It states zero or maybe more occurrence of whitespace characters, accompanied by a comma after which you can accompanied by zero or maybe more occurrence of whitespace people.
Those two replaceAll phone calls will often create exactly the same result, in spite of what x is. Nonetheless, it is crucial to note the two normal expressions are usually not precisely the same:
In some code that I've to maintain, I've found a structure specifier %*s . Can any person inform me what this is and why it is actually utilised?
five @powersource97, %.*s implies you might be studying the precision benefit from an argument, and precision is the utmost number of figures for being printed, and %*s you are examining the width worth from an argument, which happens to be the least quantity os figures to be printed.
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The initial regex will match just one whitespace character. The 2nd regex will reluctantly match a number of whitespace people. For some applications, both of these regexes are extremely equivalent, besides in the second situation, the regex can match a lot more in the string, if it prevents the regex match from failing. from
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char character; // only a char 1 letter/with the ascii map character = 'a'; // assign 'a' to character
The PEP will not say "supplanted" As well as in no more info Component of the PEP does it say the % operator is deprecated (yet it does say other matters are deprecated down the bottom). You may like str.format and that is fantastic, but till there is a PEP saying it can be deprecated there isn't any sense in boasting it's when it is not.
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The width isn't specified in the structure string, but as a further integer worth argument preceding the argument that should be formatted.
If the value to generally be output is fewer than 4 character positions wide, the worth is right justified in the sector by default.
If the worth is greater than 4 character positions large, the sector width expands to support the right variety of people.
So the 1st 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 in the future, e.g. you will see this on-display screen: