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PYTHR/deployment/content/unit-6-flask/instructor-resources/05-flask-templates
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Templates

Overview

This lesson teaches how to use templates in Flask. It walks through what templates are, then changes the students' existing apps to pass variables into their index.html. It ends with a You Do, prompting students to combine variables with templates.

Important Notes and Prerequisites

Students are expected to have Flask 0.12 or later installed.

Learning Objectives

In this lesson, students will:

  • Create a template HTML document.
  • Pass variables to a template HTML document via a Flask app.

Duration

30 minutes

Suggested Agenda

Time Activity Purpose
0:00 - 0:03 Welcome Introduce the lesson’s objectives and agenda.
0:05 - 0:10 Jinja Templates High-level discussion on templates.
0:10 - 0:20 Implementing Templates Extending the my_website.py Flask app to pass variables into the template.
0:20 - 0:28 File Variables and Templates Challenge to pull variables from a file into the template.
0:28 - 0:30 Summary Wrap up the learning and share next steps.

Differentiation and Extensions

  • For more advanced students: Try adding for loop logic into template brackets.
  • For more advanced students: Ask them to stylize their html files.
  • For struggling students: Review variable assignment and Flask first principles.

Lesson Procedure

Activity: Welcome (3 min)

Introduce the lesson’s objectives and agenda.

Teaching Tips:

  • This lesson builds on our my_website app from earlier.
  • This is a great moment to answer any outstanding questions about routes/variables.
  • Students will need to firmly understand these concepts in order to apply templates well.

Activity: Jinja Templates (5 min)

High-level discussion on templates.

Teaching Tips:

  • It's not absolutely crucial that students understand how Jinja2 works.
  • It is necessary that they understand the "why" of templates.

Activity: Implementing Templates (10 min)

Extending the my_website.py Flask app to pass variables into the template.

Teaching Tip:

  • There should be sufficient time in this section to answer/clear up outstanding questions regarding the Hello World app.

Activity: File Variables and Templates (8 min)

Challenge to pull variables from a file into the template.

Teaching Tip:

  • After giving students some time, go over the answer with them.

Activity: Summary (2 min)

Wrap up the learning and share next steps.