It suggests zero or more event of whitespace figures, followed by a comma after which followed by zero or maybe more incidence of whitespace figures.
In such a case, it helps make no difference, since you are replacing anything with the empty string (While it would be far better to employ s+ from an performance point of view). Should you ended up changing which has a non-vacant string, The 2 would behave in another way. Share Enhance this response Observe
How can it's made the decision that a prospect has won a point out Despite the fact that not all of the votes are actually documented?
Using %s in scanf with no an explcit field width opens precisely the same buffer overflow exploit that receives did; namely, if you can find extra characters inside the input stream when compared to the target buffer is sized to hold, scanf will happily compose All those extra characters to memory outside the buffer, possibly clobbering anything significant. Regretably, in contrast to in printf, you can't supply the sphere with to be a operate time argument:
This really is rather regular error-examining code for a Python script that accepts command-line arguments.
The real difference lies in how it get's managed. In case you might have a group of (for example) three spaces directly next one another s+ will take that team and turns The full it into a "", while s would proces each individual Place on its own.
The %s token lets me to insert (and likely structure) a string. See which the %s token is changed by whichever I go to your string once the % symbol.
Andrew HareAndrew Hare 351k7575 gold badges645645 silver badges641641 bronze badges 3 fifteen Notice that this kind of string interpolation is deprecated in favor of the greater strong str.format process.
Detect also that i'm using a tuple below as well (if you have only 1 string utilizing a tuple is optional) As an instance that a number of strings can be inserted and formatted in one statement.
How can I avoid Functioning extra time on account of children's deficiency of setting up devoid of harming them far too terribly?
In an eclipsing binary orbited by an Earth like Earth, would the drops in brightness be noticeable?
Like that it could stand By itself. Furnishing an case in point which was comparable to the example inside the concern would also be a in addition.
Another if statement checks to find out When the 'databases-title' you handed to your script in fact exists within the filesystem. Otherwise, you'll get click here a information such as this: