Support Path Objects Issue #5739

[alexpdev]

Located a couple of places where using Path object raises an exception. Relates to Issue #5739.

The issue can be reproduced by using a Path object in the "IMAGES_STORE" or "FILES_STORE" settings when configuring a file or image pipeline.

Code to reproduce:

from pathlib import Path
import scrapy

class MySpider(scrapy.Spider):
    name = 'myspider'
    custom_settings = {
        "IMAGES_URLS_FIELD": 'image_urls',
        "IMAGES_RESULT_FIELD": 'images',
        "IMAGES_STORE": Path.home() / 'Images',   # <-- here
        "ITEM_PIPELINES": {
            "scrapy.pipelines.images.ImagesPipeline": 1,
        }
    }

The unit tests I added will also trigger the error when tested without the changes.

And the exception that is raised:

2023-01-15 07:18:46 [twisted] CRITICAL:
Traceback (most recent call last):
  File "...\venv\lib\site-packages\twisted\internet\defer.py", line 1697, in _inlineCallbacks
    result = context.run(gen.send, result)

  ...
  File "...\venv\lib\site-packages\scrapy\pipelines\files.py", line 383, in _get_store
    return store_cls(uri)
  File "...\venv\lib\site-packages\scrapy\pipelines\files.py", line 43, in __init__
    if '://' in basedir:
TypeError: argument of type 'WindowsPath' is not iterable

[codecov]

Codecov Report

Merging #5801 (7268f08) into master (2b3a8f0) will decrease coverage by 0.16%.
The diff coverage is 100.00%.

❗ Current head 7268f08 differs from pull request most recent head 59f5250. Consider uploading reports for the commit 59f5250 to get more accurate results

@@            Coverage Diff             @@
##           master    #5801      +/-   ##
==========================================
- Coverage   88.95%   88.79%   -0.16%     
==========================================
  Files         162      162              
  Lines       11011    11016       +5     
  Branches     1796     1796              
==========================================
- Hits         9795     9782      -13     
- Misses        938      954      +16     
- Partials      278      280       +2     

Impacted Files	Coverage Δ
scrapy/pipelines/files.py	71.90% <100.00%> (+0.47%)	⬆️
scrapy/robotstxt.py	75.30% <0.00%> (-13.59%)	⬇️
scrapy/utils/test.py	60.81% <0.00%> (-5.41%)	⬇️
scrapy/core/downloader/__init__.py	90.97% <0.00%> (-1.51%)	⬇️
scrapy/core/http2/stream.py	91.32% <0.00%> (-0.58%)	⬇️

[wRAR]

Thanks!