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Author Anthony Sottile
Recipients Anthony Sottile, miss-islington, taleinat, terry.reedy
Date 2021-01-25.04:31:00
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1611549063.39.0.582327012337.issue43013@roundup.psfhosted.org>
In-reply-to
Content
just noticed this PR -- you might be interested in pyupgrade which automates some of these things -- here's (for example) `git ls-files -- Lib/idlelib | grep '\.py$' | xargs pyupgrade --py36-plus

```diff
diff --git a/Lib/idlelib/calltip_w.py b/Lib/idlelib/calltip_w.py
index 1e0404aa49..278546064a 100644
--- a/Lib/idlelib/calltip_w.py
+++ b/Lib/idlelib/calltip_w.py
@@ -25,7 +25,7 @@ def __init__(self, text_widget):
         text_widget: a Text widget with code for which call-tips are desired
         """
         # Note: The Text widget will be accessible as self.anchor_widget
-        super(CalltipWindow, self).__init__(text_widget)
+        super().__init__(text_widget)
 
         self.label = self.text = None
         self.parenline = self.parencol = self.lastline = None
@@ -54,7 +54,7 @@ def position_window(self):
             return
         self.lastline = curline
         self.anchor_widget.see("insert")
-        super(CalltipWindow, self).position_window()
+        super().position_window()
 
     def showtip(self, text, parenleft, parenright):
         """Show the call-tip, bind events which will close it and reposition it.
@@ -73,7 +73,7 @@ def showtip(self, text, parenleft, parenright):
         self.parenline, self.parencol = map(
             int, self.anchor_widget.index(parenleft).split("."))
 
-        super(CalltipWindow, self).showtip()
+        super().showtip()
 
         self._bind_events()
 
@@ -143,7 +143,7 @@ def hidetip(self):
             # ValueError may be raised by MultiCall
             pass
 
-        super(CalltipWindow, self).hidetip()
+        super().hidetip()
 
     def _bind_events(self):
         """Bind event handlers."""
diff --git a/Lib/idlelib/debugger.py b/Lib/idlelib/debugger.py
index ccd03e46e1..53dba376af 100644
--- a/Lib/idlelib/debugger.py
+++ b/Lib/idlelib/debugger.py
@@ -49,9 +49,9 @@ def __frame2message(self, frame):
         filename = code.co_filename
         lineno = frame.f_lineno
         basename = os.path.basename(filename)
-        message = "%s:%s" % (basename, lineno)
+        message = f"{basename}:{lineno}"
         if code.co_name != "?":
-            message = "%s: %s()" % (message, code.co_name)
+            message = f"{message}: {code.co_name}()"
         return message
 
 
@@ -213,7 +213,7 @@ def interaction(self, message, frame, info=None):
                 m1 = "%s" % str(type)
             if value is not None:
                 try:
-                    m1 = "%s: %s" % (m1, str(value))
+                    m1 = "{}: {}".format(m1, str(value))
                 except:
                     pass
             bg = "yellow"
diff --git a/Lib/idlelib/debugobj.py b/Lib/idlelib/debugobj.py
index 5a4c997884..71d01c7070 100644
--- a/Lib/idlelib/debugobj.py
+++ b/Lib/idlelib/debugobj.py
@@ -87,7 +87,7 @@ def GetSubList(self):
                 continue
             def setfunction(value, key=key, object=self.object):
                 object[key] = value
-            item = make_objecttreeitem("%r:" % (key,), value, setfunction)
+            item = make_objecttreeitem(f"{key!r}:", value, setfunction)
             sublist.append(item)
         return sublist
 
diff --git a/Lib/idlelib/editor.py b/Lib/idlelib/editor.py
index a4d0c95362..5faebb5742 100644
