The 's' replaces just one House match at any given time but the 's+' replaces the whole space sequence at once with the 2nd parameter.
In such cases, it tends to make no change, since you are replacing anything with an empty string (Whilst it would be greater to use s+ from an efficiency perspective). When you were replacing having a non-empty string, the two would behave in different ways. Share Strengthen this respond to Adhere to
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This is very important for users of our Group that are inexperienced persons, instead of informed about the syntax. On condition that, is it possible to edit your reply to include an explanation of Everything you're performing and why you suspect it is the best strategy?
This is often reasonably standard error-checking code for a Python script that accepts command-line arguments.
The 1st regex will match one whitespace character. The second regex will reluctantly match one or more whitespace people. For some functions, these two regexes are incredibly related, other than in the next situation, the regex can match a lot more in the string, if it prevents the regex match from failing. from
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And because your second parameter is empty string "", there's no difference between the output of two scenarios.
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Many of the illustrations offered below use arrays which hasn't been taught nevertheless, so I'm assuming I can not use %s still possibly.
The width is just not specified in the structure string, but as a further integer worth argument preceding the argument that should be formatted.
If the value being output is a lot less than 4 character positions large, the value is correct justified in the sphere by default.
If the worth is greater than 4 character positions large, the field width expands to accommodate the right number of figures.
So the first if assertion interprets to: when you have not passed me an argument, I'm going to tell you how you need to pass me an argument Down the road, e.g. you will see this on-display screen: