U L?hX@sHddlmZddlmZmZmZddlmZddZddZ dd Z d S) )rl)do_oneexhaustswitch)top_downcKs4|r(ttttjft|f|SddSdS)az Full simultaneous exact substitution. Examples ======== >>> from sympy.strategies.tools import subs >>> from sympy import Basic, S >>> mapping = {S(1): S(4), S(4): S(1), Basic(S(5)): Basic(S(6), S(7))} >>> expr = Basic(S(1), Basic(S(2), S(3)), Basic(S(4), Basic(S(5)))) >>> subs(mapping)(expr) Basic(4, Basic(2, 3), Basic(1, Basic(6, 7))) cSs|S)N)xrrH/var/www/html/venv/lib/python3.8/site-packages/sympy/strategies/tools.pyzsubs..N)rrmaprsubszipitems)dkwargsrrr r s $r cOstttt|f|S)z Strategy for canonicalization. Explanation =========== Apply each rule in a bottom_up fashion through the tree. Do each one in turn. Keep doing this until there is no change. )rrr)rulesrrrr canons rcCs tt|S)al Apply rules based on the expression type inputs: ruletypes -- a dict mapping {Type: rule} Examples ======== >>> from sympy.strategies import rm_id, typed >>> from sympy import Add, Mul >>> rm_zeros = rm_id(lambda x: x==0) >>> rm_ones = rm_id(lambda x: x==1) >>> remove_idents = typed({Add: rm_zeros, Mul: rm_ones}) )rtype)Z ruletypesrrr typed&srN) rcorerrrtraverserr rrrrrr s