read rows in loops as a dictionary about pynmrstar HOT 11 CLOSED

If you're just reading a file looking for specific tag, SAS has a separate parser for this: one that returns tag-value pairs.

I think if you wanted to Do It Right(tm) you'd add a Row class to the loop -- like sqlite3 does it: optional via row_factory. Jon?

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? If you're just reading a file looking for specific tag, SAS has a separate parser for this ? - not quite sure I follow the sas reference

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Here is something which exists already and I believe meets your needs:

>>> a = pynmrstar.Entry.from_database(15000)
>>> l = a[0][0]
>>> l.get_tag(['ordinal', 'family_name'], dict_result=True)
[{'Ordinal': '1', 'Family_name': 'Cornilescu'}, {'Ordinal': '2', 'Family_name': 'Cornilescu'}, {'Ordinal': '3', 'Family_name': 'Hadley'}, {'Ordinal': '4', 'Family_name': 'Gellman'}, {'Ordinal': '5', 'Family_name': 'Markley'}]

The only difference being that you need to specify which tags you want. The presumption here is that you don't need the dictionary to contain values your code doesn't know how to handle - since presumably they would just be ignored anyway. It also would raise an exception if you ask for a tag that isn't present, which would make it clear where an issue is right away, versus getting a generator of values and only realizing later that a particular key is missing with an IndexError.

If you really do need all the tags in the dictionary though, you could do the following:

l.get_tag(l.tags, dict_result=True)

Though that is admittedly a little clunky looking, it will work fine.

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? If you're just reading a file looking for specific tag, SAS has a separate parser for this ? - not quite sure I follow the sas reference

https://github.com/bmrb-io/SAS -- there is a python3 branch that passes basic tests.

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Here is something which exists already and I believe meets your needs:

Though looking at this further, it really should return the tag names with the same capitalization you use to query them. Otherwise if your specified capitalization doesn't match the file, you'll run into an annoying discrepancy. I'll look into updating this code.

Does this meet your needs? If not, if you describe exactly what sort of operation you're performing on the loop as you iterate through the rows, I may be able to provide an idiomatic way to do it.

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