import pandas as pd

from cassandra.cluster import Cluster
from cassandra.auth import PlainTextAuthProvider
from cassandra.query import dict_factory

auth_provider = PlainTextAuthProvider(username=CASSANDRA_USER, password=CASSANDRA_PASS)
cluster = Cluster(contact_points=[CASSANDRA_HOST], port=CASSANDRA_PORT,
    auth_provider=auth_provider)

session = cluster.connect(CASSANDRA_DB)
session.row_factory = dict_factory

sql_query = "SELECT * FROM {}.{};".format(CASSANDRA_DB, CASSANDRA_TABLE)

df = pd.DataFrame()

for row in session.execute(sql_query):
    df = df.append(pd.DataFrame(row, index=[0]))

df = df.reset_index(drop=True).fillna(pd.np.nan)

def pandas_factory(colnames, rows):
    return pd.DataFrame(rows, columns=colnames)

session.row_factory = pandas_factory
session.default_fetch_size = None

query = "SELECT ..."
rslt = session.execute(query, timeout=None)
df = rslt._current_rows

query = "SELECT ..."
df = pd.DataFrame(list(session.execute(query)))