如何显示不带引号且以逗号作为分隔符的 NumPy 字符串数组？

Question

I am trying to generate an array out of a file with numpy.genfromtxt .

File is like:

16.37.235.200|59009|514|16.37.235.153|
17.37.235.200|59009|514|18.37.235.153|

And I get an array like:

['16.37.235.200' '17.37.235.200']

But I want the array to be like that:

[16.37.235.200,17.37.235.200]

Answer 1

Here is your original array:

x = np.array(['16.37.235.200', '17.37.235.200'])

which is displayed like this when printed:

print(x)
>>> ['16.37.235.200' '17.37.235.200']

In order to display it with comma as a delimiter and without quotes around strings we can use np.array2string :

print(np.array2string(x, separator=',', formatter={'str_kind': lambda x: x}))
>>> [16.37.235.200,17.37.235.200]

I don't like that lambda x: x formatter but couldn't come up with something better to remove the quotes.

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You can find more here: How to pretty-printing a numpy.array without scientific notation and with given precision?