Question

您好我是python的新手，我有一个文本文件.txt，结构如下：

Text1     31332.22342
Text2     293023.32323
Text3     32332.32323

将这些数字放入数组的最简单方法是什么？干杯！

Answer 1

您可以读取文件并将其拆分为一个列表，然后遍历列表并尝试转换为浮点数，如果成功则将其添加到浮点列表中。如下：

    with open('file.txt', 'r') as f:
        data = f.read().split()
        floats = []
        for elem in data:
            try:
                floats.append(float(elem))
            except ValueError:
                pass
        print floats

输出：

[31332.22342, 293023.32323, 32332.32323]

Answer 2

您还可以使用numpy genfromtxt功能。像这样的东西：

<强> text_file.txt

Text1     31332.22342
Text2     293023.32323
Text3     32332.32323

python shell

>>> import numpy as np
>>> numbers = np.genfromtxt('text_file.txt', usecols=1 )

输出

[  31332.22342  293023.32323   32332.32323]

Answer 3

要获得数据类型的属性验证，请尝试以下操作：

horseman
        .open(url + '' + page)
        .html('article')
        .then((htmlRes) => {
          if(htmlRes){
            var item = {}; //container for one article info
            //Loading data in cheerio to parse it
            var $ = cheerio.load(htmlRes);
            //First step : get the title
            $('h4[class=company-name]').each(function(i, elem) {
              //Delete the span jobs
              //Delete the number of jobs
              var t = $(this).text().replace(/\s+/g, '').replace(/\d+/g, '');
              //Delete the word jobs
              var tRes = t.substr(0, t.length-4);
              item.company = tRes;
            });
            var stacksF = []; //container for the list of different stacks categories
            $('div[class=company-stack-category]').each(function(i, elem) {
              var obj = {}; //one stack categorie
              var stacks = []; //list of item in the aimed stack
              obj.stackName = $(this).children('.category-title').text(); //name of the stakc
              $(this).children('.company-stack-list').children('.stack-item').each(function(c, elem) {
                stacks[c] = $(this).text(); //one stack element
              });
              var stacksRes = stacks.join(', '); //join all the stack element in a unique string
              stacksRes = stacksRes.replace(/\s+/g, '');
              obj.stackValue = stacksRes;
              stacksF.push(obj);
            });
            item.stacks = stacksF;
            articles.push(item);
          }else{
            console.log("Impossible to retrieve data");
          }
        })
        .close();

<强>输出：

import numpy as np
data = np.genfromtxt("test.txt", usecols=1, dtype=float)

如何在python中从文本文件中获取浮点数？

3 个答案: