01-Fundamentals Configuration Guide

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14-Python configuration
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Using Python

About Python

Comware 7 provides a built-in Python interpreter. You can use Python to perform the following tasks:

·     Execute Python scripts to implement automatic device configuration.

·     Enter Python shell to configure the device by using the following items:

¡     Python 2.7 commands.

¡     Python 2.7 standard API.

¡     Extended API. For more information about the extended API, see "Comware 7 extended Python API."

Executing a Python script

To execute a Python script, use the following command in user view:

python filename

Entering the Python shell

To enter the Python shell from user view, execute the following command:

python

Importing and using the extended Python API

To use the extended Python API, you must first import the API to Python.

Importing the entire extended API and using the API

Procedure

1.     Enter the Python shell from user view.

python

2.     Import the entire extended API.

import platformtools

3.     Execute an extended API function.

platformtools.api

Example

# Use extended API function Transfer to download the test.cfg file from TFTP server 192.168.1.26.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.Transfer('tftp', '192.168.1.26', 'test.cfg', 'flash:/test.cfg', user='', password='')

<platformtools.Transfer object at 0xb7eab0e0>

Importing an extended API function and using the function

Procedure

1.     Enter the Python shell from user view.

python

2.     Import an extended API function.

from platformtools import api-name

3.     Execute an extended API function.

api-function

Example

# Use extended API function Transfer to download the test.cfg file from TFTP server 192.168.1.26.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> from platformtools import Transfer

>>> Transfer('tftp', '192.168.1.26', 'test.cfg', 'flash:/test.cfg', user='', password='')

<platformtools.Transfer object at 0xb7e5e0e0>

Exiting the Python shell

To exit the Python shell, execute the following command in the Python shell.

exit()

Python usage examples

Example: Using a Python script for device configuration

Network configuration

Use a Python script to perform the following tasks:

·     Download configuration files main.cfg and backup.cfg to the device.

·     Configure the files as the main and backup configuration files for the next startup.

Figure 1 Network diagram

 

Procedure

# Use a text editor on the PC to configure Python script test.py as follows:

#!usr/bin/python

import platformtools

 

platformtools.Transfer('tftp', '192.168.1.26', 'main.cfg', 'flash:/main.cfg')

platformtools.Transfer('tftp', '192.168.1.26', 'backup.cfg', 'flash:/backup.cfg')

platformtools.CLI('startup saved-configuration flash:/main.cfg main ;startup saved-configuration flash:/backup.cfg backup')

# Use TFTP to download the script to the device.

<Sysname> tftp 192.168.1.26 get test.py

# Execute the script.

<Sysname> python flash:/test.py

<Sysname>startup saved-configuration flash:/main.cfg main

Please wait...... Done.

<Sysname>startup saved-configuration flash:/backup.cfg backup

Please wait...... Done.

Verifying the configuration

# Display startup configuration files.

<Sysname> display startup

 Current startup saved-configuration file: flash:/startup.cfg

 Next main startup saved-configuration file: flash:/main.cfg

 Next backup startup saved-configuration file: flash:/backup.cfg


Comware 7 extended Python API

The Comware 7 extended Python API is compatible with the Python syntax.

channel

Use channel to execute Comware 7 CLI commands and create channel objects.

Syntax

channel(command=‘’)

Parameters

command: Specifies the commands to be executed. To enter multiple commands, use a space and a semicolon (;) as the delimiter. To enter a command in a view other than user view, you must first enter the commands used to enter the view. For example, you must enter ’system-view ;display interface brief | include UP’ to execute the display interface brief | include UP command.

Usage guidelines

This API function supports only Comware 7 commands. It does not support Linux, Python, or Tcl commands.

The API function is used for automated testing.

The list objects returned by the channel function might contain hexadecimal hidden characters such as 0x08. To hide the hexadecimal hidden characters, you can use the CLI function instead, or use the for loop to output the execution result of the channel function, for example:

<Sysname> python

>>> import platformtools

>>> c = platformtools.channel('display vlan')

>>> for value in c:

...  print value

...

display vlan

 Total VLANs: 13

 The VLANs include:

 1(default), 2-3, 10, 20, 30, 40, 100-101, 200-202, 300

<Sysname>

Returns

Output from the executed commands, in the format of a list object.

Examples

# Display the VLAN inforamtion.

<Sysname> python

>>> import platformtools

>>> platformtools.channel('display vlan')

Sample output

['display vlan', ' Total VLANs: 13', ' The VLANs include:', ' 1(default), 2-3, 10, 2

0, 30, 40, 100-101, 200-202, 300, \x08\x08 ', '<Sysname>'] 

CLI

Use CLI to execute Comware 7 CLI commands and create CLI objects.

Syntax

CLI(command=‘’, do_print=True)

Parameters

command: Specifies the commands to be executed. To enter multiple commands, use a space and a semicolon (;) as the delimiter. To enter a command in a view other than user view, you must first enter the commands used to enter the view. For example, you must enter ’system-view ;local-user test class manage’ to execute the local-user test class manage command.

do_print: Specifies whether to output the execution result:

·     True—Outputs the execution result. This value is the default.

·     False—Does not output the execution result.

Usage guidelines

This API function supports only Comware 7 commands. It does not support Linux, Python, or Tcl commands.

Returns

CLI objects

Examples

# Add a local user named test.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.CLI('system-view ;local-user test class manage')

Sample output

<Sysname> system-view

System View: return to User View with Ctrl+Z.

[Sysname] local-user test class manage

New local user added.

<platformtools.CLI object at 0xb7f680a0>

get_error

Use get_error to get the error information from the download operation.

Syntax

Transfer.get_error()

Returns

Error information (if there is no error information, None is returned)

Examples

# Download file test.cfg from TFTP server 1.1.1.1 and get the error information from the operation.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> c = platformtools.Transfer('tftp', '1.1.1.1', 'test.cfg', 'flash:/test.cfg', user='', password='')

>>> c.get_error()

Sample output

'Timeout was reached'

get_output

Use get_output to get the output from executed commands.

Syntax

CLI.get_output()

Returns

Output from executed commands

Examples

# Add a local user and get the output from the command.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> c = platformtools.CLI('system-view ;local-user test class manage', False)

>>> c.get_output()

Sample output

['<Sysname>system-view', 'System View: return to User View with Ctrl+Z.', '[Sysname]local-user test class manage', 'New local user added.']

get_self_slot

Use get_self_slot to get the member ID of the master device.

Syntax

get_self_slot()

Returns

A list object in the format of [-1,slot-number]. The slot-number indicates the member ID of the master device.

Examples

# Get the member ID of the master device. 

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.get_self_slot()

Sample output

[-1,0]

get_slot_info

Use get_slot_info to get information about a member device.

Syntax

get_slot_info()

Returns

A dictionary object in the format of {'Slot': slot-number, 'Status': 'status', 'Chassis': chassis-number, 'Role': 'role', 'Cpu': CPU-number }. The slot-number argument indicates the member ID of the device. The status argument indicates the status of the member device. The chassis-number and CPU-number arguments are fixed at 0. The role argument indicates the role of the member device.

Examples

# Get information about the device, a card, or a member device.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.get_slot_info(1)

Sample output

{'Slot': 1, 'Status': 'Normal', 'Chassis': 0, 'Role': 'Master', 'Cpu': 0}

get_slot_range

Use get_slot_range to get the supported IRF member ID range.

Syntax

get_slot_range()

Returns

A dictionary object in the format of {'MaxSlot': max-slot-number, 'MinSlot': min-slot-number }. The max-slot-number argument indicates the maximum member ID. The min-slot-number argument indicates the minimum member ID.

Examples

# Get the supported IRF member ID range.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.get_slot_range()

Sample output

{'MaxSlot': 129, 'MinSlot': 1}

get_standby_slot

Use get_standby_slot to get the member IDs of the subordinate devices.

Syntax

get_standby_slot()

Returns

A list object in one of the following formats:

·     [ ]—The IRF fabric does not have a subordinate device.

·     [[-1,slot-number]]—The IRF fabric has only one subordinate device.

·     [[-1,slot-number1],[-1,slot-number2],...]—The IRF fabric has multiple subordinate devices.

The slot-number arguments indicate the member IDs of the subordinate devices.

Examples

# Get the member IDs of the subordinate devices.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.get_standby_slot()

Sample output

[[-1, 1], [-1, 2]]

Transfer

Use Transfer to download a file from a server.

Syntax

Transfer(protocol=‘’, host=‘’, source=‘’, dest=‘’, vrf=‘’,login_timeout=10, user=‘’, password=‘’)

Parameters

protocol: Specifies the protocol used to download a file:

·     ftp—Uses FTP.

·     tftp—Uses TFTP.

·     http—Uses HTTP.

host: Specifies the IP address of the remote server.

source: Specifies the name of the file to be downloaded from the remote server.

dest: Specifies a name for the downloaded file.

vrf: Specifies the VPN instance to which the remote server belongs. This argument represents the VPN instance name, a case-sensitive string of 1 to 31 characters. If the server belongs to the public network, do not specify this argument.

login_timeout: Specifies the timeout for the operation, in seconds. The default is 10.

user: Specifies the username for logging in to the server.

password: Specifies the login password.

Returns

Transfer object

Examples

# Download file test.cfg from TFTP server 192.168.1.26.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> platformtools.Transfer('tftp', '192.168.1.26', 'test.cfg', 'flash:/test.cfg', user='', password='')

Sample output

<platformtools.Transfer object at 0xb7f700e0>

send

Use send to generate and send a log message.

Syntax

SYSLOG.send(digest=‘’, info=‘’, priority=‘’)

Parameters

digest: Specifies a mnemonic for the log message. The mnemonic is a case-sensitive string of 1 to 32 characters.

info: Specifies the contents for the log message, a case-sensitive string of 1 to 1024 characters.

priority: Specifies a priority for the log message, in the range of 0 to 4294967295.

Usage guidelines

You must use the SYSLOG function to create a syslog object before you can generate and send a log message for the object.

For more information about the log message format, see information center configuration in Network Management and Monitoring Configuration Guide.

To enable the current terminal to display the generated log messages, first execute the terminal monitor command in user view.

Returns

None.

Examples

# Enable the current terminal to display log messages, and then generate and send a log message for SNMP. Set the mnemonic to Test, the contents to Try to send one message., and the priority to 1000.

<Sysname> terminal monitor

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> a = platformtools.SYSLOG('snmp')

>>> a.send('Test','Try to send one message.',1000)

Sample output

>>> %Jan  1 06:24:17:908 2019 Sysname SNMP/0/Test: Try to send one message.

SYSLOG

Use SYSLOG to create a syslog object.

Syntax

SYSLOG(module=‘’)

Parameters

module: Specifies a name for the syslog object. The name is a case-insensitive string of 1 to 8 characters.

Usage guidelines

You must create a syslog object before you can send a log message for the object.

Returns

None.

Examples

# Create a syslog object named SNMP and assign the object to variable a.

<Sysname> python

Python 2.7.3 (default)

[GCC 4.4.1] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import platformtools

>>> a = platformtools.SYSLOG('snmp')

>>> a

Sample output

<platformtools.SYSLOG object at 0xb7e180e0>