преобразование: выделение памяти не удалось

    '''PYTHON3
            bash = "width=`identify -ping -format '%w' {}` ".format('design_adjusted.png')
            bash += "height=`identify -ping -format '%h' {}` ".format('design_adjusted.png')
            bash += "wx=$(($width-1)) hy=$(($height-1)) "
            bash += "coords='0,0 657,926  ${},0 1254,1067  ${},${} 1133,2051  0,${} 419,1803' ".format('wx','wx','hy','hy')
            bash += "width=`identify -ping -format '%w' {}` ".format('template_white.png') 
            bash += "height=`identify -ping -format '%h' {}` ".format('template_white.png')
            bash += "dims='${}x${}'  ".format('width','height')
            bash += 'convert \\ -size $dims xc:none \\  \\( {} -alpha set -virtual-pixel transparent '.format('design_adjusted.png')
            bash += '+distort Perspective "$coords" \\) \\-geometry +419+926 -compose Over -composite design_positioned.png'
            os.system(bash)
            if os.path.isfile("/home/rexweb/Desktop/project/design_positioned.png"):
                    return "<h1>SUCCESS</h1>"
            return '<h1>ERROR</h1>'

'' '