What is the meaning of 'cp3xm' and 'cp2xm' in the name of Python wheels?

Question

To my knowledge, the naming rules of python wheel is

package_version-related_python_version-none-32bits_or_64bits.whl

For example,

Answer 1

From PEP 3149 the m indicates pymalloc is in use as the memory allocator

The second component of the wheel name is the "abi" component. This was always none in wheels produced by older versions of wheel <26 as abi detection wasn't yet implemented.

In newer versions of wheel, the abi is populated. You need a sufficiently new version of pip in order to install these wheels.