Index: Doc/library/imaplib.rst
===================================================================
--- Doc/library/imaplib.rst	(révision 66888)
+++ Doc/library/imaplib.rst	(copie de travail)
@@ -75,7 +75,7 @@
 
    This is a subclass derived from :class:`IMAP4` that connects to the
    ``stdin/stdout`` file descriptors created by passing *command* to
-   ``os.popen2()``.
+   ``subprocess.Popen()``.
 
 
 The following utility functions are defined:
Index: Lib/imaplib.py
===================================================================
--- Lib/imaplib.py	(révision 66888)
+++ Lib/imaplib.py	(copie de travail)
@@ -22,7 +22,7 @@
 
 __version__ = "2.58"
 
-import binascii, os, random, re, socket, sys, time
+import binascii, io, random, re, socket, subprocess, sys, time
 
 __all__ = ["IMAP4", "IMAP4_stream", "Internaldate2tuple",
            "Int2AP", "ParseFlags", "Time2Internaldate"]
@@ -147,6 +147,7 @@
     class abort(error): pass        # Service errors - close and retry
     class readonly(abort): pass     # Mailbox status changed to READ-ONLY
 
+    encoding = "UTF-8"
     mustquote = re.compile(r"[^\w!#$%&'*+,.:;<=>?^`|~-]", re.ASCII)
 
     def __init__(self, host = '', port = IMAP4_PORT):
@@ -1214,7 +1215,7 @@
 
     Instantiate with: IMAP4_stream(command)
 
-            where "command" is a string that can be passed to os.popen2()
+            where "command" is a string that can be passed to subprocess.Popen()
 
     for more documentation see the docstring of the parent class IMAP4.
     """
@@ -1234,8 +1235,11 @@
         self.port = None
         self.sock = None
         self.file = None
-        self.writefile, self.readfile = os.popen2(self.command)
-
+        self.process = subprocess.Popen(self.command,
+            stdin=subprocess.PIPE, stdout=subprocess.PIPE,
+            shell=True, close_fds=True)
+        self.writefile = io.TextIOWrapper(self.process.stdin, encoding=self.encoding)
+        self.readfile = io.TextIOWrapper(self.process.stdout, encoding=self.encoding)
 
     def read(self, size):
         """Read 'size' bytes from remote."""
@@ -1257,6 +1261,7 @@
         """Close I/O established in "open"."""
         self.readfile.close()
         self.writefile.close()
+        self.process.wait()