Create a snippet - jupyter notebook snippet extensions

snippets.json

{"snippets":[
            { "name" : "Add Snippet", "code" :[
"!cp /home/jack/.local/share/jupyter/nbextensions/snippets/snippets.json snippets-temp.json",
"name = \" <place name here>\" ",
"codes =\"\"\" ",
"<place code here> ",
"\"\"\" ",
"count = 0 ",
"for line in codes.split('\\n'): ",
"    if len(line) > 0: ",
"        count = count +1 ",
"print(count) ",
"f0 = open('snippets-temp.json', 'r').readlines()",
"f1 = open('/home/jack/.local/share/jupyter/nbextensions/snippets/snippets.json', 'w')",
"for line in f0: ",
"    if line[0:2] != \"]}\": ",
"        f1.write(line) ",
"f1.write('            ,{ \"name\" : \"'+name+'\", \"code\" :[')",
"codes =codes.split(\"\\n\") ",
"cnt = 0 ",
"for line in codes: ",
"    if len(line) > 0: ",
"        cnt = cnt+1 ",
"        print (\"::\",cnt,line) ",
"        if cnt != count: ",
"            f1.write('              \"'+line+'\",\\n')",
"        if cnt == count: ",
"            f1.write('              \"'+line+'\"\\n')",
"f1.write('            ]}')",
"f1.write(']}') ",
"f1.close() "
            ]}
            ,{ "name" : "View snippet.jsons", "code" :[              " ",
              "filein = '/home/jack/.local/share/jupyter/nbextensions/snippets/snippets.json'",
              "import json",
              "from pprint import pprint",
              "with open(filein) as f:",
              "    data = json.load(f)",
              "pprint(data)"
            ]}
            ,{ "name" : "date/filename", "code" :[              " ",
              "import time",
              "DATE = time.strftime('%Y-%m%d%H%M%S')",
              "filename = DATE+_.jpg"
            ]}
]}

nbextensions/snippets/snippets.json is the extension to use when adding snippets to Jupyter Notebook .
this can replace the snippets.json . The first snippet is 'Make Snippet' .
when the snippet is used: enter a snippet name, and paste code between the triple apostrophes.
when you execute the cell the new snippet is entered into the json file . You will have to reload the notebook before it is available.
BACK up the original JUST-in-CASE