DeprecationWarning: invalid escape sequence” in Python is an error which occurs because of a path calling error.
This post is my attempt to explain to you why this error occurs and how you can solve it, I will also include multiple solutions that could be considered as alternative fixes to the error.
Exploring the Error, DeprecationWarning: invalid escape sequence” in Python
First of all, let us check out how the message of the error looks like. Make sure the error message you have matches this one, so no confusion happens.
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DeprecationWarning: invalid escape sequence \.
DOI_PATTERN = re.compile('(https?://(dx\.)?doi\.org/)?10\.[0-9]{4,}[.0-9]*/.*')
<unknown>:20: DeprecationWarning: invalid escape sequence \(
<unknown>:21: DeprecationWarning: invalid escape sequence \(
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Bellow we will describe how the error can be solved. With multiple possible solutions.
Solution 1 : Replace \ with \\ in the path name
This solution is for most environments including pycharm.
The fix is very easy and can save you a lot of time, the solution is to
replace \ to \\ in the name of the path.
The error/warning should be gone after trying this fix.
If that is not the case, try the solution bellow.
Solution 2 : use python’s string literals the correct way
The problem is in not understanding python’s syntax.
If you want to use string literals in python. And want to use space between words you need to use the \ characters.
Just like in the example bellow.
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print("alan \t bouyt")
# alan bouyt is the printeed message
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You can also use a “raw string”, like in the example bellow.
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print(r"alan \ bouyt")
# alan bouyt is the printeed message
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Summing-up
This article is over guys, You can support us by donating to our Kofi account, you can find a red button at the top of this page. Good luck with your Python journey, keep coding, cheers.
If you want to learn more about Python, please check out the Python Documentation : https://docs.python.org/3/