From e1ec477e83e88bbf3faccb6a1d00e26e82887164 Mon Sep 17 00:00:00 2001 From: Vivien Maisonneuve Date: Tue, 19 Aug 2014 14:43:03 +0200 Subject: [PATCH] Format comments in linexprs.py --- linpy/linexprs.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/linpy/linexprs.py b/linpy/linexprs.py index c100698..d2554a0 100644 --- a/linpy/linexprs.py +++ b/linpy/linexprs.py @@ -339,7 +339,7 @@ class LinExpr: Create an expression from a string. Raise SyntaxError if the string is not properly formatted. """ - # add implicit multiplication operators, e.g. '5x' -> '5*x' + # Add implicit multiplication operators, e.g. '5x' -> '5*x'. string = LinExpr._RE_NUM_VAR.sub(r'\1*\2', string) tree = ast.parse(string, 'eval') expr = cls._fromast(tree) @@ -416,7 +416,8 @@ class LinExpr: if symbol == sympy.S.One: constant = coefficient elif isinstance(symbol, sympy.Dummy): - # we cannot properly convert dummy symbols + # We cannot properly convert dummy symbols with respect to + # symbol equalities. raise TypeError('cannot convert dummy symbols') elif isinstance(symbol, sympy.Symbol): symbol = Symbol(symbol.name) @@ -477,6 +478,8 @@ class Symbol(LinExpr): @property def _coefficients(self): + # This is not implemented as an attribute, because __hash__ is not + # callable in __new__ in class Dummy. return {self: Fraction(1)} @property -- 2.20.1