about streamtoken

[Lin Armis]

hi all:
In java,there is streamtoken method to deal with input string.
how does the python do this work?
Supposed that input "aa/dd/as/23/a22",I wanna  the string "23" change to 
int('23'),but how can I tell the diffrent between '23'and 'aa' in the all 
strings?in java ,I can use streamtoken to recognize the number type and 
string type from input,but i dont know how is in Python.

cheers,

Mian

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