raghumdani opened a new issue, #46361:
URL: https://github.com/apache/arrow/issues/46361

   ### Describe the bug, including details regarding any error messages, 
version, and platform.
   
   Hi there,
   
   Pyarrow is unable to parse a valid timestamp value when a custom mask is 
specified. 
   
   ### Repro Script
   ```python
   from pyarrow.compute import strptime
   
   strptime('2024/10/27 20:43:05.495', '%Y/%m/%d %H:%M:%S.%f', 'us')
   ```
   
   ### Error Message
   
   ```
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
     File 
"/Users/_/.local/share/mise/installs/python/3.12.7/lib/python3.12/site-packages/pyarrow/compute.py",
 line 269, in wrapper
       return func.call(args, options, memory_pool)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "pyarrow/_compute.pyx", line 407, in pyarrow._compute.Function.call
     File "pyarrow/error.pxi", line 155, in 
pyarrow.lib.pyarrow_internal_check_status
     File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
   pyarrow.lib.ArrowInvalid: Failed to parse string: '2024/10/27 20:43:05.495' 
as a scalar of type timestamp[us]
   ```
   
   However, strptime on python3.10 can parse above timestamp
   
   ```python
   from datetime import datetime
   
   datetime.strptime('2024/10/27 20:43:05.495', '%Y/%m/%d %H:%M:%S.%f')
   
   >>> datetime.datetime(2024, 10, 27, 20, 43, 5, 495000)
   ```
   
   Please let me know if I am missing something. 
   
   Platform: MacOS
   Pyarrow Version: 20.0.0
   Python version: 3.10
   
   ### Component(s)
   
   Python


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