How to Set Up Your Python Project for Success -with Tests, CI, Coveralls Andmore

You can find lot of information about different libraries and stuffs , i would focus on slightly underrated area (not just for python but for any other language you need to master this skill to become successful programmer )

One of the most important skills you need to acquire to be a successful programmer is the ability to debug your programs. Debugging might be the most under-appreciated, and under-taught, skill in introductory computer science.As programmers we spend 99% of our time trying to get our program to work. We struggle, we stress, we spend hours deep in frustration trying to get our program to execute correctly. Perhaps the most important lesson in debugging is that it is largely avoidable – if you work carefully.

Start Small , Start with something really small. Maybe just two lines and then make sure that runs ok. Hitting the run button is quick and easy, and gives you immediate feedback about whether what you have just done is ok or not. Another immediate benefit of having something small working is that you have something to turn in. Turning in a small, incomplete program, is almost always better than nothing. Keep it working Once you have a small part of your program working the next step is to figure out something small to add to it. If you keep adding small pieces of the program one at a time, it is much easier to figure out what went wrong, as it is most likely that the problem is going to be in the new code you have just added. Less new code means its easier to figure out where the problem is. This notion of Get something working and keep it working is a mantra that you can repeat throughout your career as a programmer. It’s a great way to avoid the frustrations mentioned above.

Debugging a program is a different way of thinking than writing a program. The process of debugging is much more like being a detective. Here are a few rules to get you thinking about debugging.

Everyone is a suspect (Except Python)! It’s common for beginner programmers to blame Python, but that should be your last resort.

Find clues. This is the biggest job of the detective and right now there are two important kinds of clues for you to understand

Error Messages Print Statements Make sure you take the time to understand error messages. They can help you a lot.

print statements are your friends. Use them to help you uncover what is really happening in your code.

Work backward from the error. Many times an error message is caused by something that has happened before it in the program. Always remember that python evaluates a program top to bottom.