Update platform from CPython 3.11.5

CPython Developers · youknowone · commit 70ddf3c4f705 · 2023-09-01T00:36:56.000+09:00
diff --git a/Lib/platform.py b/Lib/platform.py
@@ -5,7 +5,7 @@
 
     If called from the command line, it prints the platform
     information concatenated as single string to stdout. The output
-    format is useable as part of a filename.
+    format is usable as part of a filename.
 
 """
 #    This module is maintained by Marc-Andre Lemburg <mal@egenix.com>.
@@ -116,7 +116,6 @@
 import os
 import re
 import sys
-import subprocess
 import functools
 import itertools
 
@@ -169,7 +168,7 @@ def libc_ver(executable=None, lib='', version='', chunksize=16384):
 
         Note that the function has intimate knowledge of how different
         libc versions add symbols to the executable and thus is probably
-        only useable for executables compiled using gcc.
+        only usable for executables compiled using gcc.
 
         The file is read and scanned in chunks of chunksize bytes.
 
@@ -187,12 +186,15 @@ def libc_ver(executable=None, lib='', version='', chunksize=16384):
 
         executable = sys.executable
 
+        if not executable:
+            # sys.executable is not set.
+            return lib, version
+
     V = _comparable_version
-    if hasattr(os.path, 'realpath'):
-        # Python 2.2 introduced os.path.realpath(); it is used
-        # here to work around problems with Cygwin not being
-        # able to open symlinks for reading
-        executable = os.path.realpath(executable)
+    # We use os.path.realpath()
+    # here to work around problems with Cygwin not being
+    # able to open symlinks for reading
+    executable = os.path.realpath(executable)
     with open(executable, 'rb') as f:
         binary = f.read(chunksize)
         pos = 0
@@ -283,6 +285,7 @@ def _syscmd_ver(system='', release='', version='',
                                            stdin=subprocess.DEVNULL,
                                            stderr=subprocess.DEVNULL,
                                            text=True,
+                                           encoding="locale",
                                            shell=True)
         except (OSError, subprocess.CalledProcessError) as why:
             #print('Command %s failed: %s' % (cmd, why))
@@ -609,7 +612,10 @@ def _syscmd_file(target, default=''):
         # XXX Others too ?
         return default
 
-    import subprocess
+    try:
+        import subprocess
+    except ImportError:
+        return default
     target = _follow_symlinks(target)
     # "file" output is locale dependent: force the usage of the C locale
     # to get deterministic behavior.
@@ -748,11 +754,16 @@ def from_subprocess():
         """
         Fall back to `uname -p`
         """
+        try:
+            import subprocess
+        except ImportError:
+            return None
         try:
             return subprocess.check_output(
                 ['uname', '-p'],
                 stderr=subprocess.DEVNULL,
                 text=True,
+                encoding="utf8",
             ).strip()
         except (OSError, subprocess.CalledProcessError):
             pass
@@ -776,6 +787,8 @@ class uname_result(
     except when needed.
     """
 
+    _fields = ('system', 'node', 'release', 'version', 'machine', 'processor')
+
     @functools.cached_property
     def processor(self):
         return _unknown_as_blank(_Processor.get())
@@ -789,7 +802,7 @@ def __iter__(self):
     @classmethod
     def _make(cls, iterable):
         # override factory to affect length check
-        num_fields = len(cls._fields)
+        num_fields = len(cls._fields) - 1
         result = cls.__new__(cls, *iterable)
         if len(result) != num_fields + 1:
             msg = f'Expected {num_fields} arguments, got {len(result)}'
@@ -803,7 +816,7 @@ def __len__(self):
         return len(tuple(iter(self)))
 
     def __reduce__(self):
-        return uname_result, tuple(self)[:len(self._fields)]
+        return uname_result, tuple(self)[:len(self._fields) - 1]
 
 
 _uname_cache = None
