Step definitions for any of when/then/given/and. Reopened

[Gelembjuk]

I have already asked this, but it seems my question was understand wrong. I would like one more attempt :)

Is there a way to use Then steps for When definitions with pytest-bdd?

Example,

I have the step in my scenario

Then User downloads the file "test_file.txt"

But my definitions is

@when(parsers.parse('User downloads the file "{file_name}"'))
def step_user_downloads_file(bdd_context, file_name):
    pass

There is the error about step is not found. I have scenarios where same step is used with "When" keyword. I would like to use with both. But more globally, i would like to use any step definitions with any of keywords When/Then/Given/And .

Is it possible?
Or there are some "best practices" or rules against this?

More info.

The question is , can i write
Then User downloads the file "test_file.txt"
if my declaration is
@when(parsers.parse('User downloads the file "{file_name}"'))

I mean, the step was declared with the "when", but i used the step with "then".
When i tested this i have got the error , something like "step is not found" or so.

If i write (When instead of Then)
When User downloads the file "test_file.txt"

Then the step can be found fine. So, this is not where to write a step declaration, it is about the key word is different.

is this supported?