Sage in console: newline characters?
 
  
 
  
 
 
 
 
 
 
    
        
        asked 11 years ago  
 
 Alasdair gravatar image  
 
 
 
 
 
I like to use sage in a linux console, rather than the notebook interface, simply for speed and convenience.  However, I have problems if I want to edit a multi-line statement.  For example, suppose I enter:
 
for i in range(10):
    if is_prime(i):
        print i
 
If I want to edit this, or maybe just run it again, when I call it up with the history mechanism, what I see is
 
for i in range(10):^J    if is prime(i):^J        print i
 
This can be very inconvenient if there are lots of short lines.  (I can get round this by running sage within GNU screen.)  I'm not quite sure how I encourage newlines to be interpreted as, well new lines rather than newline characters, and whether this is a sage, ipython, or console issue.
 
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Comments
You may want to try `%edit`, an ipython magic function which allows this kind of editing.
kcrisman gravatar imagekcrisman (
    
        11 years ago
    )
What is weird is that ipython 0.13.1 (not the one shipped sage, but same version) has the right behaviour.
tmonteil gravatar imagetmonteil (
    
        11 years ago
    )
What platform is this? I wonder if this is the bug reported at http://trac.sagemath.org/sage_trac/ticket/14405.
John Palmieri gravatar imageJohn Palmieri (
    
        11 years ago
    )
I'm using Sage 5.2 on Ubuntu 12.04.  I've not had this problem with previous versions of Sage.  It does seem to be the problem referred to above.  I have (for my distro) the most up-to-date versions of libncurses and libncurses-dev.
Alasdair gravatar imageAlasdair (
    
        11 years ago
    )
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