如何使用现有词典填充工具架

Question

假设我有一个大的，100兆字节的字典，我想把它做成磁盘书架。我正在使用pypar来利用MPI生成主列表的清理位。最好的办法是什么？示例：

# much earlier
masterDict = shelve.open( 'aShelveFile' )
# .. . . . . 
# then we work out which parts of masterDict to keep
# and we put into aCleanDict
# then use mpi pypar to send the cleaned bits to the master rank
if pypar.rank() == 0:
  tempdict = {}
  for p in range(1,pypar.size()):
    tempdict.append(pypar.receive(p))
  for l1 in tempdict:
    for l2 in l1:
      realDict.append(l2)
  for p in range(1,pypar.size()):
    pypar.send(realDict,p)

  # now realDict has all the cleaned bits
  # which we send to the other hosts
else:
  pypar.send(aCleanDict, 0 )
  aCleanDict = pypar.receive( 0 )

# now to replace masterDict  with aCleanDict
# note: cannot send shelve dictonaries using pypar

# insert stackover flow code here.

Answer 1

在这里，您可以搁置一个简单的字典，并通过键myDict使其易于访问：

import shelve
myDict = {"a" : 1, "b" : 2}
myShelvedDict = shelve.open("my_shelved_dictionary.db")
myShelvedDict["myDict"] = myDict

请注意，字典的内容必须是可腌制的，如任何要搁置的东西。在

如果要复制shelve中字典的结构，即没有myDict键，而是将字典的键直接作为shelve的键，可以使用shelve的update方法：

^{pr2}$

shelve接口与dict接口有很大的重叠。在