Russell Sim added the comment:
Hi,
I am having the same problem while running ipython in a batch mode emacs.
Apparently you can't even start ipython if the columns are less than 27, since
they use the argparse library for the magic method help printing and they
preformat the strings at import time. So importing the library fails. :(
I have a simple patch that fixes it but from what i can tell if you set the
columns to 10 or 1000 there is no effect on the output, so i wonder if it even
pays any attention to the width during rendering.
If you think it's of value I am happy to write tests. Or if someone has a
better implementation idea I'll be happy to implement it, but if you are on a
terminal that is getting <27 characters then you can't really expect the
formmating of the messages to be that readable.
--- cpython/Lib/argparse.py 2012-07-22 12:10:42.751869655 +1000
+++ /tmp/ediff3953qkY 2012-07-22 12:54:51.380700044 +1000
@@ -95,6 +95,7 @@
def _callable(obj):
return hasattr(obj, '__call__') or hasattr(obj, '__bases__')
+MIN_WIDTH = 10
SUPPRESS = '==SUPPRESS=='
@@ -486,7 +487,10 @@
# determine the required width and the entry label
help_position = min(self._action_max_length + 2,
self._max_help_position)
-help_width = self._width - help_position
+if self._width - help_position > MIN_WIDTH:
+help_width = self._width - help_position
+else:
+help_width = MIN_WIDTH
action_width = help_position - self._current_indent - 2
action_header = self._format_action_invocation(action)
--
nosy: +Russell.Sim
versions: +Python 2.7
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