pandas: filter rows of DataFrame with operator chaining

Question

Most operations in pandas can be accomplished with operator chaining (groupby, aggregate, apply, etc), but the only way I

Answer 1

Filters can be chained using a Pandas query:

df = pd.DataFrame(np.random.randn(30, 3), columns=['a','b','c'])
df_filtered = df.query('a > 0').query('0 < b < 2')

Filters can also be combined in a single query:

df_filtered = df.query('a > 0 and 0 < b < 2')