将NumPy个字符数组转换为字符串 [英] Turn NumPy Array of characters into a string

问题描述

我有一个numpy的字符数组，当我将其写入文件时，它写为:

I have a numpy array of characters and when I write it to file it writes as:

['K' 'R' 'K' 'P' 'T' 'T' 'K' 'T' 'K' 'R' 'G' 'L']

我希望它只写字母，不带括号或引号，即:

I want it to write with just the letters and without the brackets or quotations i.e. as:

KRKPTTKTKRGL 

我看过numpy文档，从我那里收集到的解决方案是一个chararray，但是它看起来不像普通数组那样有用.

I have looked at numpy documentation and from what I have gathered the solution is a chararray however it looks like this is not as functional as a normal array.

任何帮助都会很棒.谢谢！

Any help would be great. Thanks!

推荐答案

您可以将 numpy 的 tostring()方法用作:

>>> st = np.array(['K' 'R' 'K' 'P' 'T' 'T' 'K' 'T' 'K' 'R' 'G' 'L'])
>>> st.tostring()
'KRKPTTKTKRGL'

因为您有一个 numpy 数组，所以此方法将比 join()更快.

Since you have a numpy array, this method will be faster than join().

对于Python3x， tostring()可以用作:

For Python3x tostring() can be used as:

>>> st = np.array(['K','R','K','P','T','T','K','T','K','R','G','L'])
>>> st.astype('|S1').tostring().decode('utf-8')
'KRKPTTKTKRGL' 

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