On both my own copy of sage (v 4.6) and on sagenb.org (v 4.8), executing
R = QQ['a']['x']
R('a')
returns 'a' as an element of R, but executing
R = QQ['a']['x,y']
R('a')
throws "TypeError: unable to convert string" (full traceback below). Is
this how it's supposed to work?
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_3.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n"
+
_support_.preparse_worksheet_cell(base64.b64decode("QSA9IFFRWydhJ10KQiA9IEFbJ3gseSddCkIoJ2EnKQ=="),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpRxt973/___code___.py", line 4, in <module>
exec compile(u"B('a')" + '\n', '', 'single')
File "", line 1, in <module>
File
"/sagenb/sage_install/sage-4.8-sage.math.washington.edu-x86_64-Linux/local/lib/python2.6/site-packages/sage/rings/polynomial/multi_polynomial_ring.py",
line 459, in __call__
raise TypeError, "unable to convert string"
TypeError: unable to convert string
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