Hi,
I was surprised by this - should I have been?
In [35]: e = np.array(['a'])
In [36]: e.shape
Out[36]: (1,)
In [37]: e.size
Out[37]: 1
In [38]: e.tostring()
Out[38]: 'a'
In [39]: f = np.array(['a'])
In [40]: f.shape == e.shape
Out[40]: True
In [41]: f.size == e.size
Out[41]: True
In [42]: f.tostring()
Out[42]: 'a'
In [43]: z = np.array(['\x00'])
In [44]: z.shape
Out[44]: (1,)
In [45]: z.size
Out[45]: 1
In [46]: z
Out[46]:
array([''],
dtype='|S1')
That is, an empty string array seems to be the same as a string array
with a single 0 byte, including having shape (1,) and size 1...
Best,
Matthew
