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[symfont] Use dict.__missing__ trick for memoize

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This commit is contained in:
Behdad Esfahbod 2017-02-20 14:30:12 -06:00
parent f13fbdae63
commit 087d865831
1 changed files with 7 additions and 9 deletions
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8
Snippets/symfont.py
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@ -117,20 +117,18 @@ class {name}(BasePen):
# ('momentYY', y*y)]) # ('momentYY', y*y)])
class BezierFuncs(object): class BezierFuncs(dict):
def __init__(self, symfunc): def __init__(self, symfunc):
self._symfunc = symfunc self._symfunc = symfunc
self._bezfuncs = {} self._bezfuncs = {}
def __getitem__(self, i): def __missing__(self, i):
if i not in self._bezfuncs:
args = [] args = []
for d in range(i+1): for d in range(i+1):
args.append('x%d' % d) args.append('x%d' % d)
args.append('y%d' % d) args.append('y%d' % d)
self._bezfuncs[i] = sp.lambdify(args, green(self._symfunc, BezierCurve[i])) return sp.lambdify(args, green(self._symfunc, BezierCurve[i]))
return self._bezfuncs[i]
def printCache(func, file=sys.stdout): def printCache(func, file=sys.stdout):
funcstr = str(func) funcstr = str(func)