    for pn in pkg_pn.keys():
+    for pn in pkg_pn:
         sortpkg_pn[pn] = sortPriorities(pn, dataCache, pkg_pn)
         preferred_versions[pn] = findPreferredProvider(pn, cfgData, dataCache, sortpkg_pn[pn], item)
         if preferred_versions[pn][1]:
             eligible.append(preferred_versions[pn][1])
 
     # Now add latest versions
-    for pn in sortpkg_pn.keys():
+    for pn in sortpkg_pn:
         if pn in preferred_versions and preferred_versions[pn][1]:
             continue
         preferred_versions[pn] = findLatestProvider(pn, cfgData, dataCache, sortpkg_pn[pn][0])
diff --git a/lib/bb/shell.py b/lib/bb/shell.py
index 66e51719a..7abea0f12 100644
--- a/lib/bb/shell.py
+++ b/lib/bb/shell.py
@@ -147,7 +147,7 @@ class BitBakeShellCommands:
         global last_exception
         globexpr = params[0]
         self._checkParsed()
-        names = globfilter( cooker.status.pkg_pn.keys(), globexpr )
+        names = globfilter( cooker.status.pkg_pn, globexpr )
         if len( names ) == 0: names = [ globexpr ]
         print "SHELL: Building %s" % ' '.join( names )
 
@@ -294,9 +294,7 @@ class BitBakeShellCommands:
     def help( self, params ):
         """Show a comprehensive list of commands and their purpose"""
         print "="*30, "Available Commands", "="*30
-        allcmds = cmds.keys()
-        allcmds.sort()
-        for cmd in allcmds:
+        for cmd in sorted(cmds):
             function,numparams,usage,helptext = cmds[cmd]
             print "| %s | %s" % (usage.ljust(30), helptext)
         print "="*78
@@ -322,10 +320,10 @@ class BitBakeShellCommands:
         what, globexpr = params
         if what == "files":
             self._checkParsed()
-            for key in globfilter( cooker.status.pkg_fn.keys(), globexpr ): print key
+            for key in globfilter( cooker.status.pkg_fn, globexpr ): print key
         elif what == "providers":
             self._checkParsed()
-            for key in globfilter( cooker.status.pkg_pn.keys(), globexpr ): print key
+            for key in globfilter( cooker.status.pkg_pn, globexpr ): print key
         else:
             print "Usage: match %s" % self.print_.usage
     match.usage = "<files|providers> <glob>"
@@ -473,10 +471,10 @@ SRC_URI = ""
         what = params[0]
         if what == "files":
             self._checkParsed()
-            for key in cooker.status.pkg_fn.keys(): print key
+            for key in cooker.status.pkg_fn: print key
         elif what == "providers":
             self._checkParsed()
-            for key in cooker.status.providers.keys(): print key
+            for key in cooker.status.providers: print key
         else:
             print "Usage: print %s" % self.print_.usage
     print_.usage = "<files|providers>"
@@ -571,7 +569,7 @@ def completeFilePath( bbfile ):
     """Get the complete bbfile path"""
     if not cooker.status: return bbfile
     if not cooker.status.pkg_fn: return bbfile
-    for key in cooker.status.pkg_fn.keys():
+    for key in cooker.status.pkg_fn:
         if key.endswith( bbfile ):
             return key
     return bbfile
@@ -615,7 +613,7 @@ def completer( text, state ):
                     allmatches = cooker.configuration.data.keys()
                 elif u == "<bbfile>":
                     if cooker.status.pkg_fn is None: allmatches = [ "(No Matches Available. Parsed yet?)" ]
-                    else: allmatches = [ x.split("/")[-1] for x in cooker.status.pkg_fn.keys() ]
+                    else: allmatches = [ x.split("/")[-1] for x in cooker.status.pkg_fn ]
                 elif u == "<providee>":
                     if cooker.status.pkg_fn is None: allmatches = [ "(No Matches Available. Parsed yet?)" ]
                     else: allmatches = cooker.status.providers.iterkeys()