#IMAGE CONVERT COMMAND LINE HOW TO#
#IMAGE CONVERT COMMAND LINE CODE#

If you know how functions are declared and called in various programming languages, then you’ll immediately feel at home when you discover how to use command line arguments. You can draw the analogy that a command line argument is similar to a function parameter. This allows us to give our program different input on the fly without changing the code. Why do we use command line arguments?Īs stated, command line arguments give additional information to a program at runtime. That being said, on this blog we make extensive use of command line arguments in our Python scripts and I’d even go so far to say that 98% of the articles on this blog make use of them. Not all programs have command line arguments as not all programs need them.

They contain additional information for our program so that it can execute. What are command line arguments?Ĭommand line arguments are flags given to a program/script at runtime. And by the end of the post you’ll be able to work with command line arguments like a pro.

#IMAGE CONVERT COMMAND LINE CODE#

You’ll find that you do not have to modify a single line of code to work with them. Inside the rest of today’s post you’ll learn that command line arguments are a lot easier to work with than they seem (even if you have never used them before). Many other readers run into similar problems when working with command line arguments - but the honest truth is that nearly all of these errors can be avoided by taking the time to educate yourself on command line arguments.

Usage: detect_faces.py -i IMAGE -p PROTOTXT -m MODEL ĭetect_faces.py: error: the following arguments are required: -i/–image, -p/–prototxt, -m/–modelĪrjun is far from alone in struggling with this error. Hey Adrian, I just downloaded the source code to your deep learning face detection blog post, but when I execute it I get the following error: In fact, just an hour before I decided to write this blog post, I received the following email from Arjun: Looking for the source code to this post? Jump Right To The Downloads Section Python, argparse, and command line argumentsĮach day I receive 3-5 emails or comments from PyImageSearch readers who are struggling with command line arguments.

Image convert command line