Value counts of all categorical columns pandas code example

Example 1: frequency unique pandas

df.stack().value_counts()

Example 2: pandas value_counts multiple columns

In [212]:
df = pd.DataFrame(np.random.randint(0, 2, (10, 4)), columns=list('abcd'))
df.apply(pd.Series.value_counts)
Out[212]:
   a  b  c  d
0  4  6  4  3
1  6  4  6  7