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 (now, X) handles. Here is an example: “For example, let’s write a simple data pipeline that imports three CSVs, traffic_crashes.csv, traffic_crash_vehicle.csv, and traffic_crash_people.csv, as input data.”

A block of code is set as follows:

# Merge the three dataframes into a single dataframemerge_01_df = pd.merge(df, df2, on='CRASH_RECORD_ID')
all_data_df = pd.merge(merge_01_df, df3, on='CRASH_RECORD_ID')

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

aws lambda create-function  -s3-key-function ReverseStringFunction \ --zip-file fileb:// s3_key_function.zip --handler lambda_function. lambda_handler \ 
--runtime python3.8 --role <YOUR IAM ARN ROLE>

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

psql -U postgres

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.