Вам необходимо установить cx_oracle и SQLAlchemy.
import cx_Oracle
import sqlalchemy as sa
import pandas as pd
engine = sa.create_engine ('oracle+cx_oracle://user:pwd@host:port/dbname')
connection = engine.connect()
df = pd.read_sql("select * from otheruser.table", connection)
df.head()
df.to_csv("file.csv")