Message1555
The built-in function eval() takes a string argument and a dictionary. The second argument should allow any instance which defines __getitem__ as opposed to just dictionaries.
The following example creates a type error:
eval, argument 2: expected dictionary, instance found
class SpreadSheet:
_cells = {}
def __setitem__( self, key, formula ):
self._cells[key] = formula
def __getitem__( self, key ):
return eval( self._cells[key], self )
ss = SpreadSheet()
ss['a1'] = '5'
ss['a2'] = 'a1*5'
ss['a2']
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Date |
User |
Action |
Args |
2007-08-23 13:50:45 | admin | link | issue215126 messages |
2007-08-23 13:50:45 | admin | create | |
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