how to determine an 'open' string?

[holger krekel]

hello, 

with my replacement rlcompleter module i'd like to
have a *correct* check if a string is 'open'.
examples:

    asd"""askdjalsdk      # open 
    aksdjasd              # closed
    asjdkk"kajsd''''      # open
    "'asdasd"             # closed
    """dontcountoneven"   # open

so i need a function which takes these strings as
an argument and return 1 for 'open', 0 for a 'closed' string.

Any working ideas?

    holger