codecov[bot]: # [Codecov](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=h1) Report
> Merging [#642](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=desc) into [master](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/commit/ad4ba0e02e4f4049ba460e90f34372467d9edc91?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642/graphs/tree.svg?width=650&token=4QykcCeB1H&height=150&src=pr)](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master     #642      +/-   ##
==========================================
+ Coverage   98.88%   98.88%   +<.01%     
==========================================
  Files          20       20              
  Lines        8142     8143       +1     
==========================================
+ Hits         8051     8052       +1     
  Misses         91       91
```


| [Impacted Files](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pyuvdata/uvdata.py](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642/diff?src=pr&el=tree#diff-cHl1dmRhdGEvdXZkYXRhLnB5) | `100% <ø> (ø)` | :arrow_up: |
| [pyuvdata/utils.py](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642/diff?src=pr&el=tree#diff-cHl1dmRhdGEvdXRpbHMucHk=) | `100% <100%> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=footer). Last update [ad4ba0e...c2d22ad](https://codecov.io/gh/RadioAstronomySoftwareGroup/pyuvdata/pull/642?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).

mkolopanis: @jpober this should fix the vectorized baselines issue if you want to take a look.
bhazelton: what about `antnums_to_baseline`? Does it accept array-like inputs? 
mkolopanis: ah it does already. I should update the docs to reflect this though since it is closely related to this PR. which is inadvertently tested in the new test I added too.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f581386f..0d42d581 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,11 +2,14 @@
 All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
+- `utils.uvcalibrate` flag propagation bug fix
+- `UVCal.ant2ind` indexing bug fix
 - `UVCal.get_*` methods for accessing data arrays with antenna-polarization keys
 - `utils.uvcalibrate` for automated calibration of `UVData` by `UVCal`
 
 ### Fixed
 - Fixed a bug in select that caused bls and antenna_names/numbers to be or'ed rather than and'ed together.
+- Fixed a bug where `baseline_to_antnums` could accept a numpy array as input but not other array_like objects.
 
 ## [1.4.0] - 2019-05-23
 
diff --git a/pyuvdata/utils.py b/pyuvdata/utils.py
index 3a669b19..55394e44 100644
--- a/pyuvdata/utils.py
+++ b/pyuvdata/utils.py
@@ -464,12 +464,11 @@ def uvcalibrate(uvdata, uvcal, inplace=True, prop_flags=True, flag_missing=True,
                 gain[mask] = 1.0
                 uvdata.flag_array[blt_inds, 0, :, pol_ind] += mask
 
-            else:
-                # apply to data
-                if uvcal.gain_convention == 'multiply':
-                    uvdata.data_array[blt_inds, 0, :, pol_ind] *= gain
-                elif uvcal.gain_convention == 'divide':
-                    uvdata.data_array[blt_inds, 0, :, pol_ind] /= gain
+            # apply to data
+            if uvcal.gain_convention == 'multiply':
+                uvdata.data_array[blt_inds, 0, :, pol_ind] *= gain
+            elif uvcal.gain_convention == 'divide':
+                uvdata.data_array[blt_inds, 0, :, pol_ind] /= gain
 
     # update history
     uvdata.history += "\nCalibrated with pyuvdata.utils.uvcalibrate."
@@ -988,16 +987,25 @@ def baseline_to_antnums(baseline, Nants_telescope):
     """
     Get the antenna numbers corresponding to a given baseline number.
 
-    Args:
-        baseline: integer baseline number
-        Nant_telescope: integer number of antennas
+    Parameters
+    ----------
+    baseline : int or array_like of ints
+        baseline number
+    Nant_telescope : int
+        number of antennas
 
-    Returns:
-        tuple with the two antenna numbers corresponding to the baseline.
+    Returns
+    -------
+    int or array_like of int
+        first antenna number(s)
+    int or array_like of int
+        second antenna number(s)
     """
     if Nants_telescope > 2048:
         raise Exception('error Nants={Nants}>2048 not '
                         'supported'.format(Nants=Nants_telescope))
+
+    baseline = np.asarray(baseline, dtype=np.int64)
     if np.min(baseline) > 2**16:
         ant2 = (baseline - 2**16) % 2048 - 1
         ant1 = (baseline - 2**16 - (ant2 + 1)) / 2048 - 1
@@ -1011,16 +1019,23 @@ def antnums_to_baseline(ant1, ant2, Nants_telescope, attempt256=False):
     """
     Get the baseline number corresponding to two given antenna numbers.
