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: "By saying empty, it doesn't mean all elements have a value of Null."

A block of code is set as follows:

>>> def random_policy():
...     action = torch.multinomial(torch.ones(n_action), 1).item()
...     return action

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

conda install pytorch torchvision -c pytorch

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: "This approach is called random search, since the weight is randomly picked in each trial with the hope that the best weight will be found with a large number of trials."