dbm.open(file, flag='r', mode=0o666)
Open the database file file and return a corresponding object.
If the database file already exists, the whichdb() function is used to determine its type and the appropriate module is used; if it does not exist, the first module listed above that can be imported is used.
The optional flag argument can be:
| Value | Meaning |
|---|---|
'r' | Open existing database for reading only (default) |
'w' | Open existing database for reading and writing |
'c' | Open database for reading and writing, creating it if it doesn’t exist |
'n' | Always create a new, empty database, open for reading and writing |
The optional mode argument is the Unix mode of the file, used only when the database has to be created. It defaults to octal 0o666 (and will be modified by the prevailing umask).
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