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instructions for running unit tests locally
Latest commit 49952de Jul 28, 2018

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ncclient: Python library for NETCONF clients

ncclient is a Python library that facilitates client-side scripting and application development around the NETCONF protocol. ncclient was developed by Shikar Bhushan. It is now maintained by Leonidas Poulopoulos (@leopoul) and Einar Nilsen-Nygaard (@einarnn)



Recent Highlights

Date Release Description
07/02/18 0.6.0 Minor release reinstating Python 3.7 and greater compatibility, but necessitating a change to client code that uses async_mode.
07/02/18 0.5.4 New release rolling up myriad of small commits since 0.5.3. Please note that this release is incompatible wth Python 3.7 due to the use of a new Python 3.7 keyword, async, in function signatures. This will be resolved in 0.6.0


  • Python 2.7 or Python 3.4+
  • setuptools 0.6+
  • Paramiko 1.7+
  • lxml 3.3.0+
  • libxml2
  • libxslt

If you are on Debian/Ubuntu install the following libs (via aptitude or apt-get):

  • libxml2-dev
  • libxslt1-dev


[ncclient] $ sudo python install

or via pip:

pip install ncclient


[ncclient] $ python examples/juniper/*.py


Get device running config

Use either an interactive Python console (ipython) or integrate the following in your code:

from ncclient import manager

with manager.connect(host=host, port=830, username=user, hostkey_verify=False) as m:
    c = m.get_config(source='running').data_xml
    with open("%s.xml" % host, 'w') as f:

As of 0.4.1 ncclient integrates Juniper's and Cisco's forks, lots of new concepts have been introduced that ease management of Juniper and Cisco devices respectively. The biggest change is the introduction of device handlers in connection paramms. For example to invoke Juniper's functions annd params one has to re-write the above with ***device_params={'name':'junos'}***:

from ncclient import manager

with manager.connect(host=host, port=830, username=user, hostkey_verify=False, device_params={'name':'junos'}) as m:
    c = m.get_config(source='running').data_xml
    with open("%s.xml" % host, 'w') as f:

Device handlers are easy to implement and prove to be futureproof.

Supported device handlers

  • Juniper: device_params={'name':'junos'}
  • Cisco CSR: device_params={'name':'csr'}
  • Cisco Nexus: device_params={'name':'nexus'}
  • Cisco IOS XR: device_params={'name':'iosxr'}
  • Cisco IOS XE: device_params={'name':'iosxe'}
  • Huawei: device_params={'name':'huawei'}
  • Alcatel Lucent: device_params={'name':'alu'}
  • H3C: device_params={'name':'h3c'}
  • HP Comware: device_params={'name':'hpcomware'}
  • Server or anything not in above: device_params={'name':'default'}

For Developers

Running Unit Tests Locally

To run the same tests locally as are run via GitHub's CI/CD integration with Travis, the following istructions can be followed:

  1. Create a virtual environment, in this case using virtualenvwrapper:

    mkvirtualenv ncclient-testing
  2. Install your local ncclient package:

    python install
  3. Install testing dependencies:

    pip install nose rednose coverage coveralls mock
  4. Finally, run the tests:

    nosetests test --rednose --verbosity=3

Changes | brief - v0.5.3

  • Add notifications support
  • Add support for ecdsa keys
  • Various bug fixes