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: "Commands such as cat, grep, sed, and awk are quite old and their behavior is well-documented on the internet."
A block of code is set as follows:
import csv
import sys
w = csv.writer(sys.stdout)
for row in csv.DictReader(sys.stdin):
w.writerow([row['stars'], row['text'].replace('\n', '')])
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
import csv
import sys
w = csv.writer(sys.stdout)
for row in csv.DictReader(sys.stdin):
w.writerow([row['stars'], row['text'].replace('\n', '')])
Any command-line input or output is written as follows:
$ cat data/yelp/yelp_review.csv | \
python parse_yelp_dataset.py \
> data/yelp/yelp_review.v1.csv
Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."
Warnings or important notes appear like this.
Tips and tricks appear like this.
