It depends on your goal, but the simplest way to iterate through all atoms
in Python API is:
```
space = AtomSpace()
for atom in space:
print('atom:', atom)
```
Best regards,
Vitaly
On Monday, January 6, 2020 at 11:51:54 PM UTC+3, linas wrote:
>
> ? There is no `scheme_eval` in the snippet of code that you just posted.
>
> You can get all atoms (links and nodes, at the same time) by saying
>
> atomspace.get_atoms_by_type(types.Atom)
>
> which will return both. That way, you don't need the call to `
>
> traverse_atomspace_helper`
>
>
> There are two bugs in
>
> traverse_atomspace_helper
>
> One bug is that it will print many atoms more than once (potentially
> duplicating thousands or millions of times). The other bug is that there
> are links with no outgoing sets that are perfectly valid -- e.g. (TrueLink)
> or the empty set (SetLink) and so on.
>
> You don't need the pattern matcher to "traverse the whole atomspace". the
> get-atoms-by-type will return all of them, without any missing, without any
> duplicates.
>
> (I mean, you can write a pattern matcher query that will run on the entire
> atomspace, but this is usually undesirable, since .. it eats cpu time.)
>
> --linas
>
> On Mon, Jan 6, 2020 at 5:20 AM Xabush Semrie <[email protected]
> <javascript:>> wrote:
>
>> I want to traverse the whole atomspace loaded using Python API. So far I
>> have tried this:
>>
>>
>> from opencog.atomspace import types
>>
>> links = atomspace.get_atoms_by_type(types.Link)
>> #nodes = atomspace.get_atoms_by_type(types.Node)
>>
>> def traverse_atomspace(lns):
>> for link in lns:
>> link_arr = []
>> traverse_atomspace_helper(link, link_arr)
>>
>> def traverse_atomspace_helper(link, container):
>> if len(link.out) == 0:
>> return
>> for atom in link.out:
>> if len(atom.out) != 0: # it is a link by itself
>> traverse_atomspace_helper(atom, container)
>> else:
>> print(atom)
>>
>> traverse_atomspace(links)
>>
>>
>> This prints the all the atoms as it traverses through each link. But I
>> was wondering if there is a better way to do it? Can we use pattern matcher
>> functions “natively”? i.e without going through scheme_eval madness?
>>
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>>
>
>
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>
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