Wand alpha() function in Python

The alpha() function is identical to the wand color() function. Similar to color() function, alpha() function draws a color on the image using current fill color, starting at specified position & method. Uses same arguments as color() method.

Syntax: wand.drawing.alpha(x, y, method) Parameters :

Parameter	Input Type	Description
x	numbers.Integer	start of filling color
y	numbers.Integer	end of filling color
method	basestring	method from PAINT_METHOD_TYPES

The following are the PAINT_METHOD_TYPES:

• 'point' alters a single pixel.
• 'replace' swaps on color for another. Threshold is influenced by fuzz.
• 'floodfill' fills area of a color influenced by fuzz.
• 'filltoborder' fills area of a color until border defined by border_color.
• 'reset' replaces the whole image to a single color.

Note: This method replaces matte() in ImageMagick version 7. An AttributeError will be raised if attempting to call on a library without DrawAlpha support. Example #1: 

Output: A pixel is visible at center of transparent image here is the zoomed image. 👁 Image
Example #2: Filling color using a flood-fill algorithm. 

Output: 👁 Image