1 files changed, 25 insertions, 25 deletions
diff --git a/Lib/plat-mac/plistlib.py b/Lib/plat-mac/plistlib.py
index 709e8e15fa..f035729b76 100644
--- a/Lib/plat-mac/plistlib.py
+++ b/Lib/plat-mac/plistlib.py
@@ -12,8 +12,8 @@ To parse a plist from a file, use the readPlist(pathOrFile) function,
 with a file name or a (readable) file object as the only argument. It
 returns the top level object (again, usually a dictionary).
 
-To work with plist data in strings, you can use readPlistFromString()
-and writePlistToString().
+To work with plist data in bytes objects, you can use readPlistFromBytes()
+and writePlistToBytes().
 
 Values can be strings, integers, floats, booleans, tuples, lists,
 dictionaries, Data or datetime.datetime objects. String values (including
@@ -21,7 +21,7 @@ dictionary keys) may be unicode strings -- they will be written out as
 UTF-8.
 
 The <data> plist type is supported through the Data class. This is a
-thin wrapper around a Python string.
+thin wrapper around a Python bytes object.
 
 Generate Plist example:
 
@@ -36,8 +36,8 @@ Generate Plist example:
             aTrueValue=True,
             aFalseValue=False,
         ),
-        someData = Data("<binary gunk>"),
-        someMoreData = Data("<lots of binary gunk>" * 10),
+        someData = Data(b"<binary gunk>"),
+        someMoreData = Data(b"<lots of binary gunk>" * 10),
         aDate = datetime.datetime.fromtimestamp(time.mktime(time.gmtime())),
     )
     # unicode keys are possible, but a little awkward to use:
@@ -52,7 +52,7 @@ Parse Plist example:
 
 
 __all__ = [
-    "readPlist", "writePlist", "readPlistFromString", "writePlistToString",
+    "readPlist", "writePlist", "readPlistFromBytes", "writePlistToBytes",
     "readPlistFromResource", "writePlistToResource",
     "Plist", "Data", "Dict"
 ]
@@ -60,7 +60,7 @@ __all__ = [
 
 import binascii
 import datetime
-from cStringIO import StringIO
+from io import BytesIO
 import re
 
 
@@ -71,7 +71,7 @@ def readPlist(pathOrFile):
     """
     didOpen = 0
     if isinstance(pathOrFile, str):
-        pathOrFile = open(pathOrFile)
+        pathOrFile = open(pathOrFile, 'rb')
         didOpen = 1
     p = PlistParser()
     rootObject = p.parse(pathOrFile)
@@ -86,7 +86,7 @@ def writePlist(rootObject, pathOrFile):
     """
     didOpen = 0
     if isinstance(pathOrFile, str):
-        pathOrFile = open(pathOrFile, "w")
+        pathOrFile = open(pathOrFile, 'wb')
         didOpen = 1
     writer = PlistWriter(pathOrFile)
     writer.writeln("<plist version=\"1.0\">")
@@ -96,16 +96,16 @@ def writePlist(rootObject, pathOrFile):
         pathOrFile.close()
 
 
-def readPlistFromString(data):
-    """Read a plist data from a string. Return the root object.
+def readPlistFromBytes(data):
+    """Read a plist data from a bytes object. Return the root object.
     """
-    return readPlist(StringIO(data))
+    return readPlist(BytesIO(data))
 
 
-def writePlistToString(rootObject):
-    """Return 'rootObject' as a plist-formatted string.
+def writePlistToBytes(rootObject):
+    """Return 'rootObject' as a plist-formatted bytes object.
     """
-    f = StringIO()
+    f = BytesIO()
     writePlist(rootObject, f)
     return f.getvalue()
 
@@ -145,7 +145,6 @@ def writePlistToResource(rootObject, path, restype='plst', resid=0):
 
 
 class DumbXMLWriter:
-
     def __init__(self, file, indentLevel=0, indent="\t"):
         self.file = file
         self.stack = []
@@ -172,9 +171,12 @@ class DumbXMLWriter:
 
     def writeln(self, line):
         if line:
-            self.file.write(self.indentLevel * self.indent + line + "\n")
-        else:
-            self.file.write("\n")
+            # plist has fixed encoding of utf-8
+            if isinstance(line, str):
+                line = line.encode('utf-8')
+            self.file.write(self.indentLevel * self.indent)
+            self.file.write(line)
+        self.file.write('\n')
 
 
 # Contents should conform to a subset of ISO 8601
@@ -355,13 +357,15 @@ def _encodeBase64(s, maxlinelength=76):
     for i in range(0, len(s), maxbinsize):
         chunk = s[i : i + maxbinsize]
         pieces.append(binascii.b2a_base64(chunk))
-    return "".join(pieces)
+    return b''.join(pieces)
 
 class Data:
 
     """Wrapper for binary data."""
 
     def __init__(self, data):
+        if not isinstance(data, bytes):
+            raise TypeError("data must be as bytes")
         self.data = data
 
     def fromBase64(cls, data):
@@ -426,11 +430,7 @@ class PlistParser:
             self.stack[-1].append(value)
 
     def getData(self):
-        data = "".join(self.data)
-        try:
-            data = data.encode("ascii")
-        except UnicodeError:
-            pass
+        data = ''.join(self.data)
         self.data = []
         return data