Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "This will create a blank app1 environment and activate it. You should see an (app1) tag in your shell prompt."

A block of code is set as follows:

[default]
  <div>{{ form.password.label }}: {{ form.password }}</div>
  {% if form.password.errors %}
  <ul class="errors">{% for error in form.password.errors %}<li>{{ error }}</li>{% endfor %}</ul>
  {% endif %}

  <div><input type="submit" value="Sign up!"></div>
</form>

{% endblock %}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

    from application.users.views import users
    app.register_blueprint(users, url_prefix='/users')

 from application.posts.views import posts
 app.register_blueprint(posts, url_prefix='/posts')

        # …

Any command-line input or output is written as follows:

$ source ~/envs/testing/bin/activate
(testing)$ pip uninstall numpy

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "Then it asserts that the Sign up! button text appears in the returned HTML".

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.