# Importing the picketPlot function from the petrolib.interp module
from petrolib.interp import picketPlot
# Setting the style to 'classic' using plt.style.use
plt.style.use('classic')
# Generating a picket plot using the picketPlot function, with parameters specifying DataFrame (well_df),
# resistivity ('RT') and porosity ('NPHI') curves, color-coding by numeric value ('num'),
# coloring by gamma ray ('GR') curve, colormap ('rainbow'), and reservoir name ('A')
picketPlot(well_df, rt='RT', por='NPHI', color_code='num', hue='GR', cmap='rainbow', res_name='A')