使用Python编辑csv文件时跳过标题 [英] Skip the headers when editing a csv file using Python

问题描述

我使用下面引用的代码来使用Python编辑csv。在代码中调用的函数形成代码的上部。

I am using below referred code to edit a csv using Python. Functions called in the code form upper part of the code.

问题：我想要下面引用的代码从第二行开始编辑csv，我想要排除包含标题的第一行。现在它只应用第一行的函数，我的标题行被改变。

Problem: I want the below referred code to start editing the csv from 2nd row, I want it to exclude 1st row which contains headers. Right now it is applying the functions on 1st row only and my header row is getting changed.

in_file = open("tmob_notcleaned.csv", "rb")
reader = csv.reader(in_file)
out_file = open("tmob_cleaned.csv", "wb")
writer = csv.writer(out_file)
row = 1
for row in reader:
    row[13] = handle_color(row[10])[1].replace(" - ","").strip()
    row[10] = handle_color(row[10])[0].replace("-","").replace("(","").replace(")","").strip()
    row[14] = handle_gb(row[10])[1].replace("-","").replace(" ","").replace("GB","").strip()
    row[10] = handle_gb(row[10])[0].strip()
    row[9] = handle_oem(row[10])[1].replace("Blackberry","RIM").replace("TMobile","T-Mobile").strip()
    row[15] = handle_addon(row[10])[1].strip()
    row[10] = handle_addon(row[10])[0].replace(" by","").replace("FREE","").strip()
    writer.writerow(row)
in_file.close()    
out_file.close()

这个问题通过将 row 变量初始化为 1 ，但是无效。

I tried to solve this problem by initializing row variable to 1 but it didn't work.

请帮助我解决此问题。

推荐答案

您的

为了让它在你的循环之前跳过一个项目，只需调用next(reader，None） ，并忽略返回值。

To make it skip one item before your loop, simply call next(reader, None) and ignore the return value.

你也可以简化你的代码;使用打开的文件作为上下文管理器让它们自动关闭：

You can also simplify your code a little; use the opened files as context managers to have them closed automatically:

with open("tmob_notcleaned.csv", "rb") as infile, open("tmob_cleaned.csv", "wb") as outfile:
   reader = csv.reader(infile)
   next(reader, None)  # skip the headers
   writer = csv.writer(outfile)
   for row in reader:
       # process each row
       writer.writerow(row)

# no need to close, the files are closed automatically when you get to this point.

如果要将头文件写入未处理的输出文件， next（）到 writer.writerow（）：

If you wanted to write the header to the output file unprocessed, that's easy too, pass the output of next() to writer.writerow():

headers = next(reader, None)  # returns the headers or `None` if the input is empty
if headers:
    writer.writerow(headers)

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