changeset:   93632:c8adee8a0ccb
parent:      93628:ce9881eecfb4
parent:      93631:c6182a7e75fa
user:        Serhiy Storchaka <storchaka@gmail.com>
date:        Fri Nov 28 00:11:07 2014 +0200
files:       Lib/pydoc.py Misc/NEWS
description:
Issue #22314: pydoc now works when the LINES environment variable is set.


diff -r ce9881eecfb4 -r c8adee8a0ccb Lib/pydoc.py
--- a/Lib/pydoc.py	Thu Nov 27 22:14:30 2014 +0200
+++ b/Lib/pydoc.py	Fri Nov 28 00:11:07 2014 +0200
@@ -1477,12 +1477,18 @@
         old = tty.tcgetattr(fd)
         tty.setcbreak(fd)
         getchar = lambda: sys.stdin.read(1)
-    except (ImportError, AttributeError):
+    except (ImportError, AttributeError, io.UnsupportedOperation):
         tty = None
         getchar = lambda: sys.stdin.readline()[:-1][:1]
 
     try:
-        r = inc = os.environ.get('LINES', 25) - 1
+        try:
+            h = int(os.environ.get('LINES', 0))
+        except ValueError:
+            h = 0
+        if h <= 1:
+            h = 25
+        r = inc = h - 1
         sys.stdout.write('\n'.join(lines[:inc]) + '\n')
         while lines[r:]:
             sys.stdout.write('-- more --')
diff -r ce9881eecfb4 -r c8adee8a0ccb Misc/NEWS
--- a/Misc/NEWS	Thu Nov 27 22:14:30 2014 +0200
+++ b/Misc/NEWS	Fri Nov 28 00:11:07 2014 +0200
@@ -383,6 +383,11 @@
 - Issue #17442: InteractiveInterpreter now displays the full chained traceback
   in its showtraceback method, to match the built in interactive interpreter.
 
+Tools/Demos
+-----------
+
+- Issue #22314: pydoc now works when the LINES environment variable is set.
+
 - Issue #10510: distutils register and upload methods now use HTML standards
   compliant CRLF line endings.