numpy.lib.format.write_array#
- lib.format.write_array(fp, array, version=None, allow_pickle=True, pickle_kwargs=None)[source]#
Write an array to an NPY file, including a header.
If the array is neither C-contiguous nor Fortran-contiguous AND the file_like object is not a real file object, this function will have to copy data in memory.
- Parameters
- fpfile_like object
An open, writable file object, or similar object with a
.write()method.- arrayndarray
The array to write to disk.
- version(int, int) or None, optional
The version number of the format. None means use the oldest supported version that is able to store the data. Default: None
- allow_picklebool, optional
Whether to allow writing pickled data. Default: True
- pickle_kwargsdict, optional
Additional keyword arguments to pass to pickle.dump, excluding ‘protocol’. These are only useful when pickling objects in object arrays on Python 3 to Python 2 compatible format.
- Raises
- ValueError
If the array cannot be persisted. This includes the case of allow_pickle=False and array being an object array.
- Various other errors
If the array contains Python objects as part of its dtype, the process of pickling them may raise various errors if the objects are not picklable.