float(bytesobject) treats the contents of the bytesobject as a sequence of ASCII characters, and converts those to a float value as if you used float(bytesobject.decode('ASCII')). The same support is extended to other objects implementing the buffer protocol.

The documentation, however, doesn't mention this:

> Return a floating point number constructed from a number or string x.

Everywhere else in the functions documentation, "string" refers to an object of type `str`. Please make it explicit that `bytes` is also acceptedable, like it does for the int() documentation.