sum_vs_rediuce.py

sum vs reduce.py

from functools import reduce

class string(str):
    def __ladd__(self, other):
        other = other or ""
        return reduce(str.__add__,("L" , self , "L+" , "R" , other))

    def __radd__(self, other):
        other = other or ""
        return reduce(str.__add__,("L" , self , "R+" , "R" , other))

    def __add__(self, other):
        other = other or ""
        return reduce(str.__add__,("L" , self , "+" , "R" , other))

    def __iadd__(self, other):
        other = other or ""
        return reduce(str.__add__,("L" , self , "i+" , "R" , other))

print(sum(map(lambda s:string(s),range(10))))
print(reduce(string.__add__,map(lambda s:string(s),range(10))))