 
-    Args:
-        ant1: first antenna number (integer)
-        ant2: second antenna number (integer)
-        Nant_telescope: integer number of antennas
-        attempt256: Option to try to use the older 256 standard used in
-            many uvfits files (will use 2048 standard if there are more
-            than 256 antennas). Default is False.
+    Parameters
+    ----------
+    ant1 : int or array_like of int
+        first antenna number
+    ant2 : int or array_like of int
+        second antenna number
+    Nant_telescope : int
+        number of antennas
+    attempt256 : bool
+        Option to try to use the older 256 standard used in
+        many uvfits files (will use 2048 standard if there are more
+        than 256 antennas). Default is False.
 
-    Returns:
-        integer baseline number corresponding to the two antenna numbers.
+    Returns
+    -------
+    int or array of int
+        baseline number corresponding to the two antenna numbers.
     """
     ant1, ant2 = np.int64((ant1, ant2))
     if Nants_telescope is not None and Nants_telescope > 2048:
diff --git a/pyuvdata/uvcal.py b/pyuvdata/uvcal.py
index 41f51b17..6f86fa83 100644
--- a/pyuvdata/uvcal.py
+++ b/pyuvdata/uvcal.py
@@ -738,7 +738,7 @@ class UVCal(UVBase):
         if not self._has_key(antnum=antnum):
             raise ValueError("{} not found in ant_array".format(antnum))
 
-        return np.argmin(self.ant_array - antnum)
+        return np.argmin(np.abs(self.ant_array - antnum))
 
     def jpol2ind(self, jpol):
         """
diff --git a/pyuvdata/uvdata.py b/pyuvdata/uvdata.py
index 934c71eb..7c2369e8 100644
--- a/pyuvdata/uvdata.py
+++ b/pyuvdata/uvdata.py
@@ -577,15 +577,15 @@ class UVData(UVBase):
 
         Parameters
         ----------
-        baseline : int
+        baseline : int or array_like of int
             baseline number
 
         Returns
         -------
-        int
-            first antenna number
-        int
-            second antenna number
+        int or array_like of int
+            first antenna number(s)
+        int or array_like of int
+            second antenna number(s)
         """
         return uvutils.baseline_to_antnums(baseline, self.Nants_telescope)
 
@@ -595,9 +595,9 @@ class UVData(UVBase):
 
         Parameters
         ----------
-        ant1 : int
+        ant1 : int or array_like of int
             first antenna number
-        ant2 : int
+        ant2 : int or array_like of int
             second antenna number
         attempt256 : bool
             Option to try to use the older 256 standard used in many uvfits files
@@ -605,7 +605,7 @@ class UVData(UVBase):
 
         Returns
         -------
-        int
+        int or array of int
             baseline number corresponding to the two antenna numbers.
         """
         return uvutils.antnums_to_baseline(ant1, ant2, self.Nants_telescope, attempt256=attempt256)

baselines_to_antums is not vectorized
Seems you can't give a list of baseline numbers and get a list of antenna pair tuples.  That would be useful.
