Pandas Jenks Natural Breaks classifier with pysal

pandas_pysal.py

from pysal.viz.mapclassify import NaturalBreaks as nb
import pandas as pd

# import your df here

num_classes = 5
classifier = nb(list(df["score"]), k=num_classes)
classifications = list(classifier.bins)

classifications = [0] + classifications
classifications

# [0,
# 56.80252600090453,
# 135.92383802863304,
# 245.82137512507003,
# 468.28844090592867,
# 971.1439060284617]

df['score_naturalbreak'] = pd.cut(df['score'], bins=classifications, include_lowest=True,labels=[1,2,3,4,5])

# result: new column with class numbers from 1 to 5