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class Progress: def __init__(self,n,i0=0): self._n=n self._i0=i0 self._i=i0 self._last="" def p(self,i): i0=self._i0 n=self._n assert i0<=i<n or n<i<=i0, (i0,i,n) percentage=Progress._p(i,n,i0) res="{0}%".format(percentage) if res!=self._last: print(res,end="\r") self._last=res def done(self): print("100%") @staticmethod def _p(i,n,i0): _1=1 if n>=i0 else -1 return 100*(i+_1-i0)//(n-i0)