1. Python & Oracle Requirements Installation Oracle Instant Client
cx_Oracle module
Installation
Windows: Win Installer
Linux: RPM or cx_Oracle.so

2. Example: accessing database
import cx_Oracle
connection =
cursor = connection.cursor()
bind_vars={'uid':25}
sql='SELECT id,Firstname,Lastname FROM TB_NAME where id>:uid‘
cursor.execute( sql, bind_vars)
rows = cursor.fetchall()
for id,firstname,lastname in rows:
print str(id)+' '+firstname+' '+lastname+"\n“
cursor.close()
connection.close()

3. Example: connection pooling
import cx_Oracle
pool = cx_Oracle.SessionPool(
USER,
PASSWORD,
TNS,
1, #min number of sessions controlled by pool
3, #max number of sessions controlled by pool
1, #additional sessions to be opened per acquire
DB.Connection, #connection type
True) #OCI_THREADED
pool.timeout = 120 #idle session timeout
#thread body
first='Cristiano'
lase='Ronaldo'
connection = pool.acquire()
cursor = connection.cursor()
cursor.execute("insert into players values (:a,:b)", {'a':first,'b':last} )
connection.commit()
cursor.close()
#end of thread body
pool.release(connection)

4. Connection API Functions Attributes
begin() - explicitly begin a new transaction
cancel() - cancel a long-running transaction
close() - close connection
commit() - commit any pending transactions to the database
cursor() - returns new cursor objects
ping() - tests if the connection is still active
rollback() - rollback any pending transactions
Attributes
autocommit - read-write, autocommit mode is on or off
current_schema - read-write, sets the current schema for the session
password - read-write
encoding - read-only, character set in use by the Oracle client
stmtcachesize - read-write, specifies the size of the statement cache
tnsentry - read-only, returns the TNS entry of the database
username - read only
version - read-only, version of the database

5. Cursor API Functions Attributes
callfunc(name, returnType, parameters=[], keywordParameters = {})
callproc(name, parameters=[], keyewordParameters = {})
connection() - returns a reference to the connection object
bindnames() - return list of bind variable names
execute(statement[, parameters], **keywordParameters)
executemany(statement, parameters)
fetchall()
fetchmany([numRows=cursor.arraysize])
fetchone() - fetching of next row
next() - like fetchone()
parse(statement) - does parsing only
prepare(statement[, tag]) – does preparation of the statement
close()
Attributes
arraysize -  read-write, number of rows to fetch
bindvars - read-onle, bind variables used for the last execute
rowcount - read-only, number of rows fatched