Question

我正在尝试从.txt文件中读取值并将它们写入另一个.txt文件中，每行一个值，并且索引之间用逗号分隔。我陷入困境是因为当我在新文件中写入值时，我还用第一个值写入字符[，而最后一个写入字符\n]。我想念什么？如何只写值？问题出在第一个函数create_csv()

中

import matplotlib.pyplot as plt
import csv
x = []
y = []

def create_csv():
    index=0
    new_file = open("wv_00_csv.txt", "w+")
    with open('wv_00.txt','r') as f:
        data = f.readlines()
        data1=str(data)
        #new_file.writelines(str(type(data1)))
        #new_file.writelines(str(len(data1)))
        my_var = data1.split(",")
        #new_file.writelines(["%s\n" % item  for item in data1])
        #new_file.writelines(str(my_var))
        #new_file.writelines((my_var))
        #new_file.write("\n")
        for item in my_var:
            new_file.write(item +" , " +str(index))
            new_file.write("\n")
            index+=1
    new_file.close()

def plot():
    with open('wv_00_csv.txt','r') as csvfile:
       plots = csv.reader(csvfile, delimiter=',')
       for row in plots:
          x.append(float(row[1]))
          y.append(float(row[0]))
    plt.plot(x,y, label='Outputwaveform')
    plt.xlabel('x')
    plt.ylabel('y')
    plt.title('Waveformplot')
    plt.legend()
    plt.show()

create_csv()
#plot()

Here是有用的链接

Answer 1

基于您链接的文件，我没有看到任何'\ n'或'['，相反，您是通过将列表直接转换为字符串而得到的，字符串保留了所有内容。

将数据转换为字符串，然后立即将其连接并拆分可解决此问题。

def create_csv():
    index=0
    new_file = open("wv_00_csv.txt", "w+")
    with open('wv_00.txt','r') as f:
        data = f.readline()
        data_string = str(data)
        data_joined = ''.join(data_string)
        data_joined = data_joined.rstrip('\n')
        data_list = data_joined.split(',')
        for item in data_list:
            new_file.write(item + " " + str(index) + '\n')
            index+=1
    new_file.close()

读取值并将其写为逗号分隔的值python

1 个答案: