mdw@git.distorted.org.uk Git - python-cdb/blob - Example

   1 #! /usr/bin/env python
   2
   3 # python-cdb 0.32 "Example"
   4
   5 import cdb
   6
   7 print cdb.__version__
   8
   9 ## cdbmake object
  10
  11 fn = "f.cdb"
  12
  13 maker = cdb.cdbmake(fn, fn + ".tmp");
  14
  15 maker.add('flim', 'flam')        # +4,4:flim->flam
  16 maker.add('map', 'hash')         # +3,4:map->hash
  17 maker.add('spam', 'eggs')        # +4,4:spam->eggs
  18 maker.add('map', 'dictionary')   # +3,10:map->dictionary
  19 maker.add('map', 'assoc. array') # +3,12:map->assoc. array
  20
  21 print "Added %d records to CDB %s (fd %d)" % \
  22       (maker.numentries, maker.fn, maker.fd)
  23
  24 maker.finish()
  25
  26 del(maker)
  27
  28 ## cdb object
  29
  30 c = cdb.init(fn)             # or init( file_obj.fileno() )
  31
  32 print len(c)                 # 5
  33
  34 print c['flim']              # 'flam'
  35 print c.get('spam')          # 'eggs'
  36 print c.get('map', 0)        # 'hash' -- a la cdbget utility
  37 print c.get('map', 1)        # 'dictionary'
  38
  39 r = c.get('map')             # will print:
  40 while r is not None:         #   'hash'
  41     print r                  #   'dictionary'
  42     r = c.getnext()          #   'assoc. array'
  43
  44 print c.keys()               # ['flim', 'map', 'spam']
  45
  46 for k in c.keys():           # flim => ['flam']
  47   print k, '=>', c.getall(k) # map => ['hash', 'dictionary', 'assoc. array']
  48                              # spam => ['eggs']
  49
  50 k = c.firstkey()             # same as above
  51 while k is not None:
  52     print k, "=>", c.getall(k)
  53     k = c.nextkey()
  54
  55
  56 def cdbdump(cdb_o):          # as the cdbdump utility
  57     r = cdb_o.each()         # r = ('key', 'val') or None
  58     while r:
  59         print "+%d,%d:%s->%s" % (
  60               len(r[0]), len(r[1]),
  61               r[0], r[1] )
  62         r = cdb_o.each()
  63     print
  64
  65
  66 cdbdump(c)