The function called populate_template which takes in a template string e.g. " Hello {!first_name} - How are you?" and a hash of fields e.g { "first_name" : "John" } as arguments and returns the template string with the fields inserted in the correct place. It takes in 2 arguments: - template (String) - fields (hash / dictionary)

gistfile1.txt

import re
def populate_template(template, fields= {}):
    for key, value in fields.items():
      if template.find(key):
          template_new = re.sub(key, fields[key], template)
    return template_new