Do not understand the following tracebacke error in my diary.py

Traceback (most recent call last):                                                                                                              
  File "diary.py", line 107, in <module>                                                                                                        
    menu_loop()                                                                                                                                 
  File "diary.py", line 45, in menu_loop                                                                                                        
    menu[choice]()                                                                                                                              
  File "diary.py", line 55, in add_entry                                                                                                        
    Entry.create(content=data)  

#!usr/bin/env python3
from collections import OrderedDict
import datetime
import sys
import os
from peewee import *

# in console start with - chmod +x diary.py

db = SqliteDatabase('diary.db')



class Entry(Model):
  content = TextField()
  timestamp = DateTimeField(default=datetime.datetime.now)

  class Meta:
    database=db


def initialize():
  """Create database and table if they don't already exist"""
  db.connect
  db.create_tables([Entry], safe=True)


def clear():
  os.system('cls' if os.name=='nt' else 'clear')

def menu_loop():
      """nothing yet"""
      choice = None

      while choice != 'q':
        clear()
        print("Enter 'q' to quit.")
        for key, value in menu.items():
             print('{}) {}'.format(key, value.__doc__))
        choice = input('Action: ').lower().strip()

        if choice in menu:
          clear()
          menu[choice]()

def add_entry():
  """Add an entry"""
  print("Enter you stuffs. Press ctrl+d when done.")
  data = sys.stdin.read().strip()

  if data:
    try:
      if input('Save Entry? [Yn]  ').lower() != 'n':
        Entry.create(content=data)
        print("saved successfully!")

    except EOFError:
      print("save aborted!")



def view_entries(search_query=None):
  """View the items"""
  entries = Entry.select().order_by(Entry.timestamp.desc())
  if search_query:
    entries = entries.where(Entry.content.contains(search_query))

  for entry in entries:
    timestamp = Entry.timestamp.strftime('%A %B %d, %Y %I:%M%p')
    clear()
    print(timestamp)
    print('='*len(timestamp))
    print(entry.content)
    print('\n\n'+'='*len(timestamp))
    print('n) next entry')
    print('d) delete entry')
    print('q) return to main menu')

    next_action = input('Action: [ndq] ').lower().strip()
    if next_action == 'q':
      break
    elif next_action == 'd':
      delete_entry(entry)


def search_entries():
  """Search entries for a string"""
  view_entries = input("seaech query: ")


def delete_entry(Entry):
  """delete an Entry"""
  if input("Are you sure [yN]").lower()=='y':
    entry.delete_instance()
    print("Entry deleted" )

menu = OrderedDict([
    ('a', add_entry),
    ('v', view_entries),
    ('s', search_entries),
  ])


if __name__== '__main__':
  initialize()
  menu_loop()