Output JPG is not correct

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I downloaded the script and tested the example code line but the output file is not valid. I attached it. What is the problem?

File is like this: [255, 216, 255, 224, 0, 16, 74, 70, 73, 70, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0][255, 219, 0, 67, 0][16, 11, 10, 16, 24, 40, 51, 61, 12, 12, 14, 19, 26, 58, 60, 55, 14, 13, 16, 24, 40, 57, 69, 56, 14, 17, 22, 29, 51, 87, 80, 62, 18, 22, 37, 56, 68, 109, 103, 77, 24, 35, 55, 64, 81, 104, 113, 92, 49, 64, 78, 87, 103, 121, 120, 101, 72, 92, 95, 98, 112, 100, 103, 99][255, 219, 0, 67, 1][17, 18, 24, 47, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, 99, 99, 47, 66, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99][255, 192, 0, 17, 8][0, 16][0, 16][3, 1, 17, 0, 2, 17, 1, 3, 17, 1][255, 196, 1, 162, 0, 0, 0, 7, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 3, 2, 6, 1, 0, 7, 8, 9, 10, 11, 1, 0, 2, 2, 3, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16, 0, 2, 1, 3, 3, 2, 4, 2, 6, 7, 3, 4, 2, 6, 2, 115, 1, 2, 3, 17, 4, 0, 5, 33, 18, 49, 65, 81, 6, 19, 97, 34, 113, 129, 20, 50, 145, 161, 7, 21, 177, 66, 35, 193, 82, 209, 225, 51, 22, 98, 240, 36, 114, 130, 241, 37, 67, 52, 83, 146, 162, 178, 99, 115, 194, 53, 68, 39, 147, 163, 179, 54, 23, 84, 100, 116, 195, 210, 226, 8, 38, 131, 9, 10, 24, 25, 132, 148, 69, 70, 164, 180, 86, 211, 85, 40, 26, 242, 227, 243, 196, 212, 228, 244, 101, 117, 133, 149, 165, 181, 197, 213, 229, 245, 102, 118, 134, 150, 166, 182, 198, 214, 230, 246, 55, 71, 87, 103, 119, 135, 151, 167, 183, 199, 215, 231, 247, 56, 72, 88, 104, 120, 136, 152, 168, 184, 200, 216, 232, 248, 41, 57, 73, 89, 105, 121, 137, 153, 169, 185, 201, 217, 233, 249, 42, 58, 74, 90, 106, 122, 138, 154, 170, 186, 202, 218, 234, 250, 17, 0, 2, 2, 1, 2, 3, 5, 5, 4, 5, 6, 4, 8, 3, 3, 109, 1, 0, 2, 17, 3, 4, 33, 18, 49, 65, 5, 81, 19, 97, 34, 6, 113, 129, 145, 50, 161, 177, 240, 20, 193, 209, 225, 35, 66, 21, 82, 98, 114, 241, 51, 36, 52, 67, 130, 22, 146, 83, 37, 162, 99, 178, 194, 7, 115, 210, 53, 226, 68, 131, 23, 84, 147, 8, 9, 10, 24, 25, 38, 54, 69, 26, 39, 100, 116, 85, 55, 242, 163, 179, 195, 40, 41, 211, 227, 243, 132, 148, 164, 180, 196, 212, 228, 244, 101, 117, 133, 149, 165, 181, 197, 213, 229, 245, 70, 86, 102, 118, 134, 150, 166, 182, 198, 214, 230, 246, 71, 87, 103, 119, 135, 151, 167, 183, 199, 215, 231, 247, 56, 72, 88, 104, 120, 136, 152, 168, 184, 200, 216, 232, 248, 57, 73, 89, 105, 121, 137, 153, 169, 185, 201, 217, 233, 249, 42, 58, 74, 90, 106, 122, 138, 154, 170, 186, 202, 218, 234, 250][255, 218, 0, 12, 3, 1, 0, 2, 17, 3, 17, 0, 63, 0]["'"]['2']['\xc8']['\xcd']['#']['\x19']['\x1c']['\x99']['>']['\xd9']["'"]['\xed']['o'][']']['\xfc']['w']['\x15']['\xcc'][';']['z']['\xee']['\x11']['\xb0']['\xae']['M']['#']['\xb4']['n']['\xae']['\x8c']['U']['\x94']['\xd4']['0']['4'][' ']['\xf8']['\xe0']['R']['\x01']['\x14']['W']['\xab']['\xcd'][',']['\xac']['\x15']['\xa4']['y']['&']['4']['']['\t']['%']['\xc9']['5']['\xa1']['\xf1']['\xde']['\x9f']['N']['\x1d']['\xd0']['D']['b']['<']['\x87']['\xd8']['\xb1']['\x11']['\xa4']['u']['D']['R']['\xcc']['\xc6']['\x81']['@']['\xa9']["'"]['\xc3']['\x02']['I']['\x00']['Y']['\x7f'][255, 217]`