[SciPy-User] [Astropy] Can't write a table in a format other than plain ascii

[Daπid]

Hi

Welcome to Python. The Astropy experts can be found in their mailing list:

http://mail.scipy.org/mailman/listinfo/astropy

You will find better answers there.

In any case, if you haven't done it already, take a look at:

http://docs.astropy.org/en/latest/io/ascii/write.html
http://docs.astropy.org/en/latest/io/ascii/index.html#supported-formats


/David.




On 16 October 2013 11:19, braga <Vittorio.Braga at roma2.infn.it> wrote:

> Dear all
>
> I am not only new to Astropy but I'm totally new to python itself
>
> I need to read a csv table and rewrite it as an ipac table. I do this
> with astropy 0.24 ...
>
> zaamus at zaamuspc:~/Documenti/Dottorato/RRLyr/temp$ python -V
> Python 2.7.2
> zaamus at zaamuspc:~/Documenti/Dottorato/RRLyr/temp$ sudo python
> [sudo] password for zaamus:
> Python 2.7.2+ (default, Oct  4 2011, 20:03:08)
> [GCC 4.6.1] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from astropy.io import ascii
> >>> rdr=ascii.get_reader(Reader=ascii.Basic)
> >>> rdr.header.splitter.delimiter=','
> >>> rdr.data.splitter.delimiter=','
> >>> t1=ascii.read('match_2MASS+nomi')
> >>> t2=ascii.read('RRLyr_PLZK.dat')
>
> all is nice until here and I also manage to write to file in a plain
> ascii format
>
> >>> ascii.write(t2,'RRLyr_PLZK.dat_2')
>
> Fine. But if I do...
>
> >>> ascii.write(t2,'RRLyr_PLZK.dat_2',format='ipac')
> ERROR: TypeError: __init__() got an unexpected keyword argument
> 'format' [astropy.io.ascii.core]
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/ascii/ui.py",
> line 277, in write
>      writer = get_writer(Writer=Writer, **kwargs)
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/ascii/ui.py",
> line 244, in get_writer
>      writer = core._get_writer(Writer, **kwargs)
>    File
> "/usr/local/lib/python2.7/dist-packages/astropy/io/ascii/core.py", line
> 1015, in _get_writer
>      writer = Writer(**writer_kwargs)
> TypeError: __init__() got an unexpected keyword argument 'format'
>
> Same thing with format='latex'
> Also trying to write to sys.stdout (after importing sys) works only
> with no format specification
>
> I've also tried to
>
> >>> from astropy.io.ascii import ipac
> >>> ipac.write(t2,'RRLyr_PLZK.dat_2')
> ERROR: AttributeError: 'module' object has no attribute 'write'
> [unknown]
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> AttributeError: 'module' object has no attribute 'write'
>
> >>> from astropy.table import Table
> >>> t3=Table.read('match_2MASS+nomi',format='ascii')
> >>> Table.write(t3,'match_2MASS+nomi_2',format='ascii')
>
> fine, again it works...
> then I try
>
> >>> Table.write(t3,'match_2MASS+nomi_2',format='ascii.ipac')
> ERROR: Exception: No writer defined for format 'ascii.ipac' and class
> 'Table' [astropy.io.registry]
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/registry.py",
> line 200, in write
>      writer = get_writer(format, data.__class__)
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/registry.py",
> line 138, in get_writer
>      '{1!r}'.format(data_format, data_class.__name__))
> Exception: No writer defined for format 'ascii.ipac' and class 'Table'
> >>> Table.write(t3,'match_2MASS+nomi_2',format='ipac')
> ERROR: Exception: No writer defined for format 'ipac' and class 'Table'
> [astropy.io.registry]
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/registry.py",
> line 200, in write
>      writer = get_writer(format, data.__class__)
>    File "/usr/local/lib/python2.7/dist-packages/astropy/io/registry.py",
> line 138, in get_writer
>      '{1!r}'.format(data_format, data_class.__name__))
> Exception: No writer defined for format 'ipac' and class 'Table'
>
> Am I missing something? Am I not importing something?
>
> Thank you, Vittorio
>
> --
> Vittorio Francesco Braga
> PhD student in Tor Vergata University of Rome
> Mobile: +393203753307, Office (PhD room): +390672594868
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> SciPy-User at scipy.org
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>
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