diff --git a/pyuvdata/tests/test_utils.py b/pyuvdata/tests/test_utils.py
index dd405843..01ce1e4e 100644
--- a/pyuvdata/tests/test_utils.py
+++ b/pyuvdata/tests/test_utils.py
@@ -948,7 +948,7 @@ def test_uvcalibrate_apply_gains():
 
     # division calibrate
     uvc.gain_convention = 'divide'
-    uvdcal = uvutils.uvcalibrate(uvd, uvc, prop_flags=False, flag_missing=False, inplace=False)
+    uvdcal = uvutils.uvcalibrate(uvd, uvc, prop_flags=True, flag_missing=False, inplace=False)
     np.testing.assert_array_almost_equal(uvdcal.get_data(key), uvd.get_data(key) / (uvc.get_gains(ant1) * uvc.get_gains(ant2).conj()).T)
 
     # multiplication calibrate
diff --git a/pyuvdata/tests/test_uvcal.py b/pyuvdata/tests/test_uvcal.py
index c4392f22..5f8b14bc 100644
--- a/pyuvdata/tests/test_uvcal.py
+++ b/pyuvdata/tests/test_uvcal.py
@@ -1442,17 +1442,19 @@ def test_uvcal_get_methods():
     uvc = UVCal()
     uvc.read_calfits(os.path.join(DATA_PATH, 'zen.2457698.40355.xx.gain.calfits'))
 
-    # test get methods
-    key = (9, 'Jxx')
+    # test get methods: add in a known value and make sure it is returned
+    key = (10, 'Jxx')
+    uvc.gain_array[1] = 0.0
     d, f, q = uvc.get_gains(key), uvc.get_flags(key), uvc.get_quality(key)
 
     # test shapes
+    assert np.all(np.isclose(d, 0.0))
     assert d.shape == (uvc.Nfreqs, uvc.Ntimes)
     assert f.shape == (uvc.Nfreqs, uvc.Ntimes)
     assert q.shape == (uvc.Nfreqs, uvc.Ntimes)
 
     # test against by-hand indexing
-    np.testing.assert_array_almost_equal(d, uvc.gain_array[uvc.ant_array.tolist().index(9), 0, :, :, uvc.jones_array.tolist().index(-5)])
+    np.testing.assert_array_almost_equal(d, uvc.gain_array[uvc.ant_array.tolist().index(10), 0, :, :, uvc.jones_array.tolist().index(-5)])
 
     # test variable key input
     d2 = uvc.get_gains(*key)
@@ -1461,23 +1463,23 @@ def test_uvcal_get_methods():
     np.testing.assert_array_almost_equal(d, d2)
     d2 = uvc.get_gains(key[:1])
     np.testing.assert_array_almost_equal(d, d2)
-    d2 = uvc.get_gains(9, -5)
+    d2 = uvc.get_gains(10, -5)
     np.testing.assert_array_almost_equal(d, d2)
-    d2 = uvc.get_gains(9, 'x')
+    d2 = uvc.get_gains(10, 'x')
     np.testing.assert_array_almost_equal(d, d2)
 
     # check has_key
-    assert uvc._has_key(antnum=9)
+    assert uvc._has_key(antnum=10)
     assert uvc._has_key(jpol='Jxx')
-    assert uvc._has_key(antnum=9, jpol='Jxx')
-    assert not uvc._has_key(antnum=9, jpol='Jyy')
+    assert uvc._has_key(antnum=10, jpol='Jxx')
+    assert not uvc._has_key(antnum=10, jpol='Jyy')
     assert not uvc._has_key(antnum=101, jpol='Jxx')
 
     # test exceptions
     pytest.raises(ValueError, uvc.get_gains, 1)
-    pytest.raises(ValueError, uvc.get_gains, (9, 'Jyy'))
+    pytest.raises(ValueError, uvc.get_gains, (10, 'Jyy'))
     uvc.cal_type = 'delay'
-    pytest.raises(ValueError, uvc.get_gains, 9)
+    pytest.raises(ValueError, uvc.get_gains, 10)
 
 
 def test_deprecated_x_orientation():
diff --git a/pyuvdata/tests/test_uvdata.py b/pyuvdata/tests/test_uvdata.py
index 77b63b9e..1ef3a22b 100644
--- a/pyuvdata/tests/test_uvdata.py
+++ b/pyuvdata/tests/test_uvdata.py
@@ -297,7 +297,10 @@ def uvdata_baseline():
 def test_baseline_to_antnums(uvdata_baseline):
     """Test baseline to antnum conversion for 256 & larger conventions."""
     assert uvdata_baseline.uv_object.baseline_to_antnums(67585) == (0, 0)
-    pytest.raises(Exception, uvdata_baseline.uv_object2.baseline_to_antnums, 67585)
+    with pytest.raises(Exception) as cm:
+        uvdata_baseline.uv_object2.baseline_to_antnums(67585)
+    assert str(cm.value).startswith('error Nants={Nants}>2048'
+                                    ' not supported'.format(Nants=uvdata_baseline.uv_object2.Nants_telescope))
 
     ant_pairs = [(10, 20), (280, 310)]
     for pair in ant_pairs:
@@ -313,6 +316,18 @@ def test_baseline_to_antnums(uvdata_baseline):
         assert pair == ant_pair_out
 
 
+def test_baseline_to_antnums_vectorized(uvdata_baseline):
+    """Test vectorized antnum to baseline conversion."""
