[GNC-dev] Session creation fails in Python with TypeError

[Peter Zimmerer]

Hi all,

playing around with the Python bindings in GnuCash 4.0 I have got the
following stack trace from example script simple_book.py:


uri: xml:///tmp/simple_book.gnucash
Traceback (most recent call last):
  File "simple_book.py", line 14, in <module>
    with Session(uri, is_new=True) as ses:
  File "/usr/local/lib/python3/dist-packages/gnucash/gnucash_core.py",
line 131, in __init__
    self.begin(book_uri, ignore_lock, is_new, force_new)
  File "/usr/local/lib/python3/dist-packages/gnucash/gnucash_core.py",
line 185, in new_function
    return_value = function(self, *args)
  File "/usr/local/lib/python3/dist-packages/gnucash/function_class.py",
line 94, in method_function
    *process_list_convert_to_instance(meth_func_args) )
TypeError: qof_session_begin() takes 3 positional arguments but 5 were given


This seams to be caused by changing the interface of function
qof_session_begin from the triple (ignore_lock, create, force) to a
SessionOpenMode in GnuCash 4.0.

Pull request https://github.com/Gnucash/gnucash/pull/748 is a try to fix
this for the python bindings in a compatible way by introducing a new
(session_)open_mode as a new keyword parameter and use it instead of the
Boolean triple to call the C function.

If you decide to take over the pull request please review it carefully
because I'm not an experienced Python programmer.

Kind regards,
Peter

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