Free Python course. Sign Up for tracking progress →

Python: Methods as expressions

Methods are expressions, like variables or function calls, which means they can be combined in different ways.

For example, you can use them in operations:

name = 'Shaya'
'hi, ' + name.upper() + '!'  # hi, SHAYA!

Or in function parameters:

name = 'robb'
print(name.lower())  # => robb
num1 = 5
num2 = 30
# bit_length() - calculates the number of bits needed to represent a number in binary form
print(num1.bit_length() + num2.bit_length())  # => 8


Find the characters N and , (comma) inside the text in the text variable. Print their indices on the screen. Expected output from the tests:

Index Of N: 0
Index Of ,: 25

Your task is to find these indices in the string using the .find() method and put them in print() without using intermediate variables. If you want to split the output into two lines, you may need \n.

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.

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