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: "Any attempt to run the code that has such issues will immediately cause the interpreter to fail, raising a SyntaxError exception."

A block of code is set as follows:

print("hello world")
print "goodbye python2"

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

$ python3 script.py