将 csv 转换为 txt（制表符分隔）并遍历目录 python 中的文件

Question

我有 ~1000 个带有 two-column 数组的文件，这些文件的行数各不相同，扩展名为 .csv。我需要读取文件的每一行，跳过第一个 header 行，然后将所有内容写入一个 tab-delimited .txt 文件。我试着自己在 python 中写这个。我要换numbers.csv

X,Y
1,2
3,4
...

进入

1[tab]2
3[tab]4
...

我的代码如下。

在 "next(csv_file)" 操作中，我的程序正在读取错误 "StopIteration" infile 的内容被删除。如果我从我的代码中删除这一行，我仍然 over-write in-file 但对 out-file.

什么也不做

有人可以帮我解决这个问题吗？ `

import csv
import os

cwd = os.getcwd()
#print(cwd)

for file in os.listdir():

    file_name, file_ext = os.path.splitext(file)

    if file_ext == '.csv':
        with open(file,'r') as csv_file:
            csv_reader = csv.reader(csv_file)

            next(csv_file)

            for line in csv_reader:

            with open(file, 'w') as new_txt:    #new file has .txt extension
                txt_writer = csv.writer(line, delimiter = '\t') #writefile
                txt_writer.writerow(line)   #write the lines to file`

Answer 1

In[2]: import csv
In[3]: with open('test_file.txt', 'r') as f:
  ...:     for line in f:
  ...:         print(line)
  ...: 
X,Y

1,2

3,4

In[4]: with open('test_file.txt', 'r') as f:
  ...:     reader = csv.DictReader(f)
  ...:     fieldnames = reader.fieldnames
  ...:     result = list(reader)
  ...: 
  ...: with open('test_output.tsv', 'w') as f:
  ...:     writer = csv.DictWriter(f, fieldnames=fieldnames, delimiter='\t')
  ...:     writer.writeheader()  # remove this line if you don't want header
  ...:     writer.writerows(result)
  ...: 
In[5]: with open('test_output.tsv', 'r') as f:
  ...:     for line in f:
  ...:         print(line)
  ...: 
X   Y

1   2

3   4

Answer 2

你走在正确的轨道上。我对您的代码做了一些更改：

import csv
import os

cwd = os.getcwd()
#print(cwd)

for file in os.listdir('.'):  # use the directory name here

    file_name, file_ext = os.path.splitext(file)

    if file_ext == '.csv':
        with open(file,'r') as csv_file:
            csv_reader = csv.reader(csv_file)

            csv_reader.next()  ## skip one line (the first one)

            newfile = file + '.txt'

            for line in csv_reader:
                with open(newfile, 'a') as new_txt:    #new file has .txt extn
                    txt_writer = csv.writer(new_txt, delimiter = '\t') #writefile
                    txt_writer.writerow(line)   #write the lines to file`

在写作中，您需要使用 'a'（附加）而不是 'w'（写入），否则，您只会得到一行 - 最后一行。而且，如果最后一行是空白行，那么您将拥有一个包含空白的文件，即什么都没有。

将 csv 转换为 txt（制表符分隔）并遍历目录 python 中的文件

converting csv to txt (tab delimited) and iterate over files in directory python

python

data-analysis

file-conversion