Tutorial by Examples

In [188]: s = pd.Series(["a","b","c","a","c"], dtype="category") In [189]: s Out[189]: 0 a 1 b 2 c 3 a 4 c dtype: category Categories (3, object): [a, b, c] In [190]: df = pd.DataFrame({"A":["a&q...

In [1]: import pandas as pd import numpy as np In [2]: df = pd.DataFrame(np.random.choice(['foo','bar','baz'], size=(100000,3))) df = df.apply(lambda col: col.astype('category')) In [3]: df.head() Out[3]: 0 1 2 0 bar foo baz 1 baz bar baz 2 foo foo b...