+    ant_1 = [10, 280]
+    ant_2 = [20, 310]
+    baseline_array = uvdata_baseline.uv_object.antnums_to_baseline(ant_1, ant_2)
+    assert np.array_equal(baseline_array, [88085, 641335])
+    ant_1_out, ant_2_out = uvdata_baseline.uv_object.baseline_to_antnums(baseline_array.tolist())
+    print('out:', ant_1_out, ant_2_out)
+    assert np.array_equal(ant_1, ant_1_out)
+    assert np.array_equal(ant_2, ant_2_out)
+
+
 def test_antnums_to_baselines(uvdata_baseline):
     """Test antums to baseline conversion for 256 & larger conventions."""
     assert uvdata_baseline.uv_object.antnums_to_baseline(0, 0) == 67585

pip install -e .
parse_log_pytest
requirements.txt
pytest pytest-cov pytest-xdist pytest-mock pytest-asyncio pypandoc
apt-get update apt-get install -y gcc g++
3.6
docs/requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
alabaster==0.7.13
astropy==4.1
attrs==22.2.0
Babel==2.11.0
certifi==2021.5.30
charset-normalizer==2.0.12
coverage==6.2
docutils==0.18.1
execnet==1.9.0
idna==3.10
imagesize==1.4.1
importlib-metadata==4.8.3
iniconfig==1.1.1
Jinja2==3.0.3
MarkupSafe==2.0.1
numpy==1.19.5
packaging==21.3
pluggy==1.0.0
py==1.11.0
Pygments==2.14.0
pypandoc==1.14
pyparsing==3.1.4
pytest==7.0.1
pytest-asyncio==0.16.0
pytest-cov==4.0.0
pytest-mock==3.6.1
pytest-xdist==3.0.2
pytz==2025.2
-e git+https://github.com/RadioAstronomySoftwareGroup/pyuvdata.git@ad4ba0e02e4f4049ba460e90f34372467d9edc91#egg=pyuvdata
requests==2.27.1
scipy==1.5.4
six==1.17.0
snowballstemmer==2.2.0
Sphinx==5.3.0
sphinxcontrib-applehelp==1.0.2
sphinxcontrib-devhelp==1.0.2
sphinxcontrib-htmlhelp==2.0.0
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.3
sphinxcontrib-serializinghtml==1.1.5
tomli==1.2.3
typing_extensions==4.1.1
urllib3==1.26.20
zipp==3.6.0

name: pyuvdata
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - alabaster==0.7.13
      - astropy==4.1
      - attrs==22.2.0
      - babel==2.11.0
      - charset-normalizer==2.0.12
      - coverage==6.2
      - docutils==0.18.1
      - execnet==1.9.0
      - idna==3.10
      - imagesize==1.4.1
      - importlib-metadata==4.8.3
      - iniconfig==1.1.1
      - jinja2==3.0.3
      - markupsafe==2.0.1
      - numpy==1.19.5
      - packaging==21.3
      - pluggy==1.0.0
      - py==1.11.0
      - pygments==2.14.0
      - pypandoc==1.14
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytest-asyncio==0.16.0
      - pytest-cov==4.0.0
      - pytest-mock==3.6.1
      - pytest-xdist==3.0.2
      - pytz==2025.2
      - requests==2.27.1
      - scipy==1.5.4
      - six==1.17.0
      - snowballstemmer==2.2.0
      - sphinx==5.3.0
      - sphinxcontrib-applehelp==1.0.2
      - sphinxcontrib-devhelp==1.0.2
      - sphinxcontrib-htmlhelp==2.0.0
      - sphinxcontrib-jsmath==1.0.1
      - sphinxcontrib-qthelp==1.0.3
      - sphinxcontrib-serializinghtml==1.1.5
      - tomli==1.2.3
      - typing-extensions==4.1.1
      - urllib3==1.26.20
      - zipp==3.6.0
prefix: /opt/conda/envs/pyuvdata

pyuvdata/tests/test_utils.py::test_uvcalibrate_apply_gains pyuvdata/tests/test_uvcal.py::test_uvcal_get_methods pyuvdata/tests/test_uvdata.py::test_baseline_to_antnums_vectorized
