Hello,
What should we do with variable names like 'or', 'and', ... This does
not break uniformly
The symbolic ring refuses the creation of such variable
{{{
sage: SR.var('and')
Traceback (most recent call last):
...
ValueError: The name "and" is not a valid Python identifier.
}}}
whereas polynomial rings silently fail
{{{
sage: R = PolynomialRing(QQ, ('and', 'or'))
sage: R.inject_variables()
Defining and, or
sage: and
...
SyntaxError: invalid syntax
sage: 'and' in globals()
True
}}}
Vincent
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