numpy.fromstring

numpy.fromstring(string, dtype=float, count=-1, sep='')

A new 1-D array initialized from text data in a string.

Parameters:
string : str

A string containing the data.

dtype : data-type, optional

The data type of the array; default: float. For binary input data, the data must be in exactly this format.

count : int, optional

Read this number of dtype elements from the data. If this is negative (the default), the count will be determined from the length of the data.

sep : str, optional

The string separating numbers in the data; extra whitespace between elements is also ignored.

1.14 版后已移除: If this argument is not provided, fromstring falls back on the behaviour of frombuffer after encoding unicode string inputs as either utf-8 (python 3), or the default encoding (python 2).

Returns:
arr : ndarray

The constructed array.

Raises:
ValueError

If the string is not the correct size to satisfy the requested dtype and count.

Examples

>>> np.fromstring('1 2', dtype=int, sep=' ')
array([1, 2])
>>> np.fromstring('1, 2', dtype=int, sep=',')
array([1, 2])