ó ¡¼™\c@ s6dZddlmZmZdefd„ƒYZdS(s Replacement rules. iÿÿÿÿ(tprint_functiontdivisiont TransformcB s;eZdZd„d„Zd„Zd„Zdd„ZRS(s¿ Immutable mapping that can be used as a generic transformation rule. Parameters ---------- transform : callable Computes the value corresponding to any key. filter : callable, optional If supplied, specifies which objects are in the mapping. Examples ======== >>> from sympy.core.rules import Transform >>> from sympy.abc import x This Transform will return, as a value, one more than the key: >>> add1 = Transform(lambda x: x + 1) >>> add1[1] 2 >>> add1[x] x + 1 By default, all values are considered to be in the dictionary. If a filter is supplied, only the objects for which it returns True are considered as being in the dictionary: >>> add1_odd = Transform(lambda x: x + 1, lambda x: x%2 == 1) >>> 2 in add1_odd False >>> add1_odd.get(2, 0) 0 >>> 3 in add1_odd True >>> add1_odd[3] 4 >>> add1_odd.get(3, 0) 4 cC stS(N(tTrue(tx((s/lib/python2.7/site-packages/sympy/core/rules.pyt2tcC s||_||_dS(N(t _transformt_filter(tselft transformtfilter((s/lib/python2.7/site-packages/sympy/core/rules.pyt__init__2s cC s |j|ƒS(N(R(R titem((s/lib/python2.7/site-packages/sympy/core/rules.pyt __contains__6scC s,|j|ƒr|j|ƒSt|ƒ‚dS(N(RRtKeyError(R tkey((s/lib/python2.7/site-packages/sympy/core/rules.pyt __getitem__9s cC s||kr||S|SdS(N((R R tdefault((s/lib/python2.7/site-packages/sympy/core/rules.pytget?s N(t__name__t __module__t__doc__R RRtNoneR(((s/lib/python2.7/site-packages/sympy/core/rules.pyRs (  N(Rt __future__RRtobjectR(((s/lib/python2.7/site-packages/sympy/core/rules.pyts