Accessing the Journal when Embedding Python

[ELI]

When embedding python in a ledger file, how do I access the current journal from the session?

- Harpreet "Eli" Sangha

[John Wiegley]

>>>>> ELI <eli...@gmail.com> writes:

> When embedding python in a ledger file, how do I access the current journal
> from the session?

I don't believe the whole journal is ever surfaced as on object the Python
API. If it were, it would be an object called "journal"..

John

[ELI]

Would this be a viable feature request?

- Harpreet "Eli" Sangha

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[Martin Blais]

Just curious, what's your use case? 

Backing up one step, what are you trying to achieve?

[ELI]

I'm trying to implement a custom balance assertion in my ledger file. So, I want to access the balance of a specified account.

- Harpreet "Eli" Sangha

[Martin Blais]

If it's not too indiscreet, what's the use case behind the assertion?

What high-level problem are you trying to solve?

[ELI]

When reconciling stock holdings with brokerage statements I want to be able to just punch in the holdings as displayed on the statement and:
1) Assert that any commodities that are not specified have a zero balance.
2) Compare commodities that are specified with the precision (rounding) used on the statement.

- Harpreet "Eli" Sangha

[John Wiegley]

>>>>> ELI <eli...@gmail.com> writes:

> Would this be a viable feature request?

Sure! And looking at the source code, the journal object *is* made available
to the Python API.

John

[ELI]

John,

I see journal methods exposed, but not the journal object itself.  Can you provide the attribute (i.e. ledger.journal, ledger.session.journal) or the source you've referring to?

- Harpreet "Eli" Sangha

[ELI]

So, accessing the journal object aside, I'm having trouble retrieving the balance of an account from python.  I also noticed that the journal and account accesses are commending out in python/demo.py in the ledger source.  Any thoughts?

>>> account.amount()

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

Boost.Python.ArgumentError: Python argument types in

    Account.amount(Account)

did not match C++ signature:

    amount(ledger::account_t {lvalue}, boost::optional<ledger::expr_t&>)

>>> account.total()

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

Boost.Python.ArgumentError: Python argument types in

    Account.total(Account)

did not match C++ signature:

    total(ledger::account_t {lvalue}, boost::optional<ledger::expr_t&>)

- Harpreet "Eli" Sangha

[John Wiegley]

>>>>> ELI <eli...@gmail.com> writes:

> So, accessing the journal object aside, I'm having trouble retrieving the
> balance of an account from python. I also noticed that the journal and
> account accesses are commending out in python/demo.py in the ledger
> source. Any thoughts?

>>>> account.amount()

I don't think these attributes are functions.

John

[ELI]

They are, at least on the version I've checked out.  I've made changes locally to fix the issues I've run into thus far and will submit a pull request when I'm in a good state to do so.

- Harpreet "Eli" Sangha

John

[John Wiegley]

>>>>> ELI <eli...@gmail.com> writes:

> They are, at least on the version I've checked out. I've made changes
> locally to fix the issues I've run into thus far and will submit a pull
> request when I'm in a good state to do so.

Ah, ok, thanks!

John