why does the following error occur?
def quit_time():
data_file = shelve.open("data.dat", "c")
data_file["quit_time"] = datetime.datetime.today()
print data_file["quit_time"]
raw_input("enter")
Traceback (most recent call last):
File "D:\a\TEXT\Py\going_over\going_over.py", line 192, in -toplevel-
main()
File "D:\a\TEXT\Py\going_over\going_over.py", line 190, in main
quit_time()
File "D:\a\TEXT\Py\going_over\going_over.py", line 156, in quit_time
data_file = shelve.open("data.dat", "c")
File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\shelve.py", line 231, in
open
return DbfilenameShelf(filename, flag, protocol, writeback, binary)
File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\shelve.py", line 212, in
__init__
Shelf.__init__(self, anydbm.open(filename, flag), protocol,
writeback, binary)
File "D:\A\UTILITIES\PYTHON\PYTHON23J\lib\anydbm.py", line 80, in
open
raise error, "db type could not be determined"
error: db type could not be determined
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