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MapReduce编程模型:
- Map:映射过程
- Reduce:合并过程
import operator
from functools import reduce
# 需要处理的数据
lst = [
"Tom",
"Jack",
"Mimi",
"Jiji",
"GoodMan"
]
# map过程:对每个数据进行处理,映射为字符串长度
lst = map(len, lst)
print(lst) # <map object at 0x101b43c18>
# reduce过程:对所有map处理过的数据进行汇总
result = reduce(operator.add, lst)
print(result) # 22