--- a/Lib/idlelib/editor.py
+++ b/Lib/idlelib/editor.py
@@ -37,12 +37,12 @@
 def _sphinx_version():
     "Format sys.version_info to produce the Sphinx version string used to install the chm docs"
     major, minor, micro, level, serial = sys.version_info
-    release = '%s%s' % (major, minor)
-    release += '%s' % (micro,)
+    release = f'{major}{minor}'
+    release += f'{micro}'
     if level == 'candidate':
-        release += 'rc%s' % (serial,)
+        release += f'rc{serial}'
     elif level != 'final':
-        release += '%s%s' % (level[0], serial)
+        release += '{}{}'.format(level[0], serial)
     return release
 
 
@@ -939,7 +939,7 @@ def update_recent_files_list(self, new_file=None):
         rf_list = []
         file_path = self.recent_files_path
         if file_path and os.path.exists(file_path):
-            with open(file_path, 'r',
+            with open(file_path,
                       encoding='utf_8', errors='replace') as rf_list_file:
                 rf_list = rf_list_file.readlines()
         if new_file:
@@ -1446,7 +1446,7 @@ def newline_and_indent_event(self, event):
                     else:
                         self.reindent_to(y.compute_backslash_indent())
                 else:
-                    assert 0, "bogus continuation type %r" % (c,)
+                    assert 0, f"bogus continuation type {c!r}"
                 return "break"
 
             # This line starts a brand new statement; indent relative to
diff --git a/Lib/idlelib/filelist.py b/Lib/idlelib/filelist.py
index 0d200854ef..9b863698a0 100644
--- a/Lib/idlelib/filelist.py
+++ b/Lib/idlelib/filelist.py
@@ -22,7 +22,7 @@ def open(self, filename, action=None):
             # This can happen when bad filename is passed on command line:
             tkMessageBox.showerror(
                 "File Error",
-                "%r is a directory." % (filename,),
+                f"{filename!r} is a directory.",
                 master=self.root)
             return None
         key = os.path.normcase(filename)
@@ -90,7 +90,7 @@ def filename_changed_edit(self, edit):
             self.inversedict[conflict] = None
             tkMessageBox.showerror(
                 "Name Conflict",
-                "You now have multiple edit windows open for %r" % (filename,),
+                f"You now have multiple edit windows open for {filename!r}",
                 master=self.root)
         self.dict[newkey] = edit
         self.inversedict[edit] = newkey
diff --git a/Lib/idlelib/idle_test/test_config.py b/Lib/idlelib/idle_test/test_config.py
index 697fda5279..08ed76fe28 100644
--- a/Lib/idlelib/idle_test/test_config.py
+++ b/Lib/idlelib/idle_test/test_config.py
@@ -191,7 +191,7 @@ def setUpClass(cls):
             idle_dir = os.path.abspath(sys.path[0])
         for ctype in conf.config_types:
             config_path = os.path.join(idle_dir, '../config-%s.def' % ctype)
-            with open(config_path, 'r') as f:
+            with open(config_path) as f:
                 cls.config_string[ctype] = f.read()
 
         cls.orig_warn = config._warn
diff --git a/Lib/idlelib/idle_test/test_text.py b/Lib/idlelib/idle_test/test_text.py
index 0f31179e04..43a9ba02c3 100644
--- a/Lib/idlelib/idle_test/test_text.py
+++ b/Lib/idlelib/idle_test/test_text.py
@@ -6,7 +6,7 @@
 from test.support import requires
 from _tkinter import TclError
 
-class TextTest(object):
+class TextTest:
     "Define items common to both sets of tests."
 
     hw = 'hello\nworld'  # Several tests insert this after initialization.
