diff --git a/templates/webapp_ex1/README.md b/templates/webapp_ex1/README.md
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+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.
+
+
+
+![](./img/img_1.png)
diff --git a/templates/webapp_ex1/app.py b/templates/webapp_ex1/app.py
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+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)
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diff --git a/templates/webapp_ex1/img/img_1.png b/templates/webapp_ex1/img/img_1.png
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diff --git a/templates/webapp_ex1/static/style.css b/templates/webapp_ex1/static/style.css
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+body{
+ width:600px;
+}
+
+#button{
+ padding-top: 20px;
+}
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diff --git a/templates/webapp_ex1/templates/_formhelpers.html b/templates/webapp_ex1/templates/_formhelpers.html
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+++ b/templates/webapp_ex1/templates/_formhelpers.html
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+{% macro render_field(field) %}
+
{{ field.label }}
+
{{ field(**kwargs)|safe }}
+ {% if field.errors %}
+
+ {% for error in field.errors %}
+
{{ error }}
+ {% endfor %}
+
+ {% endif %}
+
+{% endmacro %}
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diff --git a/templates/webapp_ex1/templates/entry.html b/templates/webapp_ex1/templates/entry.html
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+++ b/templates/webapp_ex1/templates/entry.html
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+
+
+
+ Webapp Ex 1
+
+
+
+
+{% from "_formhelpers.html" import render_field %}
+
+
+
+
+
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