# Python | Fast Walsh Hadamard Transform

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sympy.discrete.transforms.fwht (): can Walsh-Hadamard transform (WHT) . This method uses the order of the Hadamard sequence.
The sequence is automatically padded with zeros to the right, because the FXHT for radix-2 requires the number of sample points as a power of 2.

`  Parameters:  - & gt;  seq:  [iterable] sequence on which WHT is to be applied.  Returns:  Fast Walsh Hadamard Transform Transform `

Example # 1:

 ` # import sympy ` ` from ` ` sympy ` ` import ` ` fwht ` ` # sequence ` ` seq ` ` = ` ` [` ` 23 ` `, ` ` 56 ` `, ` ` 12 ` `, ` ` 555 ` `] ` ` # hwht ` ` transform ` ` = ` ` fwht (seq) ` ` print ` ` (` ` "Transform :" ` `, transform) `

Output:

` Transform: [646, -576, -488, 510] `

Example # 2:

 ` # import sympy ` ` from ` ` sympy ` ` import ` ` fwht ` ` # sequence ` ` seq ` ` = ` ` [` ` 15 ` `, ` ` 21 ` `, ` ` 13 ` `, ` ` 44 ` `] ` ` # hwht ` ` transform ` ` = ` ` fwht (seq) ` ` print ` ` (` ` "Transform :" ` `, transform) `

Output:

` Transform: [93, -37, -21, 25] `

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