Merge pull request #550 from duytnguyendtn/time_nan

Check for nan dateobs before converting to Time

CHANGES.rst

@@ -1,3 +1,13 @@
+1.5.2 (unreleased)
+==================
+
+Bug Fixes
+---------
+
+- Avoid Astropy Time error for SIAResult.dateobs when
+  VOX:Image_MJDateObs or ssa:DataID.Date is nan. [#550]
+
+
 1.5.1 (2024-02-21)
 ==================
 

pyvo/dal/sia.py

@@ -35,6 +35,7 @@
 from astropy.coordinates import SkyCoord
 from astropy.time import Time
 from astropy.units import Quantity, Unit
+import numpy as np
 
 from .query import DALResults, DALQuery, DALService, Record
 from .mimetype import mime2extension
@@ -702,10 +703,13 @@ def dateobs(self):
         as an astropy.time.Time instance
         """
         dateobs = self.getbyucd("VOX:Image_MJDateObs")
-        if dateobs:
-            return Time(dateobs, format="mjd")
-        else:
-            return None
+        try:
+            if not dateobs or np.isnan(dateobs):
+                return None
+        except TypeError:
+            # np.isnan can only check floats. If can't check for nan, pass it along
+            pass
+        return Time(dateobs, format="mjd")
 
     @property
     def naxes(self):

pyvo/dal/ssa.py

@@ -39,6 +39,7 @@
 from astropy.units import spectral as spectral_equivalencies
 from astropy.io.votable.tree import Field
 from astropy.table import Table
+import numpy as np
 
 from .query import DALResults, DALQuery, DALService, Record
 from .mimetype import mime2extension
@@ -698,10 +699,13 @@ def dateobs(self):
         observational data that went into the spectrum
         """
         dateobs = self.getbyutype("ssa:DataID.Date", decode=True)
-        if dateobs:
-            return Time(dateobs, format="iso")
-        else:
-            return None
+        try:
+            if not dateobs or np.isnan(dateobs):
+                return None
+        except TypeError:
+            # np.isnan can only check floats. If can't check for nan, pass it along
+            pass
+        return Time(dateobs, format="iso")
 
     @property
     def instr(self):

pyvo/dal/tests/data/sia/dataset.xml

@@ -58,6 +58,20 @@
       <TD>5.2e-07</TD>
       <TD>0.000403806 0.000406123</TD>
      </TR>
+     <TR>
+      <TD>This should not be the dataurl</TD>
+      <TD>http://example.com/querydata/image.fits</TD>
+      <TD>image/fits</TD>
+      <TD>153280</TD>
+      <TD/> <!-- Empty VOX:Image_MJDateObs field -->
+      <TD>Test</TD>
+      <TD>288.95078924817</TD>
+      <TD>15.0322239971381</TD>
+      <TD>Test Observation</TD>
+      <TD>3.8e-07</TD>
+      <TD>5.2e-07</TD>
+      <TD>0.000403806 0.000406123</TD>
+     </TR>
     </TABLEDATA>
    </DATA>
   </TABLE>

