greeting
is an example of a simple name, but not all names are that simple. Often they include several words: for example, «username». Different languages have different naming styles for variables.
Three main variable naming conventions are sometimes combined. These conventions apply to variable names consisting of several words:
my-super-var
)my_super_var
) are used to separate the partsMySuperVar
)Variables in Python are generally named in the snake_case
style; words are written in lowercase letters and separated by an underscore _
. For more details, you can study the section «How to name variables» in the PEP8 standard.
At Hexlet we start with linters nigh on straight away.
Next, let's look at an example of bad practices and consider why they should be avoided.
Create two variables named «first number» and «second number» in English using snake_case. Write 20
into the first variable and -100
into the second variable. Print the product of the numbers written in the resulting variables.
The code will work with any name, and we only check the printed result, so the task is up to you.
If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:
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.
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.
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.
Your exercise will be checked with these tests:
1from hexlet.test import expect_output
2
3
4def test(capsys):
5 expected = '-2000'
6 expect_output(capsys, expected)
7
Teacher's solution will be available in: