complete 'visits are never empty' refactor, google-cloud-core unnecessary for Py3

Author: wescpy

step0-webapp2-gaendb-py2/main.py

@@ -31,7 +31,7 @@ def fetch_visits(limit):
 class MainHandler(webapp2.RequestHandler):
     def get(self):
         store_visit(self.request.remote_addr, self.request.user_agent)
-        visits = fetch_visits(10) or ()  # empty sequence if None
+        visits = fetch_visits(10)
         tmpl = os.path.join(os.path.dirname(__file__), 'index.html')
         self.response.out.write(template.render(tmpl, {'visits': visits}))
 

step1-flask-gaendb-py2/main.py

@@ -31,5 +31,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)

step2-flask-cloudndb-py2/main.py

@@ -34,5 +34,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)

step2-flask-cloudndb-py3/main.py

@@ -34,5 +34,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)

step2-flask-cloudndb-py3/requirements.txt

@@ -1,3 +1,2 @@
 Flask==1.1.2
-google-cloud-core==1.4.1
 google-cloud-ndb==1.7.1

step3-flask-datastore-py2/main.py

@@ -35,5 +35,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)

step3-flask-datastore-py3/main.py

@@ -35,5 +35,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)

step3-flask-datastore-py3/requirements.txt

@@ -1,3 +1,2 @@
 Flask==1.1.2
-google-cloud-core==1.4.1
 google-cloud-datastore==2.0.0

step3a-flask-firestore-py3/main.py

@@ -35,5 +35,5 @@ def fetch_visits(limit):
 @app.route('/')
 def root():
     store_visit(request.remote_addr, request.user_agent)
-    visits = fetch_visits(10) or ()  # empty sequence if None
+    visits = fetch_visits(10)
     return render_template('index.html', visits=visits)