ValueError: invalid literal for int() with base 10: '' , length, of the string being operated on is that an empty string could be passed through and produce an error. The reason for the initial condition in the > my_int = int(my_string) if len(my_string) > 0 and re.sub(r"\d+", "", my_string) = '' else None The third parameter is the string or variable containing the string to perform the operation on. The second parameter of the substitute function is the This can be captured easily with the digit regex flag: The substitute function takes three parameters, the first being the Regex pattern to match all the digits in your original string. sub(regex_pattern, substitute_with_string, string_to_change) If you can import a library into your Python code try the Regex library and its corresponding substitute function: Within the exception block you can then perform whatever you wish on the string variable knowing that it cannot cleanly be converted to an integer. This is why the next block in the previous code had Therefore, as you want to capture this error on an exception block you enter the type of error you want to handle and then instruct Python on what you want to do next. ValueError: invalid literal for int() with base 10: 'test' The error that will be thrown should this operation not work will be aĪnd you will get something like this when trying to convert a string variable that This would look something a little like this:īlock above you enter the initial operation you would like to have happen to your code: converting the variable The simplest way to try if a string variable will convert to an integer is to wrap the operation in a Let’s look at each approach in a little more detail and use an example or two. Operation or perform an operation on the string to remove all integers and see if anything is left – use either the There are 3 ways to check if a string will convert to an integer in Python and these methods are: use a
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