Python bugs

Skip Montanaro skip at mojam.com
Mon Nov 29 21:59:01 CET 1999


    Python 1.5.2 (#0, Apr 13 1999, 10:51:12) [MSC 32 bit (Intel)] on win32
    Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
    >>> import os
    >>> {}.update(os.environ)
    Traceback (innermost last):
      File "<stdin>", line 1, in ?
    TypeError: dictionary, instance
    >>> import shelve
    >>> s = shelve.open('foo')
    >>> s.get('bar', 'baz')
    Traceback (innermost last):
      File "<stdin>", line 1, in ?
    AttributeError: get
    >>> 

I believe os.environ is a class to allow constructs like

    os.environ["FOO"] = "PYTHON"

to work like

    os.putenv("FOO", "PYTHON")

with regard to setting or changing the values of environment variables.

The lack of a get attribute in shelve objects seems to have been rectified
since the 1.5.2 release:

    >>> db = shelve.BsdDbShelf (bsddb.btopen("/var/tmp/foo2", "c"))
    >>> db["1"] = 1
    >>> db.keys()
    ['1']
    >>> db.get("1", 0)
    1
    >>> db.get("2", 0)
    0                        

Skip Montanaro | http://www.mojam.com/
skip at mojam.com | http://www.musi-cal.com/
847-971-7098   | Python: Programming the way Guido indented...





More information about the Python-list mailing list