pyuvdata/tests/test_uvdata.py::test_HERA_diameters pyuvdata/tests/test_uvdata.py::test_generic_read pyuvdata/tests/test_uvdata.py::test_phase_unphaseHERA pyuvdata/tests/test_uvdata.py::test_set_phase_unknown pyuvdata/tests/test_uvdata.py::test_select_blts pyuvdata/tests/test_uvdata.py::test_select_antennas pyuvdata/tests/test_uvdata.py::test_select_bls pyuvdata/tests/test_uvdata.py::test_select_times pyuvdata/tests/test_uvdata.py::test_select_frequencies pyuvdata/tests/test_uvdata.py::test_select_freq_chans pyuvdata/tests/test_uvdata.py::test_select_polarizations pyuvdata/tests/test_uvdata.py::test_select pyuvdata/tests/test_uvdata.py::test_select_not_inplace pyuvdata/tests/test_uvdata.py::test_conjugate_bls pyuvdata/tests/test_uvdata.py::test_reorder_pols pyuvdata/tests/test_uvdata.py::test_reorder_blts pyuvdata/tests/test_uvdata.py::test_add pyuvdata/tests/test_uvdata.py::test_add_drift pyuvdata/tests/test_uvdata.py::test_break_add pyuvdata/tests/test_uvdata.py::test_fast_concat pyuvdata/tests/test_uvdata.py::test_fast_concat_errors pyuvdata/tests/test_uvdata.py::test_key2inds pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols_fringe pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols_bl_fringe pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols_missing_data pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols_bls pyuvdata/tests/test_uvdata.py::test_key2inds_conj_all_pols_missing_data_bls pyuvdata/tests/test_uvdata.py::test_smart_slicing pyuvdata/tests/test_uvdata.py::test_get_data pyuvdata/tests/test_uvdata.py::test_get_flags pyuvdata/tests/test_uvdata.py::test_get_nsamples pyuvdata/tests/test_uvdata.py::test_antpair2ind pyuvdata/tests/test_uvdata.py::test_get_times pyuvdata/tests/test_uvdata.py::test_antpairpol_iter pyuvdata/tests/test_uvdata.py::test_get_ants pyuvdata/tests/test_uvdata.py::test_get_pols pyuvdata/tests/test_uvdata.py::test_get_pols_x_orientation pyuvdata/tests/test_uvdata.py::test_deprecated_x_orientation pyuvdata/tests/test_uvdata.py::test_get_feedpols pyuvdata/tests/test_uvdata.py::test_parse_ants pyuvdata/tests/test_uvdata.py::test_select_with_ant_str pyuvdata/tests/test_uvdata.py::test_set_uvws_from_antenna_pos pyuvdata/tests/test_uvdata.py::test_redundancy_contract_expand_nblts_not_nbls_times_ntimes pyuvdata/tests/test_uvdata.py::test_redundancy_finder_when_nblts_not_nbls_times_ntimes pyuvdata/tests/test_uvdata.py::test_overlapping_data_add pyuvdata/tests/test_uvdata.py::test_lsts_from_time_with_only_unique
pyuvdata/tests/test_utils.py::test_XYZ_from_LatLonAlt pyuvdata/tests/test_utils.py::test_LatLonAlt_from_XYZ pyuvdata/tests/test_utils.py::test_ENU_tofrom_ECEF pyuvdata/tests/test_utils.py::test_mwa_ecef_conversion pyuvdata/tests/test_utils.py::test_phasing_funcs pyuvdata/tests/test_utils.py::test_pol_funcs pyuvdata/tests/test_utils.py::test_pol_funcs_x_orientation pyuvdata/tests/test_utils.py::test_jones_num_funcs pyuvdata/tests/test_utils.py::test_jones_num_funcs_x_orientation pyuvdata/tests/test_utils.py::test_conj_pol pyuvdata/tests/test_utils.py::test_deprecated_funcs pyuvdata/tests/test_utils.py::test_redundancy_finder pyuvdata/tests/test_utils.py::test_redundancy_conjugates pyuvdata/tests/test_utils.py::test_redundancy_finder_fully_redundant_array pyuvdata/tests/test_utils.py::test_reraise_context pyuvdata/tests/test_utils.py::test_str_to_bytes pyuvdata/tests/test_utils.py::test_bytes_to_str pyuvdata/tests/test_utils.py::test_reorder_conj_pols_non_list 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pyuvdata/utils.py pyuvdata/uvdata.py CHANGELOG.md pyuvdata/uvcal.py
pyuvdata/utils.py pyuvdata/uvdata.py CHANGELOG.md pyuvdata/uvcal.py