gh-141924:Splitting of Unrelated mixed ideas in one paragraph of the tutorial (sys.path section)

[SkvProgrammer]

Splitting of Unrelated mixed ideas in one paragraph of the tutorial (sys.path section)

What's the problem

After initialization, Python programs can modify :data:sys.path. The
directory containing the script being run is placed at the beginning of the
search path, ahead of the standard library path. This means that scripts in that
directory will be loaded instead of modules of the same name in the library
directory. This is an error unless the replacement is intended. See section
:ref:tut-standardmodules for more information.

The first sentence describes the fact that Python programs can modify sys.path manually after initialization. The following sentences describe a separate and independent behavior: the directory of the executed script is automatically placed at the beginning of the module search path, which may cause shadowing of library modules with the same name.

These two behaviors are not logically connected yet are presented within a single paragraph without any transition. This may lead readers to incorrectly assume a relationship between manual modification of sys.path and the automatic placement of the script directory.

Improvement

Spliting the paragraph into two separate paragraphs, indicating that these are independent aspects of module lookup behavior. This will improve clarity and reduce potential confusion for readers.

from:

After initialization, Python programs can modify :data:sys.path. The
directory containing the script being run is placed at the beginning of the
search path, ahead of the standard library path. This means that scripts in that
directory will be loaded instead of modules of the same name in the library
directory. This is an error unless the replacement is intended. See section
:ref:tut-standardmodules for more information.

to:

After initialization, Python programs may modify :data:sys.path directly. This
can be useful in some situations, but it may also lead to import-related issues
if misused.

Independently of any manual changes, Python automatically places the directory
containing the executed script at the beginning of the module search path.
Because this entry precedes the standard library path, modules in the script
directory can shadow standard library modules of the same name. This is usually
unintended and can lead to confusing errors. See section :ref:tut-standardmodules
for more information.

• Issue: Two unrelated ideas mixed in one paragraph of the tutorial (sys.path section) #141924

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[StanFromIreland]

Please dedent the text.

[SkvProgrammer]

@StanFromIreland please review the changes