sub:assertion {
  sub:LinguisticSystem a schema:ComputerLanguage ;
    rdfs:label "python" ;
    rdfs:seeAlso <https://www.wikidata.org/wiki/Q28865> ;
    owl:versionInfo "3.7.9.final.0" .
  sub:image a pplan:Variable ;
    rdfs:comment "None" ;
    rdfs:label "image" .
  sub:out1 a pplan:Variable ;
    rdfs:comment "None" ;
    rdfs:label "out1" .
  sub:ratio a pplan:Variable ;
    rdfs:comment "None" ;
    rdfs:label "ratio" .
  sub:step dc1:description """@is_fairstep(label='contrast image by factor')
def contrast_image(image, ratio):   
    from PIL import Image, ImageEnhance
    new_image= image.convert('RGB')
    new_image = ImageEnhance.Contrast(image)
    new_image= new_image.enhance(ratio)
    return new_image
""" ;
    dc1:language sub:LinguisticSystem ;
    pplan:hasInputVar sub:image , sub:ratio ;
    pplan:hasOutputVar sub:out1 ;
    a bpmn:ScriptTask , pplan:Step ;
    rdfs:label "contrast image by factor" .
}