python - how can I convert a char to variable? -

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in detail: need formula work. string = str(z)+":1.0 "+str(z+1)+":0.0" z variable value.

will able input formula dictionary value specific key. like

dicto={'a': 'str(z)+":1.0 "+str(z+1)+":0.0"'}

so when see key value 'a' should able use formula in dictionary

as read question, wanted this:

dicto = {'a': lambda x: "{0!s}:1.0 {1!s}:0.0".format(x, x + 1)} dicto['a'](2)   # '2:1.0 3:0.0'

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