使用python 2.4计算CSV文件中的列数 [英] To Count the number of columns in a CSV file using python 2.4

问题描述

我想计算CSV文件中的总列数.目前，我正在使用python 2.7和3.4.代码在这些版本中运行完美，当我尝试在python 2.4中实现相同的功能时，它显示为next()未定义.

I want to count the total number of columns in a CSV file. Currently i am using python 2.7 and 3.4. Code works perfectly in these versions and when i try to implement the same thing in python 2.4, it is showing as next() is not defined.

我当前正在使用的代码(2.7和3.4)

Code i am using currently(2.7 and 3.4)

f = open(sys.argv[1],'r')

reader = csv.reader(f,delimiter=d)

num_cols = len(next(reader)) # Read first line and count columns

我的强烈需求是在 Python 2.4 中实现相同的功能.任何帮助将不胜感激.

My strong need is to implement the same in Python 2.4 . Any help would be greatly appreciated.

推荐答案

目前我尚未安装Python 2.4，因此我无法真正对其进行测试.

I do not have Python 2.4 installed at the moment, so I can not really test this.

根据文档，内置的 next是Python 2.6中的新增功能.但是，csv.reader拥有自己的 next方法，甚至在2.4中似乎也已经存在，所以您应该可以使用它.

According to the documentation, the next builtin is new in Python 2.6. However, the csv.reader has a next method of it's own, and that one seems to have existed even in 2.4, so you should be able to use this.

num_cols = len(reader.next())

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