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: "After that, create a new file called run.py in the topmost folder."

A block of code is set as follows:

MESSAGES = {
    'default': 'Hello to the World of Flask!',
    'great': 'Flask is great!!',
}

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 wtforms import FileField

class Product(db.Model):
    image_path = db.Column(db.String(255))

    def __init__(self, name, price, category, image_path):
        self.image_path = image_path

class ProductForm(NameForm):
    image = FileField('Product Image')

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

$ python setup.py install

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: "Fill up the form and click on Submit."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.