我可以重命名 numpy 记录数组中的字段吗

问题描述：

我是 Python 新手，所以这听起来可能很基础.我已经使用csv2rec导入了一个csv文件.第一行有标题.我想将标题更改为"x"，"y"，"z".这样做的最佳方法是什么?

I am new to python so this may sound very basic. I have imported a csv file using csv2rec. The first row has headers. I want to change the headers to 'x', 'y', 'z'. What's the best way of doing this?

>>> import matplotlib
>>> import matplotlib.mlab as mlab
>>> r= mlab.csv2rec('HeightWeight.csv', delimiter= ',')
>>> names= r.dtype.names
>>> for i in names:
     print i


index
heightinches
weightpounds

答

mlab.csv2rec 有一个 names 参数，你可以用它来设置列名:

mlab.csv2rec has a names parameter which you can use to set the column names:

r= mlab.csv2rec('HeightWeight.csv', delimiter= ',', 
                 names=['apple', 'pear'], 
                 skiprows=1)

当 names 不是 None 时，csv2rec 假定没有标题行.因此，使用 skiprows = 1 忽略标题行.

When names is not None, csv2rec assumes there is no header row. So use skiprows=1 to ignore the header row.

我可以重命名 numpy 记录数组中的字段吗

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