Cannot chain column .name operations

[thomasaarholt]

Checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of Polars.

Reproducible example

df = pl.DataFrame({"Foo bar":[1,2,3]})


(
    # This works
    df
    .select(pl.all().name.map(lambda s: s.replace(" ", "_")))
    .select(pl.all().name.to_lowercase())
    
)

(
    # This does not work
    df
    .select(
        pl.all()
        .name.map(lambda s: s.replace(" ", "_"))
        .name.to_lowercase()
    )
)

(
    # This does not work
    df
    .select(
        pl.col("Foo bar")
        .name.to_lowercase()
        .name.to_lowercase()
    )
)

thread '<unnamed>' panicked at [/Users/runner/work/polars/polars/crates/polars-plan/src/logical_plan/conversion.rs:157:37](https://file+.vscode-resource.vscode-cdn.net/Users/runner/work/polars/polars/crates/polars-plan/src/logical_plan/conversion.rs:157:37):
no `rename_alias` expected at this point
---------------------------------------------------------------------------
---------------------------------------------------------------------------
PanicException                            Traceback (most recent call last)
Cell In[21], line 24
      3 (
      4     # This works
      5     df
   (...)
      8     
      9 )
     11 # (
     12 #     # This does not work
     13 #     df
   (...)
     18 #     )
     19 # )
     21 (
     22     # This does not work
     23     df
---> 24     .select(
     25         pl.all()
     26         .name.to_lowercase()
     27         .name.to_lowercase()
     28     )
     29 )
     31 # (
     32 #     # This reversed order does not work either
     33 #     df
   (...)
     42     
     43     #)#.select(pl.col("front left"))

File ~/codes/weight/.venv/lib/python3.12/site-packages/polars/dataframe/frame.py:7766, in DataFrame.select(self, *exprs, **named_exprs)
   7664 def select(
   7665     self, *exprs: IntoExpr | Iterable[IntoExpr], **named_exprs: IntoExpr
   7666 ) -> DataFrame:
   7667     """
   7668     Select columns from this DataFrame.
   7669 
   (...)
   7764 
   7765     """
-> 7766     return self.lazy().select(*exprs, **named_exprs).collect(_eager=True)

File ~/codes/weight/.venv/lib/python3.12/site-packages/polars/lazyframe/frame.py:2840, in LazyFrame.select(self, *exprs, **named_exprs)
   2835 structify = bool(int(os.environ.get("POLARS_AUTO_STRUCTIFY", 0)))
   2837 pyexprs = parse_as_list_of_expressions(
   2838     *exprs, **named_exprs, __structify=structify
   2839 )
-> 2840 return self._from_pyldf(self._ldf.select(pyexprs))

PanicException: no `rename_alias` expected at this point

Log output

No response

Issue description

I just tried to remove spaces AND set my column names to lowercase, in a dot-chained operation. Got the following panic:

Expected behavior

Chaining should work fine, not panicing

Installed versions

--------Version info---------
Polars:              0.19.12
Index type:          UInt32
Platform:            macOS-14.1.2-arm64-arm-64bit
Python:              3.12.0 (main, Jan  4 2024, 15:49:05) [Clang 17.0.6 ]

----Optional dependencies----
adbc_driver_sqlite:  0.9.0
cloudpickle:         3.0.0
connectorx:          <not installed>
deltalake:           0.15.1
fsspec:              2023.12.2
gevent:              23.9.1
matplotlib:          3.8.2
numpy:               1.26.3
openpyxl:            <not installed>
pandas:              2.2.0
pyarrow:             15.0.0
pydantic:            2.5.3
pyiceberg:           0.5.1
pyxlsb:              <not installed>
sqlalchemy:          2.0.25
xlsx2csv:            0.8.2
xlsxwriter:          3.1.9

[avimallu]

Think this is a similar to #10782?

[deanm0000]

I guess this is a bug for panicking but if you want to do multiple string manipulations to the name then do them all in the one name.map

.name.map(lambda s: s.replace(" ", "_").lower())

[deanm0000]

In trying to see if I could improve the handling I discovered:

pl.all().name.prefix("a").meta.tree_format() gives similar error

With backtrace on I get:

thread '<unnamed>' panicked at crates/polars-plan/src/logical_plan/conversion.rs:159:37:
no `rename_alias` expected at this point
stack backtrace:
   0: rust_begin_unwind
             at /rustc/d6d7a93866f2ffcfb51828b8859bdad760b54ce0/library/std/src/panicking.rs:645:5
   1: core::panicking::panic_fmt
             at /rustc/d6d7a93866f2ffcfb51828b8859bdad760b54ce0/library/core/src/panicking.rs:72:14
   2: polars_plan::logical_plan::conversion::to_aexpr
   3: polars::expr::meta::_::<impl polars::expr::PyExpr>::__pymethod_meta_tree_format__
   4: pyo3::impl_::trampoline::trampoline
   5: <unknown>
   6: PyObject_Vectorcall
   7: _PyEval_EvalFrameDefault
   8: _PyFunction_Vectorcall
   9: PyObject_Call
  10: _PyEval_EvalFrameDefault
  11: <unknown>
  12: PyEval_EvalCode
  13: <unknown>
  14: _PyEval_EvalFrameDefault
  15: <unknown>
  16: _PyEval_EvalFrameDefault
  17: <unknown>
  18: _PyEval_EvalFrameDefault
  19: <unknown>
  20: <unknown>
  21: _PyEval_EvalFrameDefault
  22: <unknown>
  23: <unknown>
  24: PyObject_Call
  25: _PyEval_EvalFrameDefault
  26: _PyFunction_Vectorcall
  27: PyObject_Call
  28: _PyEval_EvalFrameDefault
  29: <unknown>
  30: _PyEval_EvalFrameDefault
  31: <unknown>
  32: _PyEval_EvalFrameDefault
  33: <unknown>
  34: _PyEval_EvalFrameDefault
  35: <unknown>
  36: _PyEval_EvalFrameDefault
  37: <unknown>
  38: <unknown>
  39: <unknown>
  40: <unknown>
  41: <unknown>
  42: <unknown>
  43: _PyEval_EvalFrameDefault
  44: <unknown>
  45: PyEval_EvalCode
  46: <unknown>
  47: <unknown>
  48: PyObject_Vectorcall
  49: _PyEval_EvalFrameDefault
  50: _PyFunction_Vectorcall
  51: <unknown>
  52: Py_RunMain
  53: Py_BytesMain
  54: <unknown>
  55: __libc_start_main
  56: _start

[deanm0000]

Known limitation, documents updated reflecting said limitation. Stay tuned here for the chainable enhancement.