added some more steps for the blog post

basic_sitter_bot_with_pickle.py

@@ -0,0 +1,74 @@
+import os
+import pickle
+from typing import Tuple
+
+from flask import Flask, request
+from twilio.rest import Client as TwilioClient
+from twilio.twiml.messaging_response import MessagingResponse
+
+MY_CELL = os.getenv('MY_CELL')
+BOOKER_NUM = os.getenv('MY_TWILIO_NUM')
+
+twilio_client = TwilioClient(os.getenv('TWILIO_SID'), os.getenv('TWILIO_TOKEN'))
+
+app = Flask(__name__)
+app.config.from_object(__name__)
+
+sitters = {}
+if os.path.exists('sitters.p'):
+    sitters = pickle.load(open('sitters.p', 'rb'))
+
+@app.route('/bot', methods=['POST'])
+def bot():
+    from_ = request.values.get('From')
+    body = request.values.get('Body').lower()
+    response = 'I wasn\'t sure what to do with your input. '
+
+    if has_phone_num(body):
+
+        try:
+            sitter_name, sitter_num = add_sitter(body)
+        except (AssertionError, ValueError):
+            response = 'Sorry, did you mean to add a sitter?  Please try again.'
+        else:
+            response = f'Okay, I added {sitter_name.title()} to sitters, with phone # {sitter_num}.  '
+            print(sitters)
+
+    resp = MessagingResponse()
+    resp.message(response)
+    return str(resp)
+
+
+def has_phone_num(string):
+    return len([char for char in string if char.isnumeric()]) == 10
+
+
+def add_sitter(body: str) -> Tuple[str, str]:
+    name, *num_parts = body.split(' ')
+
+    num_only = ''.join(char
+                       for num in num_parts
+                       for char in num if char.isnumeric())
+
+    lowercase_name = name.lower()
+    sitter = sitters.get(lowercase_name)
+
+    assert len(num_only) == 10
+
+    sitters[lowercase_name] = f'+1{num_only}'
+    persist_sitters()
+
+    return name, sitters[lowercase_name]
+
+
+def persist_sitters():
+    pickle.dump(sitters, open('sitters.p', 'wb'))
+
+
+if __name__ == '__main__':
+    if sitters:
+        sitter_list = 'Your sitters are ' + ' and '.join(
+            f'{sitter_name.title()}' for sitter_name in sitters) + '.'
+        twilio_client.api.account.messages.create(to=MY_CELL, from_=BOOKER_NUM, body=sitter_list)
+    app.run(debug=True, port=8000)
+