cf.Field._del_quantization

Field._del_quantization(default=ValueError())[source]

Remove quantization metadata.

Quantization eliminates false precision, usually by rounding the least significant bits of floating-point mantissas to zeros, so that a subsequent compression on disk is more efficient.

Quantization metadata describes any existing quantization that has already been applied to the data. Removing the quantization metadata does not change the data in any way. If the data has in fact already been quantized, then it is up to the user to set new quantization metadata to describe this, with _set_quantization.

Added in version (cfdm): 1.12.2.0

See also

get_quantization, _set_quantization, del_quantize_on_write

Parameters:
default: optional

Return the value of the default keyword if there is no quantization metadata.

If set to an Exception instance then it will be raised instead.

Returns:
Quantization

The deleted quantization metadata.

Examples

>>> f.get_quantization()
<CF Quantization: algorithm=bitgroom, quantization_nsd=4>
>>> q = f._del_quantization()
>>> print(f.get_quantization(None))
None
>>> f._set_quantization(q)
>>> f.get_quantization(None)
<CF Quantization: algorithm=bitgroom, quantization_nsd=4>