pyvo/dal/tests/data/ssa/result.xml

@@ -209,6 +209,7 @@
 <TR><TD>1.0976232720625123E-25</TD><TD>http://vaosa-vm1.aoc.nrao.edu/ivoa-dal/JhuSsapServlet?REQUEST=getData&amp;FORMAT=votable&amp;PubDID=ivo%3A%2F%2Fjhu%2Fsdss%2Fdr6%2Fspec%2F2.5%2380443408220422144</TD><TD>application/x-votable+xml</TD><TD>SPECTRUM-1.0</TD><TD>SPECTRUM</TD><TD>4000</TD><TD>s</TD><TD>A</TD><TD>10**(-17) erg s**(-1) cm**(-2) A**(-1)</TD><TD>SDSS J120022.76+004741.46 GALAXY</TD><TD>sdss</TD><TD>SDSS DR6</TD><TD>ivo://sdss/dr6/spec/2_5/#80443408220422144</TD><TD>2001-01-21 11:23:50Z</TD><TD>6.2.5</TD><TD>ivo://sdss/dr6/spec/2_5/#80443408220422144</TD><TD>SDSS 2.5-M SPEC2 v4_5</TD><TD>OPTICAL</TD><TD>SURVEY</TD><TD>ARCHIVAL</TD><TD>ELTE VO</TD><TD>ivo://jhu/sdss/dr6/spec/2.5#80443408220422144</TD><TD>PUBLIC</TD><TD>180.094830 0.794849</TD><TD>SDSS J120022.76+004741.46</TD><TD>GALAXY</TD><TD>0.139797</TD><TD>0</TD><TD>FK5</TD><TD>2000</TD><TD>TAI</TD><TD>180.094830 0.794849</TD><TD></TD></TR>
 <TR><TD>8.441184510333563E-42</TD><TD>http://vaosa-vm1.aoc.nrao.edu/ivoa-dal/JhuSsapServlet?REQUEST=getData&amp;FORMAT=votable&amp;PubDID=ivo%3A%2F%2Fjhu%2Fsdss%2Fdr6%2Fspec%2F2.5%2380443407868100608</TD><TD>application/x-votable+xml</TD><TD>SPECTRUM-1.0</TD><TD>SPECTRUM</TD><TD>4000</TD><TD>s</TD><TD>A</TD><TD>10**(-17) erg s**(-1) cm**(-2) A**(-1)</TD><TD>SDSS J115918.12+005113.61 GALAXY</TD><TD>sdss</TD><TD>SDSS DR6</TD><TD>ivo://sdss/dr6/spec/2_5/#80443407868100608</TD><TD>2001-01-21 11:23:50Z</TD><TD>6.2.5</TD><TD>ivo://sdss/dr6/spec/2_5/#80443407868100608</TD><TD>SDSS 2.5-M SPEC2 v4_5</TD><TD>OPTICAL</TD><TD>SURVEY</TD><TD>ARCHIVAL</TD><TD>ELTE VO</TD><TD>ivo://jhu/sdss/dr6/spec/2.5#80443407868100608</TD><TD>PUBLIC</TD><TD>179.825520 0.853781</TD><TD>SDSS J115918.12+005113.61</TD><TD>GALAXY</TD><TD>0.0770442</TD><TD>0</TD><TD>FK5</TD><TD>2000</TD><TD>TAI</TD><TD>179.825520 0.853781</TD><TD></TD></TR>
 <TR><TD>8.441184510333563E-42</TD><TD>http://vaosa-vm1.aoc.nrao.edu/ivoa-dal/JhuSsapServlet?REQUEST=getData&amp;FORMAT=votable&amp;PubDID=ivo%3A%2F%2Fjhu%2Fsdss%2Fdr6%2Fspec%2F2.5%2380442261136998400</TD><TD>application/x-votable+xml</TD><TD>SPECTRUM-1.0</TD><TD>SPECTRUM</TD><TD>4000</TD><TD>s</TD><TD>A</TD><TD>10**(-17) erg s**(-1) cm**(-2) A**(-1)</TD><TD>SDSS J115918.12+005113.61 GALAXY</TD><TD>sdss</TD><TD>SDSS DR6</TD><TD>ivo://sdss/dr6/spec/2_5/#80442261136998400</TD><TD>2000-04-29 03:22:00Z</TD><TD>6.2.5</TD><TD>ivo://sdss/dr6/spec/2_5/#80442261136998400</TD><TD>SDSS 2.5-M SPEC2 v4_5</TD><TD>OPTICAL</TD><TD>SURVEY</TD><TD>ARCHIVAL</TD><TD>ELTE VO</TD><TD>ivo://jhu/sdss/dr6/spec/2.5#80442261136998400</TD><TD>PUBLIC</TD><TD>179.825520 0.853781</TD><TD>SDSS J115918.12+005113.61</TD><TD>GALAXY</TD><TD>0.0770941</TD><TD>0</TD><TD>FK5</TD><TD>2000</TD><TD>TAI</TD><TD>179.825520 0.853781</TD><TD></TD></TR>
+<TR><TD>8.441184510333563E-42</TD><TD>http://vaosa-vm1.aoc.nrao.edu/ivoa-dal/JhuSsapServlet?REQUEST=getData&amp;FORMAT=votable&amp;PubDID=ivo%3A%2F%2Fjhu%2Fsdss%2Fdr6%2Fspec%2F2.5%2380442261136998400</TD><TD>application/x-votable+xml</TD><TD>SPECTRUM-1.0</TD><TD>SPECTRUM</TD><TD>4000</TD><TD>s</TD><TD>A</TD><TD>10**(-17) erg s**(-1) cm**(-2) A**(-1)</TD><TD>SDSS J115918.12+005113.61 GALAXY</TD><TD>sdss</TD><TD>SDSS DR6</TD><TD>ivo://sdss/dr6/spec/2_5/#80442261136998400</TD><TD/><!-- Empty VOX:Image_MJDateObs field --><TD>6.2.5</TD><TD>ivo://sdss/dr6/spec/2_5/#80442261136998400</TD><TD>SDSS 2.5-M SPEC2 v4_5</TD><TD>OPTICAL</TD><TD>SURVEY</TD><TD>ARCHIVAL</TD><TD>ELTE VO</TD><TD>ivo://jhu/sdss/dr6/spec/2.5#80442261136998400</TD><TD>PUBLIC</TD><TD>179.825520 0.853781</TD><TD>SDSS J115918.12+005113.61</TD><TD>GALAXY</TD><TD>0.0770941</TD><TD>0</TD><TD>FK5</TD><TD>2000</TD><TD>TAI</TD><TD>179.825520 0.853781</TD><TD></TD></TR>
 </TABLEDATA>
 </DATA>
 </TABLE>

pyvo/dal/tests/test_sia.py

@@ -61,9 +61,15 @@ class TestSIAService:
     @pytest.mark.filterwarnings("ignore::astropy.io.votable.exceptions.W42")
     @pytest.mark.filterwarnings("ignore::astropy.io.votable.exceptions.W49")
     def test_search(self):
-        service = SIAService('http://example.com/sia')
+        description = "A SIA service."
+        url = 'http://example.com/sia'
+        service = SIAService(url, capability_description=description)
+        assert service.baseurl == url
+        assert service.capability_description == description
 
         results = service.search(pos=(288, 15))
         result = results[0]
 
         _test_result(result)
+
+        assert results[1].dateobs is None

pyvo/dal/tests/test_ssa.py

@@ -33,7 +33,7 @@ def callback(request, context):
 @pytest.mark.filterwarnings("ignore::astropy.io.votable.exceptions.W42")
 def test_search():
     results = search('http://example.com/ssa', pos=(0.0, 0.0), diameter=1.0)
-    assert len(results) == 35
+    assert len(results) == 36
 
 
 class TestSSAService:
@@ -44,4 +44,5 @@ def test_search(self):
 
         results = service.search(pos=(0.0, 0.0), diameter=1.0)
 
-        assert len(results) == 35
+        assert len(results) == 36
+        assert results[35].dateobs is None