This is the symbol looked by python-mapnik:
_ZN6mapnik6filter19parse_image_filtersERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorINS_4util7variantIJNS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaEEEESaISP_EE
This is the closest symbol in /usr/lib/libmapnik.so.3.0:
_ZN6mapnik6filter19parse_image_filtersERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERSt6vectorINS_4util7variantIINS0_4blurENS0_4grayENS0_14agg_stack_blurENS0_6embossENS0_7sharpenENS0_11edge_detectENS0_5sobelENS0_10x_gradientENS0_10y_gradientENS0_6invertENS0_10scale_hslaENS0_14colorize_alphaENS0_14color_to_alphaENS0_21color_blind_protanopeENS0_23color_blind_deuteranopeENS0_21color_blind_tritanopeEEEESaISS_EE
Looks like color_blind_* are missing, probably not compiled with the right version?
This is the symbol looked by python-mapnik: er19parse_ image_filtersER KNSt7__ cxx1112basic_ stringIcSt11cha r_traitsIcESaIc EEERSt6vectorIN S_4util7variant IJNS0_4blurENS0 _4grayENS0_ 14agg_stack_ blurENS0_ 6embossENS0_ 7sharpenENS0_ 11edge_ detectENS0_ 5sobelENS0_ 10x_gradientENS 0_10y_gradientE NS0_6invertENS0 _10scale_ hslaENS0_ 14colorize_ alphaENS0_ 14color_ to_alphaEEEESaI SP_EE
_ZN6mapnik6filt
This is the closest symbol in /usr/lib/ libmapnik. so.3.0: er19parse_ image_filtersER KNSt7__ cxx1112basic_ stringIcSt11cha r_traitsIcESaIc EEERSt6vectorIN S_4util7variant IINS0_4blurENS0 _4grayENS0_ 14agg_stack_ blurENS0_ 6embossENS0_ 7sharpenENS0_ 11edge_ detectENS0_ 5sobelENS0_ 10x_gradientENS 0_10y_gradientE NS0_6invertENS0 _10scale_ hslaENS0_ 14colorize_ alphaENS0_ 14color_ to_alphaENS0_ 21color_ blind_protanope ENS0_23color_ blind_deuterano peENS0_ 21color_ blind_tritanope EEEESaISS_ EE
_ZN6mapnik6filt
Looks like color_blind_* are missing, probably not compiled with the right version?