Update README.md

Added syntax code

README.md

@@ -7,57 +7,60 @@ between peewee models and wtforms, mapping model fields to form fields.
 
 first, create a couple basic models and then use the model_form class factory
 to create a form for the Entry model:
+```python
+from peewee import *
+from wtfpeewee.orm import model_form
 
-    from peewee import *
-    from wtfpeewee.orm import model_form
+class Blog(Model):
+    name = CharField()
 
-    class Blog(Model):
-        name = CharField()
-        
-        def __unicode__(self):
-            return self.name
+    def __unicode__(self):
+        return self.name
 
-    class Entry(Model):
-        blog = ForeignKeyField(Blog)
-        title = CharField()
-        body = TextField()
+class Entry(Model):
+    blog = ForeignKeyField(Blog)
+    title = CharField()
+    body = TextField()
 
-        def __unicode__(self):
-            return self.title
+    def __unicode__(self):
+        return self.title
 
-    # create a form class for use with the Entry model
-    EntryForm = model_form(Entry)
+# create a form class for use with the Entry model
+EntryForm = model_form(Entry)
+```
 
 Example implementation for an "edit" view using Flask:
 
-    @app.route('/entries/<int:entry_id>/', methods=['GET', 'POST'])
-    def edit_entry(entry_id):
-        try:
-            entry = Entry.get(id=entry_id)
-        except Entry.DoesNotExist:
-            abort(404)
-        
-        if request.method == 'POST':
-            form = EntryForm(request.form, obj=entry)
-            if form.validate():
-                form.populate_obj(entry)
-                entry.save()
-                flash('Your entry has been saved')
-        else:
-            form = EntryForm(obj=entry)
-        
-        return render_template('blog/entry_edit.html', form=form, entry=entry)
+```python
+@app.route('/entries/<int:entry_id>/', methods=['GET', 'POST'])
+def edit_entry(entry_id):
+    try:
+        entry = Entry.get(id=entry_id)
+    except Entry.DoesNotExist:
+        abort(404)
 
+    if request.method == 'POST':
+        form = EntryForm(request.form, obj=entry)
+        if form.validate():
+            form.populate_obj(entry)
+            entry.save()
+            flash('Your entry has been saved')
+    else:
+        form = EntryForm(obj=entry)
+
+    return render_template('blog/entry_edit.html', form=form, entry=entry)
+```
 Example template for above view:
+```jinja
+{% extends "layout.html" %}
+{% block body %}
+  <h2>Edit {{ entry.title }}</h2>
 
-    {% extends "layout.html" %}
-    {% block body %}
-      <h2>Edit {{ entry.title }}</h2>
-
-      <form method="post" action="">
-        {% for field in form %}
-          <p>{{ field.label }} {{ field }}</p>
-        {% endfor %}
-        <p><button type="submit">Submit</button></p>
-      </form>
-    {% endblock %}
+  <form method="post" action="">
+    {% for field in form %}
+      <p>{{ field.label }} {{ field }}</p>
+    {% endfor %}
+    <p><button type="submit">Submit</button></p>
+  </form>
+{% endblock %}
+```