mdsk.net
当前位置:首页 >> python 从txt中读取数据到 list 中 >>

python 从txt中读取数据到 list 中

list1,list2,list3.... 有多少行事先知道? a = open('myfile.txt')lines = a.readlines()lists = []#直接用一个数组存起来就好了for line in lines: lists.append(line.split())print(lists)

python3.x result=[] with open('a.txt','r') as f: for line in f: result.append(list(map(float,line.split(',')))) print(result) python2.7 result=[] with open('a.txt','r') as f: for line in f: result.append(map(float,line.split(',...

filename = r'a.txt'alist = []lines = open(filename,'r').readlines()alist = [line.strip().split(',')[3] for line in lines ]#字段以逗号分隔,这里取得是第4列

背景: 文件内容每一行是由N个单一数字组成的,每个数字之间由制表符区分,比如: 0 4 3 1 2 2 1 0 3 1 2 0 …… 现在需要将每一行数据存为一个list,然后所有行组成一个大的list。 工具: 1.strip():用于移除字符串头尾指定的字符,默认为空格,...

代码如下: #coding=utf-8content = []with open('test.txt', 'r') as f: for line in f.readlines(): content.append([line.strip('\n')]) print(content)运行结果:

#!/usr/bin/env python3.6import refname = 'a.txt'with open(fname) as f: s = f.read()numbers = [int(i) for i in re.findall(r'\d+', s)]print(f'numbers: {numbers}\nsum: {sum(numbers)}')

rs = [] for ln in file('a.txt','rt'): rs.extend(ln.strip().split(' '))

##文件中内容cat a.txt (('aa', 6L), [('n', '3CE'), ('c', '48'), ('c', 'ff')])(('bb', 5L), [('n', '4E5'), ('c', '28'), ('c', '2'), ('c', '8')])(('cc', 2L), [('n', '5DC'), ('c', '108'), ('c', '4'), ('c', '2'), ('c', '4')])#python...

so easy import rewith open('lists.txt') as f: s = f.read()alltogether = sum(int(i) for i in re.findall(r'\d+', s))

很多时候,我们将数据存在txt或者csv格式的文件里,最后再用Python读取出来,存到数组或者列表里,再做相应计算。本文首先介绍写入txt的方法,再根据不同的需求(存为数组还是list),介绍从txt读取浮点数的方法。 一、写入浮点数到txt文件: 假...

网站首页 | 网站地图
All rights reserved Powered by www.mdsk.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com