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: “Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system.”

A block of code is set as follows:

results_df = pd.DataFrame(results).dropna()
results_df.columns = ['client','slope','std']
results_df.index = results_df.client
results_df = results_df.drop(['client'],axis=1)
results_df.head()

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

df.columns.tolist()
>>> ['period', 'sub_market', 'client_class', 'division', 'brand','cat', 'product', 'client_code', 'client_name', 'kgs_sold']

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

!pip install --upgrade openpyxl scikit-surprise

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: “Select System info from the Administration panel.”

Tips or important notes

Appear like this.