issues: 2142982259

What happened?

UMR-LOPS has introduced XSAR a library to work with RCM dataset. when working with the following code import xsar import geoviews as gv import holoviews as hv import geoviews.feature as gf hv.extension('bokeh') path = xsar.get_test_file('RCM1_OK1050603_PK1050605_1_SC50MB_20200214_115905_HH_HV_Z010') meta = xsar.RcmMeta(name=path) meta.dt I am encountering the following error ``` ValueError Traceback (most recent call last) <ipython-input-5-3d49b63ff406> in <cell line: 2>() 1 #rs2meta = xsar.RadarSat2Meta(name=path) ----> 2 meta = xsar.RcmMeta(name=path)

14 frames /usr/local/lib/python3.10/dist-packages/xsar/utils.py in wrapper(args, kwargs) 93 startrss = process.memory_info().rss 94 starttime = time.time() ---> 95 result = f(args, **kwargs) 96 endtime = time.time() 97 if mem_monitor:

/usr/local/lib/python3.10/dist-packages/xsar/rcm_meta.py in init(self, name) 32 self.dt = api.open_rcm(name.split(':')[1]) 33 else: ---> 34 self.dt = api.open_rcm(name) 35 if not name.startswith('RCM_DS:'): 36 name = 'RCM_DS:%s:' % name

/usr/local/lib/python3.10/dist-packages/safe_rcm/api.py in open_rcm(url, backend_kwargs, manifest_ignores, **dataset_kwargs) 95 ) 96 ---> 97 tree = read_product(mapper, "metadata/product.xml") 98 99 calibration_root = "metadata/calibration"

/usr/local/lib/python3.10/dist-packages/safe_rcm/product/reader.py in read_product(mapper, product_path) 272 } 273 --> 274 converted = valmap( 275 lambda x: execute(**x)(decoded), 276 layout,

/usr/local/lib/python3.10/dist-packages/toolz/dicttoolz.py in valmap(func, d, factory) 83 """ 84 rv = factory() ---> 85 rv.update(zip(d.keys(), map(func, d.values()))) 86 return rv 87

/usr/local/lib/python3.10/dist-packages/safe_rcm/product/reader.py in <lambda>(x) 273 274 converted = valmap( --> 275 lambda x: execute(**x)(decoded), 276 layout, 277 )

/usr/local/lib/python3.10/dist-packages/toolz/functoolz.py in call(self, args, kwargs) 302 def call(self, args, kwargs): 303 try: --> 304 return self._partial(*args, kwargs) 305 except TypeError as exc: 306 if self._should_curry(args, kwargs, exc):

/usr/local/lib/python3.10/dist-packages/safe_rcm/product/reader.py in execute(mapping, f, path) 29 subset = query(path, mapping) 30 ---> 31 return compose_left(f, attach_path(path=path))(subset) 32 33

/usr/local/lib/python3.10/dist-packages/toolz/functoolz.py in call(self, args, kwargs) 485 486 def call(self, args, kwargs): --> 487 ret = self.first(*args, kwargs) 488 for f in self.funcs: 489 ret = f(ret)

/usr/local/lib/python3.10/dist-packages/toolz/functoolz.py in call(self, args, kwargs) 487 ret = self.first(args, **kwargs) 488 for f in self.funcs: --> 489 ret = f(ret) 490 return ret 491

/usr/local/lib/python3.10/dist-packages/safe_rcm/product/reader.py in <lambda>(obj) 126 ), 127 lambda obj: obj.set_index({"stacked": ["pole", "pulse"]}), --> 128 lambda obj: obj.unstack("stacked"), 129 ), 130 },

/usr/local/lib/python3.10/dist-packages/xarray/util/deprecation_helpers.py in inner(args, kwargs) 113 return func(args[:-n_extra_args], kwargs) 114 --> 115 return func(*args, kwargs) 116 117 return inner

/usr/local/lib/python3.10/dist-packages/xarray/core/dataset.py in unstack(self, dim, fill_value, sparse) 5576 ) 5577 else: -> 5578 result = result._unstack_once(d, stacked_indexes[d], fill_value, sparse) 5579 return result 5580

/usr/local/lib/python3.10/dist-packages/xarray/core/dataset.py in _unstack_once(self, dim, index_and_vars, fill_value, sparse) 5395 indexes = {k: v for k, v in self._indexes.items() if k != dim} 5396 -> 5397 new_indexes, clean_index = index.unstack() 5398 indexes.update(new_indexes) 5399

/usr/local/lib/python3.10/dist-packages/xarray/core/indexes.py in unstack(self) 1019 1020 if not clean_index.is_unique: -> 1021 raise ValueError( 1022 "Cannot unstack MultiIndex containing duplicates. Make sure entries " 1023 f"are unique, e.g., by calling .drop_duplicates('{self.dim}'), "

ValueError: Cannot unstack MultiIndex containing duplicates. Make sure entries are unique, e.g., by calling .drop_duplicates('stacked'), before unstacking. ``` As you can see from the last sections in the trace,the issue is with xarray/dataset.py when we unstack the dataframe. Any ideas why this is happening.The issue doesn't occur with radarsat 2 or any other dataset.So is this an xarray problem or should I raise the issue at umr-lops?

What did you expect to happen?

the error shouldn't be there,and I should be able to view the dataframe. as shown in below link https://cyclobs.ifremer.fr/static/sarwing_datarmor/xsar/examples/rcm.html

Minimal Complete Verifiable Example

Python import xsar import geoviews as gv import holoviews as hv import geoviews.feature as gf hv.extension('bokeh') path = xsar.get_test_file('RCM1_OK1050603_PK1050605_1_SC50MB_20200214_115905_HH_HV_Z010') meta = xsar.RcmMeta(name=path) meta.dt

MVCE confirmation

• [x] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
• [X] Complete example — the example is self-contained, including all data and the text of any traceback.
• [X] Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
• [X] New issue — a search of GitHub Issues suggests this is not a duplicate.
• [X] Recent environment — the issue occurs with the latest version of xarray and its dependencies.

Relevant log output

No response

Anything else we need to know?

No response

Environment

commit: None python: 3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0] python-bits: 64 OS: Linux OS-release: 6.1.58+ machine: x86_64 processor: x86_64 byteorder: little LC_ALL: en_US.UTF-8 LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.2 libnetcdf: None xarray: 2023.7.0 pandas: 1.5.3 numpy: 1.25.2 scipy: 1.11.4 netCDF4: None pydap: None h5netcdf: 1.3.0 h5py: 3.9.0 Nio: None zarr: None cftime: None nc_time_axis: None PseudoNetCDF: None iris: None bottleneck: None dask: 2023.8.1 distributed: 2023.8.1 matplotlib: 3.7.1 cartopy: None seaborn: 0.13.1 numbagg: None fsspec: 2023.6.0 cupy: None pint: None sparse: None flox: None numpy_groupies: None setuptools: 67.7.2 pip: 23.1.2 conda: None pytest: 7.4.4 mypy: None IPython: 7.34.0 sphinx: 5.0.2 /usr/local/lib/python3.10/dist-packages/_distutils_hack/__init__.py:33: UserWarning: Setuptools is replacing distutils. warnings.warn("Setuptools is replacing distutils.")