Write a function swap_halves(s) that takes a string s, and returns a new string in which the two halves of the string have been swapped solved Write a function swap_halves(s) that takes a string s, and returns a new string in which the two halves of the string have been swapped
break is useful if you want to end the loop part-way through. while True: print(‘Please type your name.’) name = input() if name == ‘Mahmoud’: break print(‘Please try again’) print(‘Thank you!’) If you do this with while name != ‘Mahmoud’:, it will print Please try again at the end, even though you typed Mahmoud. while … Read more
You can try this one : s = “H!i I am f.rom G3?ermany” l = [] for i in s.split(): k = [j for j in i if j.isalpha()] for m in i: if not m.isalpha(): k.append(m) l.append(”.join(k)) print(‘ ‘.join(l)) It will o/p like : “Hi! I am from. Germany3? In python 2x you can … Read more
I won’t attempt to wade through the whole paper, but I can explain the syntax and make some educated guesses about what’s going on. #define IX(i,j) ((i)+(N+2)*(j)) This looks to me like they’re transforming two-dimensional coordinates i,j into a one-dimensional array index. j is the row number and i is the column number, which jibes … Read more
The above code can be rewritten as: indices = [] for n, value in enumerate(self.BUSES[i]): if value==1: indices.append(n) enumerate returns a pair of (index, value at that index) for a given list. So you are testing if value at a given index is 1, and if that is true, you add the index to indices. … Read more
It is not directly possible, because what must be on the left side of an assignment cannot be a function call. It can only be built from simple variables, data members, subscripts and commas, parentheses or square brackets. Best that can be done is to use a comprehension or a map on the right side: … Read more
Introduction The ‘{}+{}’ notation is a mathematical expression that is used to denote the sum of two numbers. It is a shorthand way of writing the addition of two numbers, and is commonly used in algebra and other mathematical equations. This notation is also used in programming languages such as C++ and Java, where it … Read more
I’ll break it down for you. You have a string, ‘{}+{}c’. In Tkinter, when searching for words, you usually find the position of the first letter, and the last letter. To find the position of the last letter of the word, you need to find the length of the word, and add that to the … Read more
You should try to code something before posing on Stack Overflow. This will work but won’t catch any error conditions. options = [ {‘vehicle’: ‘Car’, ‘destination’: ‘Ghana’, ‘coeff’: 0.3}, {‘vehicle’: ‘Van’, ‘destination’: ‘Nigeria’, ‘coeff’: 0.2}, {‘vehicle’: ‘Truck’, ‘destination’: ‘Togo’, ‘coeff’: 0.33}, {‘vehicle’: ‘Van’, ‘destination’: ‘Kenya’, ‘coeff’: 0.17}, {‘vehicle’: ‘Truck’, ‘destination’: ‘Somalia’, ‘coeff’: 0.31}, ] while … Read more
1) A recursive solution has a few benefits. Generally it is more readable, and smaller in terms of lines of code. When it doesn’t work, it’s almost always harder to debug. It’s usually preferable when it runs faster than a non-recursive solution (see merge sort). 2) By definition. 3) True — the point of recursion … Read more
There are multiple ways of bypassing the site protection. You have to see exactly how they are blocking you. One common way of blocking requests is to look at the User Agent header. The client ( in your case the requests library ) will inform the server about it’s identity. Generally speaking, a browser will … Read more
The second argument tells int the base of the input string. From the help: class int(object) | int(x=0) -> integer | int(x, base=10) -> integer | | Convert a number or string to an integer, or return 0 if no arguments | are given. If x is a number, return x.__int__(). For floating point | … Read more
You should try to do the complete code, but the base code is x = [[‘#’, ‘#’, ‘#’, ‘#’, ‘#’, ‘#’, ‘#’], [‘#’, ‘ ‘, ‘ ‘, ‘ ‘, ‘ ‘, ‘ ‘, ‘#’], [‘#’, ‘ ‘, ‘$’, ‘+’, ‘$’, ‘ ‘, ‘#’], [‘#’, ‘.’, ‘*’, ‘#’, ‘*’, ‘.’, ‘#’], [‘#’, ‘ ‘, ‘$’, ‘.’, … Read more
Your while loop does not do the same thing as your for loop; the for loop starts at 1 and always increments i. Move the i += 1 before the even test: i = 0 while(i < 10): i += 1 if i % 2 == 0: continue print i because 0 % 2 == … Read more
The default return of the method will be None. If you perform the following: res = output() and print out res, it will be None. By default, None is always returned when not specifying a return. >>> def output(): … print “Hello, world!” … >>> res = output() Hello, world! >>> res >>> type(res) <type … Read more