Easily add new snippets for jupyter nbextension.

new_jupyter_snippet.py

def new_snippet(name, code):
    '''Save a new snippet at json for Snippets nbextesion

        Parameters
        ----------
        name : str
            Name that will appear in the drop-down list
        code : str
            String containing the lines of code to be saved.
        '''
    import json
    path = '<change to your path>/jupyter/nbextensions/snippets/'
    file= path + 'snippets.json'
    with open(file) as json_file:  
        data = json.load(json_file)
    code = code.split('\\n')
    data['snippets'] += [{'name': name, 'code':code}]
    with open(file, 'w') as outfile:  
        json.dump(data, outfile, indent=4, sort_keys=True)
    print('Snippet saved.')
    return


# Example : 

code = """
def new_snippet(name, code):
    '''Save a new snippet at json for Snippets nbextesion

        Parameters
        ----------
        name : str
            Name that will appear in the drop-down list
        code : str
            String containing the lines of code to be saved.
        '''
    import json
    path = '<change to your path>/jupyter/nbextensions/snippets/'
    file= path + 'snippets.json'
    with open(file) as json_file:  
        data = json.load(json_file)
    code = code.split('\\n')
    data['snippets'] += {'name': name, 'code':code}
    with open(file, 'w') as outfile:  
        json.dump(data, outfile, indent=4, sort_keys=True)
    print('Snippet saved.')
    return
"""


new_snippet("New snippet",code)