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How to Resolve the `TypeError: can\'t use a string pattern on a bytes-like object` Error?

Patricia Arquette
Patricia ArquetteOriginal
2024-11-19 11:59:03740browse

How to Resolve the `TypeError: can't use a string pattern on a bytes-like object` Error?

TypeError: can't use a string pattern on a bytes-like object

This error occurs when you try to use a string pattern to find matches in a bytes-like object, such as the response from a URL. To resolve this issue, you can convert the bytes-like object to a string before using it in a regular expression search.

In the context of your code, you are trying to use the re.findall() function to find the title of a web page. However, the html variable is a bytes-like object, and the pattern variable is a string. To fix this, you can decode the html variable using the decode() method, passing in the appropriate encoding (such as 'utf-8'), as shown below:

with urllib.request.urlopen(url) as response:
    html = response.read().decode('utf-8')

After this change, the code should work as expected and return the title of the web page.

Further reading:

  • [Python documentation on decode() method](https://docs.python.org/3/library/io.html#io.IOBase.decode)
  • [Python documentation on URL retrieval](https://docs.python.org/3/library/urllib.request.html#urllib.request.urlopen)

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