Conventions used

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

Code in text: 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: "In our main program, we create the fork as a lock object first; then, we create two Spouse thread objects, which are each other's partner attributes."

A block of code is set as follows:

fork = threading.Lock()
partner1 = Spouse('Wife', None)
partner2 = Spouse('Husband', partner1)
partner1.partner = partner2
partner1.start()
partner2.start()
partner1.join()
partner2.join()
print('Finished.')

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

fork = threading.Lock()
partner1 = Spouse('Wife', None)
partner2 = Spouse('Husband', partner1)
partner1.partner = partner2
partner1.start()
partner2.start()
partner1.join()
partner2.join()
print('Finished.')

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

pip install numpy

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: "The Coordinates section shows the values that each of these dimensions can take on."

Tips or important notes

Appear like this.