ó Ħĵ™\c@ sİdZddlmZmZddlmZddlmZddlm Z ddl m Z m Z m Z mZmZmZmZmZde fd„ƒYZd „Zd S( sŞ This module implements the functionality to take any Python expression as a string and fix all numbers and other things before evaluating it, thus 1/2 returns Integer(1)/Integer(2) We use the Python ast module for that, which is in python2.6 and later. It is well documented at docs.python.org. Some tips to understand how this works: use dump() to get a nice representation of any node. Then write a string of what you want to get, e.g. "Integer(1)", parse it, dump it and you'll see that you need to do "Call(Name('Integer', Load()), [node], [], None, None)". You don't need to bother with lineno and col_offset, just call fix_missing_locations() before returning the node. i˙˙˙˙(tprint_functiontdivision(tBasic(texec_(t SympifyError(tparsetNodeTransformertCalltNametLoadtfix_missing_locationstStrtTuplet TransformcB s,eZd„Zd„Zd„Zd„ZRS(cC s#tj|ƒ||_||_dS(N(Rt__init__t local_dictt global_dict(tselfRR((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyR"s  cC s~t|jtƒr=tttdtƒƒ|ggddƒƒSt|jtƒrztttdtƒƒ|ggddƒƒS|S(NtIntegertFloat( t isinstancetntintR RRR tNonetfloat(Rtnode((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyt visit_Num'scC s§|j|jkr|S|j|jkr`|j|j}t|ttfƒsYt|ƒrs|Sn|jdkrs|Sttt dt ƒƒt |jƒggddƒƒS(NtTruetFalsetSymbol(RR( tidRRRRttypetcallableR RRR R R(RRtname_obj((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyt visit_Name0s!cC szg|jjD]}|j|ƒ^q }|j|jƒ}ttdtƒƒt|tƒƒ|ggddƒ}t|ƒS(NtLambda( targstvisittbodyRRR R RR (RRtargR$R&R((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyt visit_Lambda=s ($(t__name__t __module__RRR"R((((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyR s  cC s“i}td|ƒyt|jƒddƒ}Wn'tk rXtdt|ƒƒ‚nXt||ƒj|ƒ}t|ddƒ}t |||ƒS(s³ Converts the string "s" to a SymPy expression, in local_dict. It converts all numbers to Integers before feeding it to Python and automatically creates Symbols. sfrom sympy import *tmodetevalsCannot parse %s.s( RRtstript SyntaxErrorRtreprR R%tcompileR,(tsRRtate((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyt parse_exprDs  N(t__doc__t __future__RRtsympy.core.basicRtsympy.core.compatibilityRtsympy.core.sympifyRtastRRRRR R R R R R4(((s7lib/python2.7/site-packages/sympy/parsing/ast_parser.pyts:$