id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type 1664193419,I_kwDOAMm_X85jMZOL,7748,diff('non existing dimension') does not raise exception,4441338,open,0,,,4,2023-04-12T09:29:58Z,2024-04-21T22:31:37Z,,NONE,,,,"### What happened? Calling xr.DataArray.diff with a non-existing dimension does not raise an exception. ### What did you expect to happen? An exception to be raised. ### Minimal Complete Verifiable Example ```Python import xarray as xr; import numpy as np; xr.DataArray(np.arange(10),dims=('a',)).diff('b') ``` ### 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](https://mybinder.org/v2/gh/pydata/xarray/main?urlpath=lab/tree/doc/examples/blank_template.ipynb), returning the result. - [X] New issue — a search of GitHub Issues suggests this is not a duplicate. ### Relevant log output _No response_ ### Anything else we need to know? _No response_ ### Environment
INSTALLED VERSIONS ------------------ commit: None python: 3.10.9 | packaged by conda-forge | (main, Feb 2 2023, 20:20:04) [GCC 11.3.0] python-bits: 64 OS: Linux OS-release: 5.10.0-21-amd64 machine: x86_64 processor: byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.2 libnetcdf: 4.8.1 xarray: 2023.3.0 pandas: 1.5.3 numpy: 1.23.5 scipy: 1.10.1 netCDF4: 1.6.2 pydap: None h5netcdf: 1.1.0 h5py: 3.8.0 Nio: None zarr: 2.14.2 cftime: 1.6.2 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2023.3.1 distributed: 2023.3.1 matplotlib: 3.7.1 cartopy: None seaborn: 0.12.2 numbagg: None fsspec: 2023.3.0 cupy: None pint: None sparse: 0.14.0 flox: 0.6.9 numpy_groupies: 0.9.20 setuptools: 67.6.0 pip: 23.0.1 conda: 23.1.0 pytest: 7.2.2 mypy: 1.1.1 IPython: 8.11.0 sphinx: 6.1.3
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/7748/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue 1195097342,I_kwDOAMm_X85HO7z-,6449,query on coords only dataset fails,4441338,open,0,,,1,2022-04-06T19:46:12Z,2022-04-14T22:16:00Z,,NONE,,,,"### What happened? I make a dataset with some variables, and make them all coordinates. Then I try to query on the dataset. Error ensues. ### What did you expect to happen? No error. ### Minimal Complete Verifiable Example ```Python import xarray as xr import pandas as pd x = xr.Dataset.from_dataframe(pd.DataFrame(data=[[0,1],[2,3]],columns=['a','b'])) # display(x.query(index='a==0')) #fine y = x.set_coords(['a','b']) # display(y) #fine y.query(index='a==0') #error ``` ### Relevant log output ```Python --------------------------------------------------------------------------- KeyError Traceback (most recent call last) ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/scope.py in resolve(self, key, is_local) 199 assert not is_local and not self.has_resolvers --> 200 return self.scope[key] 201 except KeyError: ~/miniconda3/lib/python3.9/collections/__init__.py in __getitem__(self, key) 940 pass --> 941 return self.__missing__(key) # support subclasses that define __missing__ 942 ~/miniconda3/lib/python3.9/collections/__init__.py in __missing__(self, key) 932 def __missing__(self, key): --> 933 raise KeyError(key) 934 KeyError: 'a' During handling of the above exception, another exception occurred: KeyError Traceback (most recent call last) ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/scope.py in resolve(self, key, is_local) 205 # e.g., df[df > 0] --> 206 return self.temps[key] 207 except KeyError as err: KeyError: 'a' The above exception was the direct cause of the following exception: UndefinedVariableError Traceback (most recent call last) /tmp/ipykernel_23733/4091370488.py in () 5 y = x.set_coords(['a','b']) 6 display(y) ----> 7 y.query(index='a==0') ~/miniconda3/lib/python3.9/site-packages/xarray/core/dataset.py in query(self, queries, parser, engine, missing_dims, **queries_kwargs) 7605 7606 # evaluate the queries to create the indexers -> 7607 indexers = { 7608 dim: pd.eval(expr, resolvers=[self], parser=parser, engine=engine) 7609 for dim, expr in queries.items() ~/miniconda3/lib/python3.9/site-packages/xarray/core/dataset.py in (.0) 7606 # evaluate the queries to create the indexers 7607 indexers = { -> 7608 dim: pd.eval(expr, resolvers=[self], parser=parser, engine=engine) 7609 for dim, expr in queries.items() 7610 } ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/eval.py in eval(expr, parser, engine, truediv, local_dict, global_dict, resolvers, level, target, inplace) 348 ) 349 --> 350 parsed_expr = Expr(expr, engine=engine, parser=parser, env=env) 351 352 # construct the engine and evaluate the parsed expression ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in __init__(self, expr, engine, parser, env, level) 809 self.parser = parser 810 self._visitor = PARSERS[parser](self.env, self.engine, self.parser) --> 811 self.terms = self.parse() 812 813 @property ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in parse(self) 828 Parse an expression. 