Untitled

defaultdict and tuples
d = defaultdict((int,float))
for z in range( lots_and_lots):
  d['operation one'] += (1,5.67)
  ...
  ...
  d['operation two'] += (1,4.56)

for k,v in d.items():
  print k, 'Called', v[0], 'times, total =', v[1]

>>> x = (1,0)
>>> x+= (2,3)
>>> x
(1, 0, 2, 3)

>>> x = (1,0)
>>> x+= (2,3)
>>> x
(3,3)

d = defaultdict(list)
for z in range(lots_and_lots):
  d['operation one'].append(5.67)
  ...
  ...
  d['operation two'].append(4.56)
for k,v in d.items():
  print k, 'Called', len(v), 'times, total =', sum(v)

class Inc(object):
    def __init__(self):
        self.i = 0
        self.t = 0.0
    def __iadd__(self, f):
        self.i += 1
        self.t += f
        return self

d = defaultdict(Inc)
for z in range(lots_and_lots):
  d['operation one'] += 5.67
  ...
  ...
  d['operation two'] += 4.56
for k,v in d.items():
  print k, 'Called', v.i, 'times, total =', v.t

>>> from collections import Counter, defaultdict
>>> d = defaultdict(Counter)
>>> d['operation_one'].update(ival=1, fval=5.67)
>>> d['operation_two'].update(ival=1, fval=4.56)

d = defaultdict(lambda: (0, 0.0))

left, right = d["key"]
d["key"] = (left + 2, right + 3)

class vector(tuple):
    def __add__(self, other):
        return type(self)(l+r for l, r in zip(self, other))
    def __sub__(self, other):
        return type(self)(l-r for l, r in zip(self, other))
    def __radd__(self, other):
        return type(self)(l+r for l, r in zip(self, other))
    def __lsub__(self, other):
        return type(self)(r-l for l, r in zip(self, other))

from collections import defaultdict

d = defaultdict(lambda:vector((0, 0.0)))
for k in range(5):
    for j in range(5):
        d[k] += (j, j+k)

print d

a = (1,0)
b = (2,3)

res = tuple(sum(x) for x in zip(a,b)

d = defaultdict((int,float))
for z in range( lots_and_lots):
  d['operation one'] = tuple(sum(x) for x in zip(d['operation one'], (1,5.67))
  ...
  ...

class Tracker(object):
    def __init__(self):
        self.values = None
        self.count = 0

    def __iadd__(self, newvalues):
        self.count += 1
        if self.values is None:
            self.values = newvalues
        else:
            self.values = [(old + new) for old, new in zip(self.values, newvalues)]
        return self

    def __repr__(self):
        return '<Tracker(%s, %d)>' % (self.values, self.count)

for k,v in d.items():
    print k, 'Called', v.count, 'times, total =', v.values