Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "This will generate two files: key.pem and key.pub, with a private/public pair."

A block of code is set as follows:

class ThoughtModel(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50))
    text = db.Column(db.String(250))
    timestamp = db.Column(db.DateTime, server_default=func.now())

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

# Create a new thought
new_thought = ThoughtModel(username=username, text=text, timestamp=datetime.utcnow())
db.session.add(new_thought)

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

$ openssl rsa -in key.pem -outform PEM -pubout -out key.pub

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."