829 """""" --> 830 return self._visitor.visit(self.expr) 831 832 @property ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit(self, node, **kwargs) 413 method = ""visit_"" + type(node).__name__ 414 visitor = getattr(self, method) --> 415 return visitor(node, **kwargs) 416 417 def visit_Module(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit_Module(self, node, **kwargs) 419 raise SyntaxError(""only a single expression is allowed"") 420 expr = node.body[0] --> 421 return self.visit(expr, **kwargs) 422 423 def visit_Expr(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit(self, node, **kwargs) 413 method = ""visit_"" + type(node).__name__ 414 visitor = getattr(self, method) --> 415 return visitor(node, **kwargs) 416 417 def visit_Module(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit_Expr(self, node, **kwargs) 422 423 def visit_Expr(self, node, **kwargs): --> 424 return self.visit(node.value, **kwargs) 425 426 def _rewrite_membership_op(self, node, left, right): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit(self, node, **kwargs) 413 method = ""visit_"" + type(node).__name__ 414 visitor = getattr(self, method) --> 415 return visitor(node, **kwargs) 416 417 def visit_Module(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit_Compare(self, node, **kwargs) 721 op = self.translate_In(ops[0]) 722 binop = ast.BinOp(op=op, left=node.left, right=comps[0]) --> 723 return self.visit(binop) 724 725 # recursive case: we have a chained comparison, a CMP b CMP c, etc. ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit(self, node, **kwargs) 413 method = ""visit_"" + type(node).__name__ 414 visitor = getattr(self, method) --> 415 return visitor(node, **kwargs) 416 417 def visit_Module(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit_BinOp(self, node, **kwargs) 534 535 def visit_BinOp(self, node, **kwargs): --> 536 op, op_class, left, right = self._maybe_transform_eq_ne(node) 537 left, right = self._maybe_downcast_constants(left, right) 538 return self._maybe_evaluate_binop(op, op_class, left, right) ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in _maybe_transform_eq_ne(self, node, left, right) 454 def _maybe_transform_eq_ne(self, node, left=None, right=None): 455 if left is None: --> 456 left = self.visit(node.left, side=""left"") 457 if right is None: 458 right = self.visit(node.right, side=""right"") ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit(self, node, **kwargs) 413 method = ""visit_"" + type(node).__name__ 414 visitor = getattr(self, method) --> 415 return visitor(node, **kwargs) 416 417 def visit_Module(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/expr.py in visit_Name(self, node, **kwargs) 547 548 def visit_Name(self, node, **kwargs): --> 549 return self.term_type(node.id, self.env, **kwargs) 550 551 def visit_NameConstant(self, node, **kwargs): ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/ops.py in __init__(self, name, env, side, encoding) 96 tname = str(name) 97 self.is_local = tname.startswith(LOCAL_TAG) or tname in DEFAULT_GLOBALS ---> 98 self._value = self._resolve_name() 99 self.encoding = encoding 100 ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/ops.py in _resolve_name(self) 113 114 def _resolve_name(self): --> 115 res = self.env.resolve(self.local_name, is_local=self.is_local) 116 self.update(res) 117 ~/miniconda3/lib/python3.9/site-packages/pandas/core/computation/scope.py in resolve(self, key, is_local) 209 from pandas.core.computation.ops import UndefinedVariableError 210 --> 211 raise UndefinedVariableError(key, is_local) from err 212 213 def swapkey(self, old_key: str, new_key: str, new_value=None) -> None: UndefinedVariableError: name 'a' is not defined ``` ### Anything else we need to know? If the dataset has one data variable, then the error does not happen. ### Environment INSTALLED VERSIONS ------------------ commit: None python: 3.9.12 | packaged by conda-forge | (main, Mar 24 2022, 23:25:59) [GCC 10.3.0] python-bits: 64 OS: Linux OS-release: 4.19.0-19-amd64 machine: x86_64 processor: byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.1 libnetcdf: 4.8.1 xarray: 2022.3.0 pandas: 1.4.1 numpy: 1.22.3 scipy: 1.8.0 netCDF4: 1.5.8 pydap: None h5netcdf: 1.0.0 h5py: 3.6.0 Nio: None zarr: 2.11.1 cftime: 1.5.2 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2022.03.0 distributed: 2022.3.0 matplotlib: 3.5.1 cartopy: None seaborn: 0.11.2 numbagg: None fsspec: 2022.02.0 cupy: None pint: 0.18 sparse: 0.13.0 setuptools: 59.8.0 pip: 22.0.4 conda: 4.12.0 pytest: 7.1.1 IPython: 7.32.0 sphinx: None","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/6449/reactions"", ""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue