Patch# 1258 by Christian Heimes: kill basestring.

I like this because it makes the code shorter! :-)

Include/stringobject.h

@@ -48,7 +48,6 @@ typedef struct {
      */
 } PyStringObject;
 
-PyAPI_DATA(PyTypeObject) PyBaseString_Type;
 PyAPI_DATA(PyTypeObject) PyString_Type;
 
 #define PyString_Check(op) \

Lib/ConfigParser.py

@@ -271,7 +271,7 @@ class RawConfigParser:
 
         Return list of successfully read files.
         """
-        if isinstance(filenames, basestring):
+        if isinstance(filenames, str):
             filenames = [filenames]
         read_ok = []
         for filename in filenames:
@@ -652,7 +652,7 @@ class SafeConfigParser(ConfigParser):
 
     def set(self, section, option, value):
         """Set an option.  Extend ConfigParser.set: check for string values."""
-        if not isinstance(value, basestring):
+        if not isinstance(value, str):
             raise TypeError("option values must be strings")
         # check for bad percent signs:
         # first, replace all "good" interpolations

Lib/UserString.py

@@ -11,7 +11,7 @@ __all__ = ["UserString","MutableString"]
 
 class UserString:
     def __init__(self, seq):
-        if isinstance(seq, basestring):
+        if isinstance(seq, str):
             self.data = seq
         elif isinstance(seq, UserString):
             self.data = seq.data[:]
@@ -66,12 +66,12 @@ class UserString:
     def __add__(self, other):
         if isinstance(other, UserString):
             return self.__class__(self.data + other.data)
-        elif isinstance(other, basestring):
+        elif isinstance(other, str):
             return self.__class__(self.data + other)
         else:
             return self.__class__(self.data + str(other))
     def __radd__(self, other):
-        if isinstance(other, basestring):
+        if isinstance(other, str):
             return self.__class__(other + self.data)
         else:
             return self.__class__(str(other) + self.data)
@@ -184,7 +184,7 @@ class MutableString(UserString):
         if isinstance(index, slice):
             if isinstance(sub, UserString):
                 sub = sub.data
-            elif not isinstance(sub, basestring):
+            elif not isinstance(sub, str):
                 sub = str(sub)
             start, stop, step = index.indices(len(self.data))
             if step == -1:
@@ -221,7 +221,7 @@ class MutableString(UserString):
     def __iadd__(self, other):
         if isinstance(other, UserString):
             self.data += other.data
-        elif isinstance(other, basestring):
+        elif isinstance(other, str):
             self.data += other
         else:
             self.data += str(other)

Lib/_abcoll.py

@@ -490,7 +490,8 @@ class Sequence(metaclass=ABCMeta):
         return sum(1 for v in self if v == value)
 
 Sequence.register(tuple)
-Sequence.register(basestring)
+Sequence.register(str)
+Sequence.register(str8)
 Sequence.register(memoryview)
 
 

Lib/binhex.py

@@ -169,7 +169,7 @@ class _Rlecoderengine:
 class BinHex:
     def __init__(self, name_finfo_dlen_rlen, ofp):
         name, finfo, dlen, rlen = name_finfo_dlen_rlen
-        if isinstance(ofp, basestring):
+        if isinstance(ofp, str):
             ofname = ofp
             ofp = io.open(ofname, 'wb')
             if os.name == 'mac':
@@ -371,7 +371,7 @@ class _Rledecoderengine:
 
 class HexBin:
     def __init__(self, ifp):
-        if isinstance(ifp, basestring):
+        if isinstance(ifp, str):
             ifp = io.open(ifp, 'rb')
         #
         # Find initial colon.

Lib/cProfile.py

@@ -153,7 +153,7 @@ class Profile(_lsprof.Profiler):
 # ____________________________________________________________
 
 def label(code):
-    if isinstance(code, basestring):
+    if isinstance(code, str):
         return ('~', 0, code)    # built-in functions ('~' sorts at the end)
     else:
         return (code.co_filename, code.co_firstlineno, code.co_name)

Lib/cmd.py

@@ -356,7 +356,7 @@ class Cmd:
             return
 
         nonstrings = [i for i in range(len(list))
-                        if not isinstance(list[i], basestring)]
+                        if not isinstance(list[i], str)]
         if nonstrings:
             raise TypeError("list[i] not a string for i in %s"
                             % ", ".join(map(str, nonstrings)))

Lib/cookielib.py

@@ -367,7 +367,7 @@ def split_header_words(header_values):
     [[('Basic', None), ('realm', '"foobar"')]]
 
     """
-    assert not isinstance(header_values, basestring)
+    assert not isinstance(header_values, str)
     result = []
     for text in header_values:
         orig_text = text

