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Mailman_nameerror_global_name_dumperswitchboard_is_not_defined

20 Jul 2009

title: Mailman: NameError: global name 'DumperSwitchboard' is not defined date: Mon Jul 20 14:15:12 PDT 2009

I came across a problem today trying to recover a subscribers list from an old version of mailman, using a new-ish (2.1.9) version. I dug up the config.db file for the list, then ran dumpdb on it:

$ /usr/lib/mailman/bin/dumpdb -n config.db
Traceback (most recent call last):
  File "/usr/lib/mailman/bin/dumpdb", line 159, in ?
```
msg = main()
```

  File "/usr/lib/mailman/bin/dumpdb", line 126, in main
```
d = DumperSwitchboard().read(filename)
```

NameError: global name 'DumperSwitchboard' is not defined

After a bit of digging, I found this mailing list post that gave the solution:

--- bin/dumpdb  2007-06-18 08:35:57.000000000 -0700
+++ bin/dumpdb  2007-08-02 17:45:42.187500000 -0700
@@ -49,6 +49,7 @@
 import sys
 import getopt
 import pprint
+import marshal
 from cPickle import load
 from types import StringType

@@ -121,9 +122,7 @@
```
 # Handle dbs
 pp = pprint.PrettyPrinter(indent=4)
 if filetype == 1:
```

-        # BAW: this probably doesn't work if there are mixed types of .db
-        # files (i.e. some marshals, some bdbs).
-        d = DumperSwitchboard().read(filename)
+        d = marshal.load(open(filename))
```
     if doprint:
         pp.pprint(d)
     return d
```

I copied dumpdb to my home directory, patched it, then ran it like so:

PYTHONPATH=/usr/lib/mailman/bin/ ./dumpdb config.db

Bingo!

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