如何使用python和leveldb遍历所有键

Question

I want to use python's leveldb bindings to store data. I don't see in any of the docs how to iterate through all the keys without knowing them ahead of time. I see it is possible in the C bindings from this page: https://rawgit.com/google/leveldb/master/doc/index.html

leveldb::Iterator* it = db->NewIterator(leveldb::ReadOptions());
for (it->SeekToFirst(); it->Valid(); it->Next()) {
  cout << it->key().ToString() << ": "  << it->value().ToString() << endl;
}
assert(it->status().ok());  // Check for any errors found during the scan
delete it;

How can I do this from within python?

Answer 1

如果您使用Plyvel ，你可以简单地做for key, value in db:按该文档 。