column format transformation without internal astropy

Author: volodymyrss

astroquery/heasarc/core.py

@@ -2,7 +2,6 @@
 
 import warnings
 from six import StringIO, BytesIO
-from astropy.io.fits.column import _AsciiColumnFormat
 from astropy.table import Table
 from astropy.io import fits
 from astropy import coordinates
@@ -183,13 +182,12 @@ def _old_w3query_fallback(self, content):
             if c.disp is not None:
                 c.format = c.disp
             else:
-                c.format = _AsciiColumnFormat(str(c.format).replace("I", "A"))
+                c.format = str(c.format).replace("I", "A")
 
         I = BytesIO()
-
         f.writeto(I)
         I.seek(0)
-
+        
         return Table.read(I)
 
     def _fallback(self, text):

astroquery/heasarc/tests/test_heasarc_remote_isdc.py

@@ -128,6 +128,11 @@ def test_ra_validity(self):
 
         assert table_isdc['SCW_ID'] == table_heasarc['SCW_ID']
 
+        assert 'RA' in table_heasarc.columns
+        assert 'RA_X' in table_isdc.columns
+
+        assert abs(float(table_isdc['RA_X'][0]) - float(table_heasarc['RA'][0])) < 0.0001
+
     def test_basic_example(self):
         mission = 'integral_rev3_scw'
         object_name = '3c273'