New hyperleda service 298

astroquery/hyperleda/__init__.py

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+# Licensed under a 3-clause BSD style license - see LICENSE.rst
+
+"""
+HyperLEDA Query Tool
+-------------------
+
+A tool to query HyperLEDA http://leda.univ-lyon1.fr/
+
+:author: Iskren Y. Georgiev ([email protected])
+"""
+
+from astropy import config as _config
+
+
+class Conf(_config.ConfigNamespace):
+    """
+    Configuration parameters for `astroquery.hyperleda`.
+    """
+    server = _config.ConfigItem(
+        ['http://leda.univ-lyon1.fr/'],
+        'Base URL for HyperLeda http requests'
+        )
+
+    timeout = _config.ConfigItem(
+        30,
+        'Time timeout for the HyperLeda query.'
+        )
+
+
+conf = Conf()
+
+from .core import hyperleda, HyperLEDAClass
+
+__all__ = ['hyperleda', 'HyperLEDAClass',
+           'Conf', 'conf',
+           ]

astroquery/hyperleda/core.py

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+# Licensed under a 3-clause BSD style license - see LICENSE.rst
+
+__author__ = "Iskren Y. Georgiev"
+__author_email__ = "[email protected]"
+
+# Based on: https://astroquery.readthedocs.io/en/latest/template.html
+
+# Imports organized as shown below
+
+# 1. local imports relative imports
+# all Query classes should inherit from BaseQuery.
+from ..query import BaseQuery
+# has common functions required by most modules
+from ..utils import commons
+# prepend_docstr is a way to copy docstrings between methods
+from ..utils import prepend_docstr_nosections
+# async_to_sync generates the relevant query tools from _async methods
+from ..utils import async_to_sync
+from ..utils.class_or_instance import class_or_instance
+# import configurable items declared in __init__.py
+from . import conf
+
+# 2. standard library imports
+
+# 3. third party imports
+import astropy.units as u
+import astropy.coordinates as coord
+import astropy.io.votable as votable
+from astropy.table import Table, vstack
+from astropy.io import fits
+
+# export all the public classes and methods
+__all__ = ['hyperleda', 'HyperLEDAClass']
+
+# declare global variables and constants if any
+
+# Begin main class
+# Should be decorated with the async_to_sync imported previously
+
+
+@async_to_sync
+class HyperLEDAClass(BaseQuery):
+
+    """
+    Base class for querying data from the HyperLEDA database.
+
+    http://leda.univ-lyon1.fr
+
+    """
+
+    URL = conf.server
+    TIMEOUT = conf.timeout
+    # The URL with the table of the main object properties
+    URL_PROPERTIES = URL + '/leda/meandata.html'
+    URL_HTTP_REQUEST = URL + '/fG.cgi'
+
+    @class_or_instance
+    def get_properties(self):
+        """
+
+        Get the available object properties in the HyperLEDA database.
+        (See http://leda.univ-lyon1.fr/leda/meandata.html)
+
+        Returns an `~astropy.table.Table` object.
+
+        Returns
+        -------
+
+        prop_tbl : An `~astropy.table.Table` object with the available object
+        properties in HyperLEDA
+
+        Example
+        --------
+        >>> from astroquery.hyperleda import hyperleda
+        >>>
+        >>> properties_tbl = hyperleda.get_properties()
+        >>> properties_tbl.pprint_all()
+
+        """
+
+        url_prop = self.URL_PROPERTIES
+        response = self._request("GET", url_prop)
+        prop_tbl = self._parse_result(response)
+
+        return prop_tbl
+
+    def _perp_param_lst(self, param_lst):
+
+        # Prepare the parameter's list
+        # These params are no longer in the leda tables
+        for param in ['numtype', 'hptr', 'logavmm', 'e_logavmm']:
+            if param in param_lst:
+                param_lst.remove(param)
+
+        param_str = str(param_lst)
+        param_str = param_str[2:param_str.rfind('\'')]
+        param_str = param_str.replace('\', \'', ',')
+        return param_str
+
+    @class_or_instance
+    def query_object(self, obj_name, properties='all'):
+        """
+
+        Query an object from the HyperLEDA database.
+
+        Returns the object properties in an `~astropy.table.Table` object.
+
+        Example
+        --------
+        >>> from astroquery.hyperleda import hyperleda
+        >>> result_table = hyperleda.query_object(obj_name = 'UGC12591',
+                                           properties = 'objname,type,logr25,
+                                           btc,v,modbest,al2000,de2000,
+                                           celposJ(pgc)')
+        >>> result_table.pprint()
+
+        Parameters
+        ----------
+        obj_name : str
+
+            Object ID recognizable by HyperLEDA or SIMBAD
+
+        properties : str, or comma separated strings. Default: 'all'
+
+            The full list of properties in HyperLEDA is available at
+            http://leda.univ-lyon1.fr/leda/meandata.html
+            or via
+            hyperleda.get_properties().pprint_all()
+
+        Returns
+        -------
+
+        Table : An `~astropy.table.Table` object with the object properties
+            from HyperLEDA
+
+        """
+
+        if properties == 'all':
