[python] How to convert signed to unsigned integer in python

Since version 3.2 :

def toSigned(n, byte_count): 
  return int.from_bytes(n.to_bytes(byte_count, 'little'), 'little', signed=True)

output :

In [8]: toSigned(5, 1)                                                                                                                                                                                                                                                                                                     
Out[8]: 5

In [9]: toSigned(0xff, 1)                                                                                                                                                                                                                                                                                                  
Out[9]: -1

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