from left to right, so as to reduce the sequence to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates (((1+2)+3)+4)+5). If initial is present, it is placed before the items of the sequence in the calculation, and serves as a default ...
Even multiplying numbers isn't a great example of reduce:>>> from functools import reduce >>> numbers = [2, 1, 3, 4, 7, 11, 18] >>> reduce(lambda x, y: x * y, numbers) 33264 When multiplying it's better to use the prod function in Python's math module (added in Python ...
Python is Python! [A1]关于reduce函数的參数及解释: reduce(function, iterable[, initializer]) Apply function of two argumentscumulatively to the items of iterable, from left to right, so as to reduce theiterable to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4,5...
from left to right, so as to reduce the sequence to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates (((1+2)+3)+4)+5). If initial is present, it is placed before the items of the sequence in the calculation, and serves as a default ...
Python---reduce原来是这样用的 官方解释: Applyfunctionof two arguments cumulatively to the items ofiterable, from left to right, so as to reduce the iterable to a single value. For example,reduce(lambda x, y: x+y, [1, 2, 3, 4, 5])calculates(((1+2)+3)+4)+5). The left argume...
Python---reduce原来是这样用的 官方解释: Applyfunctionof two arguments cumulatively to the items ofiterable, from left to right, so as to reduce the iterable to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates (((1+2)+3)+4)+5). The left...
reduce()函数的Python3.x API文档functools.reduce(function, iterable[, initializer]) Apply function of two arguments cumulatively to the items of sequence, from left to right, so as to reduce the sequence to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) ...
Apply function of two arguments cumulatively to the items of iterable, from left to right, so as to reduce the iterable to a single value. For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates (((1+2)+3)+4)+5). The left argument, x, is the accumulated value...
For example, reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates (((1+2)+3)+4)+5). If initial is present, it is placed before the items of the sequence in the calculation, and serves as a default when the sequence is empty."""将两个参数的函数累加应用于序列的项目,从...
Python MapReduce 代码: mapper.py#!/usr/bin/python import sys #Word Count Example # input comes from standard input STDIN for line in sys.stdin: line = line.strip() #remove leading and trailing whitespaces words = line.split() #split the line into words and returns as a list ...