diff --git a/Lib/idlelib/macosx.py b/Lib/idlelib/macosx.py
index eeaab59ae8..fbc6499faa 100644
--- a/Lib/idlelib/macosx.py
+++ b/Lib/idlelib/macosx.py
@@ -81,7 +81,7 @@ def tkVersionWarning(root):
         patchlevel = root.tk.call('info', 'patchlevel')
         if patchlevel not in ('8.5.7', '8.5.9'):
             return False
-        return ("WARNING: The version of Tcl/Tk ({0}) in use may"
+        return ("WARNING: The version of Tcl/Tk ({}) in use may"
                 " be unstable.\n"
                 "Visit http://www.python.org/download/mac/tcltk/"
                 " for current information.".format(patchlevel))
diff --git a/Lib/idlelib/multicall.py b/Lib/idlelib/multicall.py
index dc02001292..0200f445cc 100644
--- a/Lib/idlelib/multicall.py
+++ b/Lib/idlelib/multicall.py
@@ -52,9 +52,9 @@
     _modifier_masks = (MC_CONTROL, MC_ALT, MC_SHIFT, MC_META)
 
 # a dictionary to map a modifier name into its number
-_modifier_names = dict([(name, number)
+_modifier_names = {name: number
                          for number in range(len(_modifiers))
-                         for name in _modifiers[number]])
+                         for name in _modifiers[number]}
 
 # In 3.4, if no shell window is ever open, the underlying Tk widget is
 # destroyed before .__del__ methods here are called.  The following
@@ -134,7 +134,7 @@ def nbits(n):
         return nb
     statelist = []
     for state in states:
-        substates = list(set(state & x for x in states))
+        substates = list({state & x for x in states})
         substates.sort(key=nbits, reverse=True)
         statelist.append(substates)
     return statelist
@@ -258,9 +258,9 @@ def __del__(self):
 _binder_classes = (_ComplexBinder,) * 4 + (_SimpleBinder,) * (len(_types)-4)
 
 # A dictionary to map a type name into its number
-_type_names = dict([(name, number)
+_type_names = {name: number
                      for number in range(len(_types))
-                     for name in _types[number]])
+                     for name in _types[number]}
 
 _keysym_re = re.compile(r"^\w+$")
 _button_re = re.compile(r"^[1-5]$")
diff --git a/Lib/idlelib/outwin.py b/Lib/idlelib/outwin.py
index 5ab08bbaf4..ac67c904ab 100644
--- a/Lib/idlelib/outwin.py
+++ b/Lib/idlelib/outwin.py
@@ -42,7 +42,7 @@ def file_line_helper(line):
         if match:
             filename, lineno = match.group(1, 2)
             try:
-                f = open(filename, "r")
+                f = open(filename)
                 f.close()
                 break
             except OSError:
diff --git a/Lib/idlelib/pyshell.py b/Lib/idlelib/pyshell.py
index abe8a85952..6cae951698 100755
--- a/Lib/idlelib/pyshell.py
+++ b/Lib/idlelib/pyshell.py
@@ -245,7 +245,7 @@ def store_file_breaks(self):
         breaks = self.breakpoints
         filename = self.io.filename
         try:
-            with open(self.breakpointPath, "r") as fp:
+            with open(self.breakpointPath) as fp:
                 lines = fp.readlines()
         except OSError:
             lines = []
@@ -275,7 +275,7 @@ def restore_file_breaks(self):
         if filename is None:
             return
         if os.path.isfile(self.breakpointPath):
-            with open(self.breakpointPath, "r") as fp:
+            with open(self.breakpointPath) as fp:
                 lines = fp.readlines()
             for line in lines:
                 if line.startswith(filename + '='):
@@ -431,7 +431,7 @@ def build_subprocess_arglist(self):
         # run from the IDLE source directory.
         del_exitf = idleConf.GetOption('main', 'General', 'delete-exitfunc',
                                        default=False, type='bool')
-        command = "__import__('idlelib.run').run.main(%r)" % (del_exitf,)
+        command = f"__import__('idlelib.run').run.main({del_exitf!r})"
         return [sys.executable] + w + ["-c", command, str(self.port)]
 
     def start_subprocess(self):
@@ -564,9 +564,9 @@ def transfer_path(self, with_cwd=False):
 
         self.runcommand("""if 1:
         import sys as _sys
-        _sys.path = %r
+        _sys.path = {!r}
         del _sys
-        \n""" % (path,))
+        \n""".format(path))
 
     active_seq = None
 
@@ -693,14 +693,14 @@ def stuffsource(self, source):
     def prepend_syspath(self, filename):
         "Prepend sys.path with file's directory if not already included"
         self.runcommand("""if 1:
-            _filename = %r
+            _filename = {!r}
             import sys as _sys
             from os.path import dirname as _dirname
             _dir = _dirname(_filename)
             if not _dir in _sys.path:
                 _sys.path.insert(0, _dir)
             del _filename, _sys, _dirname, _dir
-            \n""" % (filename,))
+            \n""".format(filename))
 
     def showsyntaxerror(self, filename=None):
         """Override Interactive Interpreter method: Use Colorizing
@@ -1407,7 +1407,7 @@ def main():
     try:
         opts, args = getopt.getopt(sys.argv[1:], "c:deihnr:st:")
     except getopt.error as msg:
-        print("Error: %s\n%s" % (msg, usage_msg), file=sys.stderr)
+        print(f"Error: {msg}\n{usage_msg}", file=sys.stderr)
         sys.exit(2)
     for o, a in opts:
         if o == '-c':
@@ -1539,9 +1539,9 @@ def main():
     if cmd or script:
         shell.interp.runcommand("""if 1:
             import sys as _sys
-            _sys.argv = %r
+            _sys.argv = {!r}
             del _sys
-            \n""" % (sys.argv,))
+            \n""".format(sys.argv))
         if cmd:
             shell.interp.execsource(cmd)
         elif script:
diff --git a/Lib/idlelib/redirector.py b/Lib/idlelib/redirector.py
index 9ab34c5acf..9891d256f7 100644
--- a/Lib/idlelib/redirector.py
+++ b/Lib/idlelib/redirector.py
@@ -47,7 +47,7 @@ def __init__(self, widget):
         tk.createcommand(w, self.dispatch)
 
     def __repr__(self):
-        return "%s(%s<%s>)" % (self.__class__.__name__,
+        return "{}({}<{}>)".format(self.__class__.__name__,
                                self.widget.__class__.__name__,
                                self.widget._w)
 
@@ -143,7 +143,7 @@ def __init__(self, redir, operation):
         self.orig_and_operation = (redir.orig, operation)
 
     def __repr__(self):
-        return "%s(%r, %r)" % (self.__class__.__name__,
+        return "{}({!r}, {!r})".format(self.__class__.__name__,
                                self.redir, self.operation)
 
     def __call__(self, *args):
diff --git a/Lib/idlelib/rpc.py b/Lib/idlelib/rpc.py
index 8efcf048fa..062e2502de 100644
--- a/Lib/idlelib/rpc.py
+++ b/Lib/idlelib/rpc.py
@@ -174,7 +174,7 @@ def localcall(self, seq, request):
         except TypeError:
             return ("ERROR", "Bad request format")
         if oid not in self.objtable:
-            return ("ERROR", "Unknown object id: %r" % (oid,))
+            return ("ERROR", f"Unknown object id: {oid!r}")
         obj = self.objtable[oid]
         if methodname == "__methods__":
             methods = {}
@@ -185,7 +185,7 @@ def localcall(self, seq, request):
             _getattributes(obj, attributes)
             return ("OK", attributes)
         if not hasattr(obj, methodname):
-            return ("ERROR", "Unsupported method name: %r" % (methodname,))
+            return ("ERROR", f"Unsupported method name: {methodname!r}")
         method = getattr(obj, methodname)
         try:
             if how == 'CALL':
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index ec575c3d48..099240d56b 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -43,13 +43,13 @@ def idle_formatwarning(message, category, filename, lineno, line=None):
     """Format warnings the IDLE way."""
 
     s = "\nWarning (from warnings module):\n"
-    s += '  File \"%s\", line %s\n' % (filename, lineno)
+    s += f'  File \"{filename}\", line {lineno}\n'
     if line is None:
         line = linecache.getline(filename, lineno)
     line = line.strip()
     if line:
         s += "    %s\n" % line
-    s += "%s: %s\n" % (category.__name__, message)
+    s += f"{category.__name__}: {message}\n"
     return s
 
 def idle_showwarning_subproc(
diff --git a/Lib/idlelib/textview.py b/Lib/idlelib/textview.py
index a66c1a4309..23f0f4cb50 100644
--- a/Lib/idlelib/textview.py
+++ b/Lib/idlelib/textview.py
@@ -169,7 +169,7 @@ def view_file(parent, title, filename, encoding, modal=True, wrap='word',
     with contents of the file.
     """
     try:
-        with open(filename, 'r', encoding=encoding) as file:
+        with open(filename, encoding=encoding) as file:
             contents = file.read()
     except OSError:
         showerror(title='File Load Error',
diff --git a/Lib/idlelib/tooltip.py b/Lib/idlelib/tooltip.py
index d714318dae..3983690dd4 100644
--- a/Lib/idlelib/tooltip.py
+++ b/Lib/idlelib/tooltip.py
@@ -92,7 +92,7 @@ def __init__(self, anchor_widget, hover_delay=1000):
         e.g. after hovering over the anchor widget with the mouse for enough
         time.
         """
-        super(OnHoverTooltipBase, self).__init__(anchor_widget)
+        super().__init__(anchor_widget)
         self.hover_delay = hover_delay
 
         self._after_id = None
@@ -107,7 +107,7 @@ def __del__(self):
             self.anchor_widget.unbind("<Button>", self._id3) # pragma: no cover
         except TclError:
             pass
-        super(OnHoverTooltipBase, self).__del__()
+        super().__del__()
 
     def _show_event(self, event=None):
         """event handler to display the tooltip"""
@@ -139,7 +139,7 @@ def hidetip(self):
             self.unschedule()
         except TclError:  # pragma: no cover
             pass
-        super(OnHoverTooltipBase, self).hidetip()
+        super().hidetip()
 
 
 class Hovertip(OnHoverTooltipBase):
@@ -154,7 +154,7 @@ def __init__(self, anchor_widget, text, hover_delay=1000):
         e.g. after hovering over the anchor widget with the mouse for enough
         time.
         """
-        super(Hovertip, self).__init__(anchor_widget, hover_delay=hover_delay)
+        super().__init__(anchor_widget, hover_delay=hover_delay)
         self.text = text
 
     def showcontents(self):
diff --git a/Lib/idlelib/tree.py b/Lib/idlelib/tree.py
index 5947268f5c..5f30f0f609 100644
--- a/Lib/idlelib/tree.py
+++ b/Lib/idlelib/tree.py
@@ -32,7 +32,7 @@
 if os.path.isdir(_icondir):
     ICONDIR = _icondir
 elif not os.path.isdir(ICONDIR):
-    raise RuntimeError("can't find icon directory (%r)" % (ICONDIR,))
+    raise RuntimeError(f"can't find icon directory ({ICONDIR!r})")
 
 def listicons(icondir=ICONDIR):
     """Utility to display the available icons."""
diff --git a/Lib/idlelib/undo.py b/Lib/idlelib/undo.py
index 85ecffecb4..5f10c0f05c 100644
--- a/Lib/idlelib/undo.py
+++ b/Lib/idlelib/undo.py
@@ -309,7 +309,7 @@ def __repr__(self):
         s = self.__class__.__name__
         strs = []
         for cmd in self.cmds:
-            strs.append("    %r" % (cmd,))
+            strs.append(f"    {cmd!r}")
         return s + "(\n" + ",\n".join(strs) + "\n)"
 
     def __len__(self):
```
History
Date User Action Args
2021-01-25 04:31:03Anthony Sottilesetrecipients: + Anthony Sottile, terry.reedy, taleinat, miss-islington
2021-01-25 04:31:03Anthony Sottilesetmessageid: <1611549063.39.0.582327012337.issue43013@roundup.psfhosted.org>
2021-01-25 04:31:03Anthony Sottilelinkissue43013 messages
2021-01-25 04:31:00Anthony Sottilecreate