lxml.etree.XPathEvalError_Invalid expression

[tellts]

VSC, Windows 10, Python 3.9.5

# lesson https://www.youtube.com/watch?v=MeBU-4Xs2RU&t=2s
from requests_html import HTMLSession
url = 'https://www.beerwulf.com/en-gb/c/beers?segment=Beers&catalogCode=Beer_1'
s = HTMLSession()
r = s.get(url)
r.html.render(sleep=2)
#print(r.status_code) #200
products = r.html.xpath('//*[@id="product-items-container"], first = True')
print(products)

> & C:/python39/python.exe c:/parsing/2020/a3test.py
Traceback (most recent call last):
  File "c:\parsing\2020\a3test.py", line 8, in <module>
    products = r.html.xpath('//*[@id="product-items-container"], first = True')
  File "C:\python39\lib\site-packages\requests_html.py", line 255, in xpath
    selected = self.lxml.xpath(selector)
  File "src\lxml\etree.pyx", line 1599, in lxml.etree._Element.xpath
  File "src\lxml\xpath.pxi", line 305, in lxml.etree.XPathElementEvaluator.__call__
  File "src\lxml\xpath.pxi", line 225, in lxml.etree._XPathEvaluatorBase._handle_result
lxml.etree.XPathEvalError: Invalid expression
PS C:\parsing\2020> 

[tellts]

In another lesson xpath is processed correctly.

[eth7]

The code you posted raises a lxml.etree.XPathEvalError when attempting to extract the products due to a missing quote in the XPath expression, which causes it to be invalid.

Here is the fixed code:

...
products = r.html.xpath('//*[@id="product-items-container"]', first = True)

There is no exception anymore and it successfully returns the products

<Element 'div' data-v-6226b75c='' id='product-items-container' class=('product-items-container',)>

[eth7]

@surister This is not a bug in the library, it can be closed.

[tellts]

Thank You.