CODEWITHSUNDEEP
pythonnumpy
Metal Slime
Metal Slime

Reputation: 149

What does datatype "S7" mean

Use the following command, the s.dtype will be 'S7', what does 'S7' means?

I have Googled, but only a Japanese website with failed link

I have read the Document in numpy, no luck

>>> strings = np.array([b'cat', b'dog', b'chicken', b'horse', b'goat'])
>>> s = strings[[0,1]]
>>> s.dtype
dtype('S7')

Thanks for your help

Upvotes: 1

Views: 1223

Answers (1)

Aditya Keshri
Aditya Keshri

Reputation: 61

The dtype object describes how the bytes in the fixed-size block of memory corresponding to an array item should be interpreted. It describes different aspects of the data such as:

  • Type of data
  • Size of the data
  • Byte order of the data etc.

Here, 'S7' means that the object is of type string and it's size(no. of bytes) is 7. You can confirm this by calling the 'itemsize' attribute for s.

>>>s.itemsize
7

Upvotes: 2

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