Free Python course. Sign Up for tracking progress →

Python: Standard Library

Python comes with a set of useful functions that make up the standard library. It usually includes thousands of functions that are impossible to remember. So the programmer needs to know where to find documentation on these functions, as well as have an idea of the result he or she wants to get. For these reasons, it is difficult to program without the Internet.

Beginners often do not understand how and where to find out about the functions to be used. There is no way to solve this problem. As they work, developers become more experienced and add to their knowledge and practice. Gradually they become familiar with more interesting features that solve their problems differently.

Here are tips to help increase professionalism:

  • Always keep track of which data type you are working with. That way, you will find the function you need in the appropriate section of the documentation. For example, to work with strings, you have to learn string functions

  • Periodically open a section with standard features on your topic, learn the signatures and how to use them

  • Read other people's code on GitHub more often. Pay special attention to the code of the libraries you use

If you follow these tips and pay close attention to detail, you will soon notice how you develop and grow as a professional.


The type() function allows you to define the type of the passed argument. The type name is returned as a string. For example, calling type(10) will return the string <class 'int'> (int, short for integer).

print(type('wow')) # <class 'str'>

Display the type of the variable motto value.

The exercise doesn't pass checking. What to do? 😶

If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:

  • Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.
In my environment the code works, but not here 🤨

Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.

My code is different from the teacher's one 🤔

It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.

In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.

I've read the lessons but nothing is clear 🙄

It's hard to make educational materials that will suit everyone. We do our best but there is always something to improve. If you see a material that is not clear to you, describe the problem in “Discussions”. It will be great if you'll write unclear points in the question form. Usually, we need a few days for corrections.

By the way, you can participate in courses improvement. There is a link below to the lessons course code which you can edit right in your browser.


  • Standard Library a set of useful features included with the programming language.

If you got stuck and don't know what to do, you can ask a question in our community