From 635a136ec06c00efadc46a9d364f15d771f4036e Mon Sep 17 00:00:00 2001
From: Fedja Beader <fedja@protonmail.ch>
Date: Tue, 12 Dec 2023 21:25:02 +0100
Subject: Update for Python3

File "attoconf/help.py",
line 113, in detect_terminal_width
    fd = getattr(fd, 'fileno', lambda: -1)()
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
io.UnsupportedOperation: fileno
---
 attoconf/help.py | 27 ++++++++++-----------------
 1 file changed, 10 insertions(+), 17 deletions(-)

diff --git a/attoconf/help.py b/attoconf/help.py
index 777becb..a2379a6 100644
--- a/attoconf/help.py
+++ b/attoconf/help.py
@@ -109,23 +109,16 @@ class HelpSection(object):
 def detect_terminal_width(fd, DEFAULT_WIDTH=float('inf')):
     ''' Detect the width of a terminal.
     '''
-    if not isinstance(fd, int):
-        fd = getattr(fd, 'fileno', lambda: -1)()
-    if fd == -1:
-        return DEFAULT_WIDTH
-
-    import fcntl
-    import termios
-    try:
-        buf = fcntl.ioctl(fd, termios.TIOCGWINSZ, b'xx' * 4)
-    except IOError as e:
-        import errno
-        if e.errno != errno.ENOTTY:
-            raise
-        return DEFAULT_WIDTH
-    import struct
-    ws_row, ws_col, ws_xpixel, ws_ypixel = struct.unpack('HHHH', buf)
-    return ws_col
+    import os
+    import shutil
+
+    if isinstance(fd, int):
+        try:
+            return os.get_terminal_size(fd)
+        except OSError(...):
+            return DEFAULT_WIDTH
+    else:
+        return shutil.get_terminal_size(fallback=(DEFAULT_WIDTH, 24)).columns
 
 
 class Help(object):
-- 
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