flask template

rasbt · rasbt · commit 06830b939358 · 2015-06-25T14:16:13.000-04:00
diff --git a/templates/webapp_ex1/README.md b/templates/webapp_ex1/README.md
@@ -0,0 +1,13 @@
+Sebastian Raschka, 2015
+
+# Flask Example App 1
+
+A simple Flask app that calculates the sum of two numbers entered in the respective input fields.
+
+A more detailed description is going to follow some time in future.
+
+You can run the app locally by executing `python app.py` within this directory.
+
+<hr>
+
+![](./img/img_1.png)
diff --git a/templates/webapp_ex1/app.py b/templates/webapp_ex1/app.py
@@ -0,0 +1,31 @@
+from flask import Flask, render_template, request
+from wtforms import Form, DecimalField, validators
+
+app = Flask(__name__)
+
+
+class EntryForm(Form):
+    x_entry = DecimalField('x:',
+                           places=10,
+                           validators=[validators.NumberRange(-1e10, 1e10)])
+    y_entry = DecimalField('y:',
+                           places=10,
+                           validators=[validators.NumberRange(-1e10, 1e10)])
+
+@app.route('/')
+def index():
+    form = EntryForm(request.form)
+    return render_template('entry.html', form=form, z='')
+
+@app.route('/results', methods=['POST'])
+def results():
+    form = EntryForm(request.form)
+    z = ''
+    if request.method == 'POST' and form.validate():
+        x = request.form['x_entry']
+        y = request.form['y_entry']
+        z = float(x) + float(y)
+    return render_template('entry.html', form=form, z=z)
+
+if __name__ == '__main__':
+    app.run(debug=True)
diff --git a/templates/webapp_ex1/img/img_1.png b/templates/webapp_ex1/img/img_1.png
diff --git a/templates/webapp_ex1/static/style.css b/templates/webapp_ex1/static/style.css
@@ -0,0 +1,7 @@
+body{
+	width:600px;
+}
+
+#button{
+	padding-top: 20px;
+}
diff --git a/templates/webapp_ex1/templates/_formhelpers.html b/templates/webapp_ex1/templates/_formhelpers.html
@@ -0,0 +1,12 @@
+{% macro render_field(field) %}
+  <dt>{{ field.label }}
+  <dd>{{ field(**kwargs)|safe }}
+  {% if field.errors %}
+    <ul class=errors>
+    {% for error in field.errors %}
+      <li>{{ error }}</li>
+    {% endfor %}
+    </ul>
+  {% endif %}
+  </dd>
+{% endmacro %}
diff --git a/templates/webapp_ex1/templates/entry.html b/templates/webapp_ex1/templates/entry.html
@@ -0,0 +1,26 @@
+<!doctype html>
+<html>
+  <head>
+    <title>Webapp Ex 1</title>
+	<link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
+  </head>
+  <body>
+
+{% from "_formhelpers.html" import render_field %}
+
+<form method=post action="/results">
+  <dl>
+	{{ render_field(form.x_entry, cols='1', rows='1') }}
+    {{ render_field(form.y_entry, cols='1', rows='1') }}
+  </dl>
+  <div>
+	  <input type=submit value='Submit' name='submit_btn'>
+  </div>
+
+  <dl>
+	x + y = {{ z }}
+  </dl>
+</form>
+
+  </body>
+</html>
