Case
WHEN identification_id=     6336(<-my unique numbers)    THEN color_rgb(    255 , 0 ,   0   )
WHEN identification_id=     6667(<-my unique numbers)    THEN color_rgb(    250 ,   0   ,   0   )
(etc. dragged the different parts)
Else color_rgb(1,1,1)
End

from PyQt4.QtGui import QColor
style_dict = {}
layer_1 = QgsMapLayerRegistry.instance().mapLayersByName("Line example")[0]
renderer = layer_1.rendererV2()
if renderer.type() == "categorizedSymbol":
    for cat in renderer.categories():
        style_dict[cat.value()] = (cat.symbol().color(), cat.label())

categories = []
layer_2 = QgsMapLayerRegistry.instance().mapLayersByName("Point example")[0]
for classes, (color, label) in style_dict.items():
    symbol = QgsSymbolV2.defaultSymbol(layer_2.geometryType())
    symbol.setColor(QColor(color))
    category = QgsRendererCategoryV2(classes, symbol, label)
    categories.append(category)

field = 'ID'
renderer = QgsCategorizedSymbolRendererV2(field, categories)
layer_2.setRendererV2(renderer)
layer_2.triggerRepaint()