how to execute *.sage files?

non-interactively

asked 2012-09-02 05:59:32 +0100

Anonymous

Hello,

Could anyone tell me how to execute *.sage files? I fail it as follows:


% sw_vers
ProductName:    Mac OS X
ProductVersion: 10.7.4
BuildVersion:   11E53 
$ hdiutil mount /Users/me/Downloads/sage-5.2-OSX-64bit-10.6-x86_64-Darwin.dmg
$ cp -R -P /Volumes/sage-5.2-OSX-64bit-10.6-x86_64-Darwin/sage /Applications
$ open /Applications/sage/sage
 :
 :
$ 
$ sage
----------------------------------------------------------------------
| Sage Version 5.2, Release Date: 2012-07-25                         |
| Type "notebook()" for the browser-based notebook interface.        |
| Type "help()" for help.                                            |
----------------------------------------------------------------------
sage: 1 + 1
2
sage: quit
Exiting Sage (CPU time 0m0.05s, Wall time 0m6.00s).
$ 
$ env | grep '/sage'
LD_LIBRARY_PATH=/Applications/sage/local/lib:
SAGE_ROOT=/Applications/sage
$ cat test.sage
1 + 1
$ sage test.sage
$ ls -d test.*
test.py     test.sage
$ cat test.py
# This file was *autogenerated* from the file test.sage.
from sage.all_cmdline import *   # import sage library
_sage_const_1 = Integer(1)
_sage_const_1  + _sage_const_1 
$ $SAGE_ROOT/local/bin/python test.py
Traceback (most recent call last):
  File "test.py", line 2, in <module>
    from sage.all_cmdline import *   # import sage library
  File "/Applications/sage/local/lib/python2.7/site-packages/sage/all_cmdline.py", line 14, in <module>
    from sage.all import *
  File "/Applications/sage/local/lib/python2.7/site-packages/sage/all.py", line 61, in <module>
    from sage.ext.c_lib import _init_csage, sig_on_count
ImportError: dlopen(/Applications/sage/local/lib/python2.7/site-packages/sage/ext/c_lib.so, 2): Library not loaded: libcsage.dylib
  Referenced from: /Applications/sage/local/lib/python2.7/site-packages/sage/ext/c_lib.so
  Reason: image not found
$

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answered 2012-09-02 07:03:45 +0100

Volker Braun
3301 ●11 ●30 ●75

This is correct:

$ sage test.sage

Note that if you run a Sage script, the output of each command is not printed like on the command line. This is a general convention and how Python works. Similarly, a shell script doesn't echo each line either. If you want text to appear on the output you have to add a manual print 1+1 command.

If you want to manually run the Python in Sage you can't directly call $ $SAGE_ROOT/local/bin/python. Some environment variables need to be set up first. Instead, use

sage -python test.py

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answered 2012-09-02 12:58:13 +0100

kd
11 ●2 ●2 ●3

Thank you for answer. I am now satisfied by another trial with a "print" command:


$ cat test2.sage
var('x')
assume(x > 0)
print bool(sqrt(x^2) == x)
$ sage test2.sage
True
$

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