我正在使用AstroPy的Vizier Queries软件包通过Vizier目录搜索天文资源。运行代码后,我将获得一个TableList,其中包括目录列表。
opticalViz = Vizier(columns=['_RAJ2000', '_DEJ2000','B-V', 'Vmag', 'Bmag'],
keywords = ['optical'])
catalog_list = opticalViz.query_region(coord.SkyCoord('00 57 27.09 -73 25 14.4',
unit=(u.hourangle, u.deg)),
radius = Angle((0,0,6.3), unit = u.deg) )
print(catalog_list)
输出]
TableList with 18 tables: '0:I/221/smc' with 3 column(s) and 1 row(s) '1:I/252/out' with 4 column(s) and 1 row(s) '2:I/271/out' with 3 column(s) and 1 row(s) '3:I/284/out' with 3 column(s) and 1 row(s) '4:I/297/out' with 4 column(s) and 1 row(s) '5:I/305/out' with 4 column(s) and 1 row(s) '6:I/317/sample' with 3 column(s) and 1 row(s) '7:I/319/xpm' with 4 column(s) and 1 row(s) '8:I/320/spm4' with 4 column(s) and 1 row(s) '9:I/322A/out' with 4 column(s) and 1 row(s) '10:I/337/gaia' with 3 column(s) and 2 row(s) '11:I/339/hsoy' with 3 column(s) and 1 row(s) '12:I/345/gaia2' with 3 column(s) and 3 row(s) '13:II/236/smc' with 4 column(s) and 1 row(s) '14:II/336/apass9' with 5 column(s) and 1 row(s) '15:IV/38/tic' with 4 column(s) and 3 row(s) '16:J/A+A/586/A81/table5' with 5 column(s) and 1 row(s) '17:J/AJ/123/855/table1' with 4 column(s) and 3 row(s)
这非常类似于字典,其键是目录名,值是表。我希望能够通过键名删除特定的目录/表。但是,当我尝试使用
del catalog_list['I/345/gaia2']
时,出现错误,指出列表索引必须是数字。
任何人都可以了解TableList的确切含义以及如何从中删除特定元素吗?
我正在使用AstroPy的Vizier Queries软件包通过Vizier目录搜索天文资源。运行代码后,我将获得一个TableList,其中包括目录列表。 OpticalViz = ...
TableLists
是OrderedDict的包装器。它们在astroquery中用于最小化表示从服务返回的表。