In this book, you will find a few text styles that distinguish between different kinds of information. Most commonly you will see blocks of code during each recipe that will look like this:

>>> employee = pd.read_csv('data/employee')
>>> max_dept_salary = employee.groupby('DEPARTMENT')['BASE_SALARY'].max()

The pandas Series and DataFrames are stylized differently when output in the notebook. The pandas Series have no special formatting and are just raw text. They will appear directly preceding the line of code that creates them in the code block itself, like this:

>>> max_dept_salary.head()
DEPARTMENT
Admn. & Regulatory Affairs      140416.0
City Controller's Office         64251.0
City Council                    100000.0
Convention and Entertainment     38397.0
Dept of Neighborhoods (DON)      89221.0
Name: BASE_SALARY, dtype: float64

DataFrames, on the other hand, are nicely stylized in the notebooks and appear as images outside of the code box, like this:

>>> employee.pivot_table(index='DEPARTMENT', 
                         columns='GENDER', 
                         values='BASE_SALARY').round(0).head()

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: In order to find the average BASE_SALARY by GENDER, you can use the pivot_table method.

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In a Jupyter notebook, when holding down Shift + Tab + Tab with the cursor placed somewhere in the object, a window of the docsstrings will pop out making the method far easier to use."