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#------------------------------------------------------------------------------

# Sets the environment used by most Python cx_Oracle samples. Production

# applications should consider using External Authentication to

# avoid hard coded credentials.

# You can set values in environment variables to bypass the sample requesting

# the information it requires.

# CX_ORACLE_SAMPLES_MAIN_USER: user used for most samples

# CX_ORACLE_SAMPLES_MAIN_PASSWORD: password of user used for most samples

# CX_ORACLE_SAMPLES_EDITION_USER: user for editioning

# CX_ORACLE_SAMPLES_EDITION_PASSWORD: password of user for editioning

# CX_ORACLE_SAMPLES_EDITION_NAME: name of edition for editioning

# CX_ORACLE_SAMPLES_CONNECT_STRING: connect string

# CX_ORACLE_SAMPLES_SYSDBA_USER: SYSDBA user for setting up samples

# CX_ORACLE_SAMPLES_SYSDBA_PASSWORD: SYSDBA password for setting up samples

# CX_ORACLE_SAMPLES_CONNECT_STRING can be set to an Easy Connect string, or a

# Net Service Name from a tnsnames.ora file or external naming service,

# or it can be the name of a local Oracle database instance.

# If cx_Oracle is using Instant Client, then an Easy Connect string is

# generally appropriate. The syntax is:

# [//]host_name[:port][/service_name][:server_type][/instance_name]

# Commonly just the host_name and service_name are needed

# e.g. "localhost/orclpdb1" or "localhost/XEPDB1"

# If using a tnsnames.ora file, the file can be in a default

# location such as $ORACLE_HOME/network/admin/tnsnames.ora or

# /etc/tnsnames.ora. Alternatively set the TNS_ADMIN environment

# variable and put the file in $TNS_ADMIN/tnsnames.ora.

#------------------------------------------------------------------------------

from __future__ import print_function

import getpass

import os

import sys

# for Python 2.7 we need raw_input

try:

input = raw_input

except NameError:

pass

# default values

DEFAULT_MAIN_USER = "pythondemo"

DEFAULT_EDITION_USER = "pythoneditions"

DEFAULT_EDITION_NAME = "python_e1"

DEFAULT_CONNECT_STRING = "localhost/orclpdb1"

# dictionary containing all parameters; these are acquired as needed by the

# methods below (which should be used instead of consulting this dictionary

# directly) and then stored so that a value is not requested more than once

PARAMETERS = {}

def GetValue(name, label, defaultValue=""):

value = PARAMETERS.get(name)

if value is not None:

return value

envName = "CX_ORACLE_SAMPLES_" + name

value = os.environ.get(envName)

if value is None:

if defaultValue:

label += " [%s]" % defaultValue

label += ": "

if defaultValue:

value = input(label).strip()

else:

value = getpass.getpass(label)

if not value:

value = defaultValue

PARAMETERS[name] = value

return value

def GetMainUser():

return GetValue("MAIN_USER", "Main User Name", DEFAULT_MAIN_USER)

def GetMainPassword():

return GetValue("MAIN_PASSWORD", "Password for %s" % GetMainUser())

def GetEditionUser():

return GetValue("EDITION_USER", "Edition User Name", DEFAULT_EDITION_USER)

def GetEditionPassword():

return GetValue("EDITION_PASSWORD", "Password for %s" % GetEditionUser())

def GetEditionName():

return GetValue("EDITION_NAME", "Edition Name", DEFAULT_EDITION_NAME)

def GetConnectString():

return GetValue("CONNECT_STRING", "Connect String", DEFAULT_CONNECT_STRING)

def GetMainConnectString(password=None):

if password is None:

password = GetMainPassword()

return "%s/%s@%s" % (GetMainUser(), password, GetConnectString())

def GetDrcpConnectString():

return GetMainConnectString() + ":pooled"

def GetEditionConnectString():

return "%s/%s@%s" % \

(GetEditionUser(), GetEditionPassword(), GetConnectString())

def GetSysdbaConnectString():

sysdbaUser = GetValue("SYSDBA_USER", "SYSDBA user", "sys")

sysdbaPassword = GetValue("SYSDBA_PASSWORD",

"Password for %s" % sysdbaUser)

return "%s/%s@%s" % (sysdbaUser, sysdbaPassword, GetConnectString())

def RunSqlScript(conn, scriptName, **kwargs):

statementParts = []

cursor = conn.cursor()

replaceValues = [("&" + k + ".", v) for k, v in kwargs.items()] + \

[("&" + k, v) for k, v in kwargs.items()]

scriptDir = os.path.dirname(os.path.abspath(sys.argv[0]))

fileName = os.path.join(scriptDir, "sql", scriptName + "Exec.sql")

for line in open(fileName):

if line.strip() == "/":

statement = "".join(statementParts).strip()

if statement:

for searchValue, replaceValue in replaceValues:

statement = statement.replace(searchValue, replaceValue)

cursor.execute(statement)

statementParts = []

else:

statementParts.append(line)

cursor.execute("""

select name, type, line, position, text

from dba_errors

where owner = upper(:owner)

order by name, type, line, position""",

owner = GetMainUser())

prevName = prevObjType = None

for name, objType, lineNum, position, text in cursor:

if name != prevName or objType != prevObjType:

print("%s (%s)" % (name, objType))

prevName = name

prevObjType = objType

print(" %s/%s %s" % (lineNum, position, text))

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SampleEnv.py

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