Where can I find examples of bsddb in use?

Question

I've spent hours searching for examples of how to use the bsddb module and the only ones that I've found are these (from here):

data = mydb.get(key)
if data:
    doSomething(data)
#####################
rec = cursor.first()
while rec:
    print rec
    rec = cursor.next()
#####################
rec = mydb.set()
while rec:
    key, val = rec
    doSomething(key, val)
    rec = mydb.next()

Does anyone know where I could find more (practical) examples of how to use this package?

Or would anyone mind sharing code that they've written themselves that used it?

Edit:

The reason I chose the Berkeley DB was because of its scalability. I'm working on a latent semantic analysis of about 2.2 Million web pages. My simple testing of 14 web pages generates around 500,000 records. So doing the math out... there will be about 78.6 Billion records in my table.

If anyone knows of another efficient, scalable database model that I can use python to access, please let me know about it! (*lt_kije* has brought it to my attention that bsddb is depricated in Python 2.6 and will be gone in 3.*)

Answer 1

Searching for "import bsddb", I get:

• http://www.mnot.net/python/Cabinet.py
• http://www.java2s.com/Code/Python/Utility/Dumpadatabasefiletoapickle.htm

...but personally I'd heavily recommend you use sqlite instead of bsddb, people are using the former a lot more for a reason.

Answer 2

These days, most folks use the anydbm meta-module to interface with db-like databases. But the API is essentially dict-like; see PyMOTW for some examples. Note that bsddb is deprecated in 2.6.1 and will be gone in 3.x. Switching to anydbm will make the upgrade easier; switching to sqlite (which is now in stdlib) will give you a much more flexible store.

Answer 3

you may have a look in the sources of the pybsddb package there is several examples dbshelves among them, and dbtables