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find all possible combinations of letters in a string in python [duplicate]

Your example input/output suggests that you are looking for a power set. You could generate a power set for a string using itertools module in Python: from itertools import chain, combinations def powerset(iterable): “powerset([1,2,3]) –> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)” s = list(iterable) return chain.from_iterable(combinations(s, r) for r in range(len(s)+1)) print(list(map(”.join, powerset(‘abcd’)))) … Read more

How to sum all range output in python 3

You can use a generator expression within the sum function >>> sum(i**i for i in range(1,11)) 10405071317

Python. How to make it say something custom [closed]

Check this out. http://www.python-course.eu/python3_formatted_output.php fruit = “orange” say = “hey eating {0} is a good idea”.format(fruit) print(say)

How can I convert this python for-loop using a range into C++?

While the classic for(;;) loop can be used for any iteration that you can imagine, your particular loop can be written more readably like this: namespace sv = std::views; for (int i : sv::iota(0, n-1) | sv::reverse) { // … } Here’s a demo. For completeness, here’s what a classic for(;;) loop would look like: … Read more

ValueError: invalid literal for int() with base 10:

You must supply a user when you create a department. You can access the current user as request.user if you are in a view user = request.user or fetch any user from the database if you are testing in the shell user = User.objects.get(id=1) # get then create the department: department = Department(name=”test”, description=’test’, user=user, … Read more

Python: Does Python have a ternary conditional operator?

Yes, It was added in version 2.5. The expression syntax is: a if condition else b First condition is evaluated, then exactly one of either a or b is evaluated and returned based on the Boolean value of condition. If condition evaluates to True, then a is evaluated and returned but b is ignored, or … Read more

What does if name == "main": do?

Short Answer It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend to. Here are some common problems when the guard is omitted from a script: If you import the guardless script in another script (e.g. import my_script_without_a_name_eq_main_guard), then the second script will trigger the first to run at import … Read more

What does the "yield" keyword do?

To understand what yield does, you must understand what generators are. And before you can understand generators, you must understand iterables. Iterables When you create a list, you can read its items one by one. Reading its items one by one is called iteration: >>> mylist = [1, 2, 3] >>> for i in mylist: … Read more