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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getPagePixmap(doc, pno, matrix = None, colorspace = csRGB, clip = None, alpha = True):
 """Create pixmap of document page by page number. Notes: Convenience function calling page.getPixmap. Args: pno: (int) page number matrix: Matrix for transformation (default: Identity). colorspace: (str/Colorspace) rgb, rgb, gray - case ignored, default csRGB. clip: (irect-like) restrict rendering to this area. alpha: (bool) include alpha channel """

    return doc[pno].getPixmap(matrix = matrix, colorspace = colorspace,
                          clip = clip, alpha = alpha)