如何绕过字符串在文本文件中执行添加 [英] How to perform addition in text file bypassing strings

问题描述

我将 csv 文件转换为文本文件，我想在文本文件中添加数字.当我运行我的代码时出现错误.假设错误代码我想编写绕过我的字符串并添加数值的逻辑.

I converted my csv file to text file and I want to add the numbers inside the text file. When I run my code get an error. Assuming the error code I want to write logic that would bypass my strings and just add the numeric values.

`import csv 
csv_file = 'Annual Budget.csv'
txt_file = 'annual_budget.txt'
with open(txt_file, 'w') as my_output_file:
with open(csv_file, 'r') as my_input_file:
    reader = csv.reader(my_input_file)
    for row in reader:
        my_output_file.write(" ".join(row)+'
')

        data = []
with open(r'annual_budget.txt') as f:
for line in f:
    fields = line.split()
    rowdata = map(float, fields)
    data.extend(rowdata)
print(sum(data)/len(data)

输出(错误):data.extend(rowdata)ValueError:无法将字符串转换为浮点值:'ANNUAL'

这是我的文本文件的内容:

Here are the contents of my text file :

ANNUAL BUDGET Q2 Q4

100 450 20

600 765 50

500 380 79

800 480 455

1100 65 4320

推荐答案

修改你的代码如下:

  with open(r'annual_budget.txt', 'r') as f:
     reader = csv.reader(f)
     headers = reader.next() # this will yield first row i.e columns if python 3: Use next(reader) instead of reader.next()
     for line in reader:
         rowdata = map(float, line)
         data.extend(rowdata)
     print(sum(data)/len(data))

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