Lib/copy_reg.py

@@ -114,7 +114,7 @@ def _slotnames(cls):
             if "__slots__" in c.__dict__:
                 slots = c.__dict__['__slots__']
                 # if class has a single slot, it can be given as a string
-                if isinstance(slots, basestring):
+                if isinstance(slots, str):
                     slots = (slots,)
                 for name in slots:
                     # special descriptors

Lib/decimal.py

@@ -588,7 +588,7 @@ class Decimal(object):
 
         # From a string
         # REs insist on real strings, so we can too.
-        if isinstance(value, basestring):
+        if isinstance(value, str):
             if _isinfinity(value):
                 self._exp = 'F'
                 self._int = (0,)

Lib/distutils/ccompiler.py

@@ -154,7 +154,7 @@ class CCompiler:
             self.set_executable(key, value)
 
     def set_executable(self, key, value):
-        if isinstance(value, basestring):
+        if isinstance(value, str):
             setattr(self, key, split_quoted(value))
         else:
             setattr(self, key, value)
@@ -175,8 +175,8 @@ class CCompiler:
         for defn in definitions:
             if not (isinstance(defn, tuple) and
                     (len(defn) in (1, 2) and
-                      (isinstance (defn[1], basestring) or defn[1] is None)) and
-                    isinstance (defn[0], basestring)):
+                      (isinstance (defn[1], str) or defn[1] is None)) and
+                    isinstance (defn[0], str)):
                 raise TypeError(("invalid macro definition '%s': " % defn) + \
                       "must be tuple (string,), (string, string), or " + \
                       "(string, None)")
@@ -318,7 +318,7 @@ class CCompiler:
         """
         if outdir is None:
             outdir = self.output_dir
-        elif not isinstance(outdir, basestring):
+        elif not isinstance(outdir, str):
             raise TypeError("'output_dir' must be a string or None")
 
         if macros is None:
@@ -415,7 +415,7 @@ class CCompiler:
         """
         if output_dir is None:
             output_dir = self.output_dir
-        elif not isinstance(output_dir, basestring):
+        elif not isinstance(output_dir, str):
             raise TypeError("'output_dir' must be a string or None")
 
         if macros is None:
@@ -494,7 +494,7 @@ class CCompiler:
 
         if output_dir is None:
             output_dir = self.output_dir
-        elif not isinstance(output_dir, basestring):
+        elif not isinstance(output_dir, str):
             raise TypeError("'output_dir' must be a string or None")
 
         return (objects, output_dir)

Lib/distutils/cmd.py

@@ -213,7 +213,7 @@ class Command:
         if val is None:
             setattr(self, option, default)
             return default
-        elif not isinstance(val, basestring):
+        elif not isinstance(val, str):
             raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
                                        % (option, what, val))
         return val
@@ -233,11 +233,11 @@ class Command:
         val = getattr(self, option)
         if val is None:
             return
-        elif isinstance(val, basestring):
+        elif isinstance(val, str):
             setattr(self, option, re.split(r',\s*|\s+', val))
         else:
             if isinstance(val, list):
-                ok = all(isinstance(v, basestring) for v in val)
+                ok = all(isinstance(v, str) for v in val)
             else:
                 ok = False
             if not ok:
@@ -390,7 +390,7 @@ class Command:
 
 
         # Allow 'infiles' to be a single string
-        if isinstance(infiles, basestring):
+        if isinstance(infiles, str):
             infiles = (infiles,)
         elif not isinstance(infiles, (list, tuple)):
             raise TypeError(

Lib/distutils/command/build_clib.py

@@ -86,7 +86,7 @@ class build_clib(Command):
 
         if self.include_dirs is None:
             self.include_dirs = self.distribution.include_dirs or []
-        if isinstance(self.include_dirs, basestring):
+        if isinstance(self.include_dirs, str):
             self.include_dirs = self.include_dirs.split(os.pathsep)
 
         # XXX same as for build_ext -- what about 'self.define' and
@@ -134,7 +134,7 @@ class build_clib(Command):
                 raise DistutilsSetupError(
                       "each element of 'libraries' must a 2-tuple")
 
-            if isinstance(lib[0], basestring):
+            if isinstance(lib[0], str):
                 raise DistutilsSetupError(
                       "first element of each tuple in 'libraries' "
                       "must be a string (the library name)")

Lib/distutils/command/build_ext.py

@@ -133,7 +133,7 @@ class build_ext(Command):
         plat_py_include = sysconfig.get_python_inc(plat_specific=1)
         if self.include_dirs is None:
             self.include_dirs = self.distribution.include_dirs or []
-        if isinstance(self.include_dirs, basestring):
+        if isinstance(self.include_dirs, str):
             self.include_dirs = self.include_dirs.split(os.pathsep)
 
         # Put the Python "system" include dir at the end, so that
@@ -142,7 +142,7 @@ class build_ext(Command):
         if plat_py_include != py_include:
             self.include_dirs.append(plat_py_include)
 
