numpy.core.records.fromfile — NumPy v1.13 Manual (original) (raw)

numpy.core.records. fromfile(fd, dtype=None, shape=None, offset=0, formats=None, names=None, titles=None, aligned=False, byteorder=None)[source]¶

Create an array from binary file data

If file is a string then that file is opened, else it is assumed to be a file object. The file object must support random access (i.e. it must have tell and seek methods).

from tempfile import TemporaryFile a = np.empty(10,dtype='f8,i4,a5') a[5] = (0.5,10,'abcde')

fd=TemporaryFile() a = a.newbyteorder('<') a.tofile(fd)

fd.seek(0) r=np.core.records.fromfile(fd, formats='f8,i4,a5', shape=10, ... byteorder='<') print(r[5]) (0.5, 10, 'abcde') r.shape (10,)