AlenkaF commented on issue #49003:
URL: https://github.com/apache/arrow/issues/49003#issuecomment-3810094460

   You are correct @pitrou, it is because of 
https://github.com/apache/arrow/pull/47882.
   
   ```
   git checkout c72572e^
   ````
   gives 
   
   ```
   >>> pa.__version__
   '22.0.0.dev236+g35bf4884a.d20260128'
   
   >>> table = pyarrow.csv.read_csv(io.BytesIO(f"data\n10E-617".encode()))
   >>> print(table)
   pyarrow.Table
   data: double
   ----
   data: [[0]]
   ```
   
   but
   
   ```
   git checkout c72572e
   ```
   
   results in
   
   ```
   >>> pa.__version__
   '22.0.0.dev237+gc72572ed5.d20260128'
   
   >>> table = pyarrow.csv.read_csv(io.BytesIO(f"data\n10E-617".encode()))
   >>> print(table)
   pyarrow.Table
   data: string
   ----
   data: [["10E-617"]]
   ```
   


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