[DICT] Add Python support for popitem

[EmilyBourne]

Describe the feature

Syntactic and semantic support should be added for popitem. This should be tested by implementing Python printing

Test Code

Provide code which does not currently work but which should do when this issue is fixed:

def foo():
    a = {1,1.0, 2:2.0}
    b = a.popitem()
    c = a.popitem()
    return a, b, c

[shoaib-moeen]

@EmilyBourne . Could you give me a little insight on this?

[shoaib-moeen]

@EmilyBourne I am going to fork the devel-issue1886 branch which already have the pop() method implemented to avoid any conflicts

[EmilyBourne]

@EmilyBourne . Could you give me a little insight on this?

I can explain a bit tomorrow morning with a few links.

[EmilyBourne]

@EmilyBourne I am going to fork the devel-issue1886 branch which already have the pop() method implemented to avoid any conflicts

I think that is the simplest 👍

[EmilyBourne]

@shoaib-moeen
As for #1890, this issue is just about translating Python to Python. This is a little nonsensical but it allows us to ensure that the syntactic and semantic stages are working before printing in low-level languages like C or Fortran (usually the Python printer can be implemented fairly trivially). The main work for this PR will be to create an AST node which describes the popitem method. This issue is similar to other method issues for dicts (#1880-#1890) including #1886 which already has an associated PR (#1891). By forking devel-issue1886 you should therefore encounter the fewest conflicts and should be able to use superclasses that have already been implemented.

For more inspiration this issue is also similar to method issues for lists (#1689-#1701, summarised in #1567) and sets (#1738-#1754, summarised in #1569). Several of these have already been closed and these have associated PRs that you could look at.

I have included several links to docs in my description above. Please take a look for more details