+            prop_tbl = self.get_properties()
+            param_lst = prop_tbl['field'].data.tolist()
+            param_str = self._perp_param_lst(param_lst)
+        else:
+            param_str = properties
+
+        url_http_request = self.URL_HTTP_REQUEST
+
+        ls_SQL_search = "objname = objname('{:}')".format(obj_name)
+
+        request_payload = dict(n='meandata', c='o', of='1,leda,simbad',
+                               nra='l', nakd='1',
+                               d='{:}'.format(param_str),
+                               sql='{:}'.format(ls_SQL_search), ob='',
+                               a='csv[|]')
+        response = self._request("GET", url_http_request,
+                                 params=request_payload)
+        sql_result_tbl = Table.read(response.url, format='ascii', delimiter='|')
+
+        return sql_result_tbl
+
+    @class_or_instance
+    def query_sql(self, search, properties='all'):
+        """
+
+        Perform SQL search in the HyperLEDA database.
+        (See http://leda.univ-lyon1.fr/fullsql.html)
+
+        Returns an `~astropy.table.Table` object with the results from the
+        search containing the object properties.
+
+        Parameters
+        ----------
+        search : str
+
+            A string containing a valid SQL WHERE clause.
+
+        properties : str, or comma separated strings. Default: 'all'
+
+            The full list of properties in HyperLEDA is available at
+            http://leda.univ-lyon1.fr/leda/meandata.html
+            or via
+            hyperleda.get_properties().pprint_all()
+
+        Returns
+        -------
+
+        Table : An `~astropy.table.Table` object with the object properties from
+        HyperLEDA
+
+        Example
+        --------
+        >>> from astroquery.hyperleda import hyperleda
+        >>> hl = hyperleda()
+        >>> sql_tbl = hl.query_sql(search = "(mod0<=27 and t>=-3 and t<=0 and
+                                              type='S0') or (mod0<=27 and t>=-3
+                                              and t<=0 and type='S0-a')",
+                                        properties = 'objname,type,logr25,btc,v,
+                                            modbest,al2000,de2000,hl_names(pgc),
+                                            celposJ(pgc)')
+        >>> result_table.pprint()
+        """
+
+        if properties == 'all':
+            prop_tbl = self.get_properties()
+            param_lst = prop_tbl['field'].data.tolist()
+            param_str = self._perp_param_lst(param_lst)
+        else:
+            param_str = properties
+
+        url_http_request = self.URL_HTTP_REQUEST
+
+        ls_SQL_search = search
+
+        request_payload = dict(n='meandata', c='o', of='1,leda,simbad',
+                               nra='l', nakd='1',
+                               d='{:}'.format(param_str),
+                               sql='{:}'.format(ls_SQL_search), ob='',
+                               a='csv[|]')
+        response = self._request("GET", url_http_request,
+                                 params=request_payload)
+        sql_result_tbl = Table.read(response.url, format='ascii', delimiter='|')
+
+        return sql_result_tbl
+
+    def _parse_result(self, response, verbose=False):
+        # if verbose is False then suppress any VOTable related warnings
+        if not verbose:
+            commons.suppress_vo_warnings()
+        # try to parse the result into an astropy.Table, else
+        # return the raw result with an informative error message.
+        try:
+            # do something with regex to get the result into
+            # astropy.Table form. return the Table.
+
+            lind = response.text.find('/fG.cgi')
+            rind = lind + response.text[lind:].find('"')
+            ls_url_props_src = response.text[lind:rind]
+            ls_url_props = self.URL + ls_url_props_src
+
+            # Get the main table
+            prop_tbl = Table.read(ls_url_props, format='ascii.html')
+            prop_tbl.rename_columns(prop_tbl.colnames,
+                                    ['field', 'type', 'units', 'description'])
+
+            # Get the table with the available SQL functions
+            sql_func_tbl = Table.read(response.url, format='ascii.html',
+                                      htmldict={'table_id': 2})
+
+            sql_func_tbl.add_column(col='--', name='units', index=2)
+            sql_func_tbl.rename_columns(sql_func_tbl.colnames,
+                                        ['field', 'type', 'units', 'description'])
+            prop_tbl = vstack([prop_tbl, sql_func_tbl])
+        except ValueError:
+            # catch common errors here, but never use bare excepts
+            # return raw result/ handle in some way
+            pass
+
+        return prop_tbl
+
+
+# the default tool for users to interact with is an instance of the Class
+hyperleda = HyperLEDAClass()
+
+# once your class is done, tests should be written
+# See ./tests for examples on this
+
+# Next you should write the docs in astroquery/docs/module_name
+# using Sphinx.