Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "A Python package is a directory containing one or more Python files (that is, modules) plus one __init__.py file."

A block of code is set as follows:

import ogr
# Open the shapefile and get the first layer.
datasource = ogr.Open("../data/world_borders_simple.shp") 
layer = datasource.GetLayerByIndex(0)
print("Number of features: {}".format(layer.GetFeatureCount()))

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

if __name__ == '__main__':
    gdal.PushErrorHandler('CPLQuietErrorHandler')
    vector_data = PointCollection("../data/geocaching.gpx")
    vector_data.print_information()

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

Collecting django
  Downloading Django-1.9-py2.py3-none-any.whl (6.6MB)
    100% |################################| 6.6MB 43kB/s
Installing collected packages: django
Successfully installed django-1.9

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: "Proceed with the default options by clicking on the Next button."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.