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| '''Important''': One should note that this can cause various problems due to different python build options. Currently the script below does not work on OSX since Apple's python is compiled with ucs2 while Sage's Python is compiled with ucs4. If you encounter any bug or problem please state clearly that you are using the system's python since that configuration might contribute to the problem. The Sage people will attempt to reproduce the problem with vanilla Sage, but because there are a large number of distributions out there we cannot debug problems where we might not have access, so if you break Sage that way you get to keep the pieces ;-) |
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| Create this `s.py` python script: | |
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| Create this `s.py` python script: | |
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| #!python | |
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| import re | |
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| "SAGE_SERVER": "http://www.sagemath.org/", | |
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| def import_sageall(): """ Imports sage by "import sage.all". If it fails, write a helpful message and exit. After executing this method, you can be sure that sage just works, e.g you can do from sage.all import something without worrying. """ try: import sage.all except ImportError, e: if re.match("(.*).so: cannot open shared object file: No such file or directory", e.message): # all seems to be just a LD_LIBRARY_PATH problem in 99% of cases print """\ "import sage.all" failed when importing an .so library, this is most probably an LD_LIBRARY_PATH problem, please set your LD_LIBRARY_PATH and try again, e.g. execute: LD_LIBRARY_PATH=%s/local/lib python %s""" % (os.environ.get("SAGE_ROOT", ""), sys.argv[0]) sys.exit() else: # some other problem raise |
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| import_sageall() | |
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| print x**2/3-log(x) | e = x**2/3-log(x) print e print integrate(e, x) |
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| and run it like this: | and try to run it: |
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| $ LD_LIBRARY_PATH="/home/ondra/ext/sage/local/lib" python s.py Falling back to a hard coded sage server in misc/hg.py |
$ python s.py "import sage.all" failed when importing an .so library, this is most probably an LD_LIBRARY_PATH problem, please set your LD_LIBRARY_PATH and try again, e.g. execute: LD_LIBRARY_PATH=/home/ondra/ext/sage/local/lib python s.py }}} it tells you the exact command that you need to execute to make it work, so do it: |
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| {{{ $ LD_LIBRARY_PATH=/home/ondra/ext/sage/local/lib python s.py |
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| 3 x - x log(x) + -- + x 9 |
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| So as you can see from the above, all you have to do is to set the `root` keyword parameter in the script to point to your Sage installation and that's it. The script will tell you the correct command to run itself. | |
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| Create the `run_sage` bash script: | |
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| Create the `run_sage` bash script: | |
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| $ ./run_sage Python 2.5.1 (r251:54863, Mar 29 2008, 09:29:46) |
$ ./run_sage Python 2.5.1 (r251:54863, Mar 29 2008, 09:29:46) |
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In [2]: var("x") |
In [2]: var("x") |
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In [3]: x**2/4 + log(x) |
In [3]: x**2/4 + log(x) |
How to run Sage in a systemwide Python
Important: One should note that this can cause various problems due to different python build options. Currently the script below does not work on OSX since Apple's python is compiled with ucs2 while Sage's Python is compiled with ucs4. If you encounter any bug or problem please state clearly that you are using the system's python since that configuration might contribute to the problem. The Sage people will attempt to reproduce the problem with vanilla Sage, but because there are a large number of distributions out there we cannot debug problems where we might not have access, so if you break Sage that way you get to keep the pieces 
Easy Way
Create this s.py python script:
1 import os
2 import re
3 import sys
4 def set_paths(root="/home/ondra/ext/sage"):
5 """
6 Set paths necessary to import sage.
7 root ... the path to your Sage installation
8 """
9 python_path = [
10 root+"/local/lib/python",
11 root+"/local/lib/python2.5/lib-dynload",
12 root+"/local/lib/python2.5/site-packages",
13 ]
14 sys.path = python_path + sys.path
15 paths = {
16 "SAGE_ROOT": root,
17 "SAGE_LOCAL": root+"/local",
18 "DOT_SAGE": "~/.sage/",
19 "SAGE_SERVER": "http://www.sagemath.org/",
20 "PATH": root+"/local/bin:"+os.environ["PATH"],
21 }
22 os.environ.update(paths)
23 def import_sageall():
24 """
25 Imports sage by "import sage.all".
26 If it fails, write a helpful message and exit. After executing this method,
27 you can be sure that sage just works, e.g you can do
28 from sage.all import something
29 without worrying.
30 """
31 try:
32 import sage.all
33 except ImportError, e:
34 if re.match("(.*).so: cannot open shared object file: No such file or directory", e.message):
35 # all seems to be just a LD_LIBRARY_PATH problem in 99% of cases
36 print """\
37 "import sage.all" failed when importing an .so library, this is most probably
38 an LD_LIBRARY_PATH problem, please set your LD_LIBRARY_PATH and try again, e.g. execute:
39 LD_LIBRARY_PATH=%s/local/lib python %s""" % (os.environ.get("SAGE_ROOT", ""),
40 sys.argv[0])
41 sys.exit()
42 else:
43 # some other problem
44 raise
45 set_paths()
46 import_sageall()
47 from sage.all import *
48 var("x")
49 e = x**2/3-log(x)
50 print e
51 print integrate(e, x)
and try to run it:
$ python s.py "import sage.all" failed when importing an .so library, this is most probably an LD_LIBRARY_PATH problem, please set your LD_LIBRARY_PATH and try again, e.g. execute: LD_LIBRARY_PATH=/home/ondra/ext/sage/local/lib python s.py
it tells you the exact command that you need to execute to make it work, so do it:
$ LD_LIBRARY_PATH=/home/ondra/ext/sage/local/lib python s.py
2
x
-- - log(x)
3
3
x
- x log(x) + -- + x
9So as you can see from the above, all you have to do is to set the root keyword parameter in the script to point to your Sage installation and that's it. The script will tell you the correct command to run itself.
Robust Way
Create the run_sage bash script:
export SAGE_ROOT=/home/ondra/ext/sage export SAGE_LOCAL=$SAGE_ROOT/local export DOT_SAGE=~/.sage/ export PATH=$SAGE_ROOT/local/bin:$PATH export LD_LIBRARY_PATH="$SAGE_ROOT/local/lib/openmpi:$SAGE_ROOT/local/lib/:" export PYTHONPATH="$SAGE_ROOT/local/bin:$SAGE_ROOT/local/lib/python2.5/site-packages/setuptools-0.6c8-py2.5.egg:$SAGE_ROOT/local/lib/python2.5/site-packages/SQLAlchemy-0.4.3-py2.5.egg:$SAGE_ROOT/local/bin:$SAGE_ROOT/local/lib/python:$SAGE_ROOT/local/lib/python25.zip:$SAGE_ROOT/local/lib/python2.5/plat-linux2:$SAGE_ROOT/local/lib/python2.5/lib-tk:$SAGE_ROOT/local/lib/python2.5/lib-dynload:$SAGE_ROOT/local/lib/python2.5/site-packages:$SAGE_ROOT/local/lib/python2.5/site-packages/IPython/Extensions" ipython
Then:
$ ./run_sage
Python 2.5.1 (r251:54863, Mar 29 2008, 09:29:46)
Type "copyright", "credits" or "license" for more information.
IPython 0.8.1 -- An enhanced Interactive Python.
? -> Introduction to IPython's features.
%magic -> Information about IPython's 'magic' % functions.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.
In [1]: from sage.all import *
Falling back to a hard coded sage server in misc/hg.py
In [2]: var("x")
Out[2]: x
In [3]: x**2/4 + log(x)
Out[3]: log(x) + x^2/4