numpy.fromstring()

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

If not provided or, equivalently, the empty string, the data will be interpreted as binary data; otherwise, as ASCII text with decimal numbers. Also in this latter case, this argument is interpreted as the string separating numbers in the data; extra whitespace between elements is also ignored.

ValueError

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