-        if isinstance(self.libraries, basestring):
+        if isinstance(self.libraries, str):
             self.libraries = [self.libraries]
 
         # Life is easier if we're not forever checking for None, so
@@ -151,12 +151,12 @@ class build_ext(Command):
             self.libraries = []
         if self.library_dirs is None:
             self.library_dirs = []
-        elif isinstance(self.library_dirs, basestring):
+        elif isinstance(self.library_dirs, str):
             self.library_dirs = self.library_dirs.split(os.pathsep)
 
         if self.rpath is None:
             self.rpath = []
-        elif isinstance(self.rpath, basestring):
+        elif isinstance(self.rpath, str):
             self.rpath = self.rpath.split(os.pathsep)
 
         # for extensions under windows use different directories
@@ -309,7 +309,7 @@ class build_ext(Command):
                        "each element of 'ext_modules' option must be an "
                        "Extension instance or 2-tuple")
 
-            if not (isinstance(ext_name, basestring) and
+            if not (isinstance(ext_name, str) and
                     extension_name_re.match(ext_name)):
                 raise DistutilsSetupError(
                        "first element of each tuple in 'ext_modules' "

Lib/distutils/command/build_py.py

@@ -325,7 +325,7 @@ class build_py (Command):
         return outputs
 
     def build_module(self, module, module_file, package):
-        if isinstance(package, basestring):
+        if isinstance(package, str):
             package = package.split('.')
         elif not isinstance(package, (list, tuple)):
             raise TypeError(

Lib/distutils/command/config.py

@@ -69,17 +69,17 @@ class config(Command):
     def finalize_options(self):
         if self.include_dirs is None:
             self.include_dirs = self.distribution.include_dirs or []
-        elif isinstance(self.include_dirs, basestring):
+        elif isinstance(self.include_dirs, str):
             self.include_dirs = self.include_dirs.split(os.pathsep)
 
         if self.libraries is None:
             self.libraries = []
-        elif isinstance(self.libraries, basestring):
+        elif isinstance(self.libraries, str):
             self.libraries = [self.libraries]
 
         if self.library_dirs is None:
             self.library_dirs = []
-        elif isinstance(self.library_dirs, basestring):
+        elif isinstance(self.library_dirs, str):
             self.library_dirs = self.library_dirs.split(os.pathsep)
 
     def run(self):
@@ -204,7 +204,7 @@ class config(Command):
         self._check_compiler()
         (src, out) = self._preprocess(body, headers, include_dirs, lang)
 
-        if isinstance(pattern, basestring):
+        if isinstance(pattern, str):
             pattern = re.compile(pattern)
 
         file = open(out)

Lib/distutils/command/install.py

@@ -449,7 +449,7 @@ class install (Command):
             self.extra_path = self.distribution.extra_path
 
         if self.extra_path is not None:
-            if isinstance(self.extra_path, basestring):
+            if isinstance(self.extra_path, str):
                 self.extra_path = self.extra_path.split(',')
 
             if len(self.extra_path) == 1:

Lib/distutils/command/install_data.py

@@ -45,7 +45,7 @@ class install_data(Command):
     def run(self):
         self.mkpath(self.install_dir)
         for f in self.data_files:
-            if isinstance(f, basestring):
+            if isinstance(f, str):
                 # it's a simple file, so copy it
                 f = convert_path(f)
                 if self.warn_dir:

Lib/distutils/dir_util.py

@@ -28,7 +28,7 @@ def mkpath (name, mode=0o777, verbose=0, dry_run=0):
     global _path_created
 
     # Detect a common bug -- name is None
-    if not isinstance(name, basestring):
+    if not isinstance(name, str):
         raise DistutilsInternalError(
               "mkpath: 'name' must be a string (got %r)" % (name,))
 

Lib/distutils/dist.py

@@ -580,13 +580,13 @@ Common commands: (see '--help-commands' for more)
 
         keywords = self.metadata.keywords
         if keywords is not None:
-            if isinstance(keywords, basestring):
+            if isinstance(keywords, str):
                 keywordlist = keywords.split(',')
                 self.metadata.keywords = [x.strip() for x in keywordlist]
 
         platforms = self.metadata.platforms
         if platforms is not None:
-            if isinstance(platforms, basestring):
+            if isinstance(platforms, str):
                 platformlist = platforms.split(',')
                 self.metadata.platforms = [x.strip() for x in platformlist]
 
@@ -874,7 +874,7 @@ Common commands: (see '--help-commands' for more)
                 neg_opt = {}
 
             try:
-                is_string = isinstance(value, basestring)
+                is_string = isinstance(value, str)
                 if option in neg_opt and is_string:
                     setattr(command_obj, neg_opt[option], not strtobool(value))
                 elif option in bool_opts and is_string: