What do parameters in my specific function mean? Question: Im currently solving an algorithmic task with Python and I got this function, which I should finish: def solution(nums: Union[List[int], Tuple[int, …]]) -> int: I don’t understand what does those thing mean in function. What is nums:? What does nums: Union[List[int], Tuple[int, …]] mean at all. …
How to resolve SQLAlchemy Union Throwing Error Question: I’m using SQL Alchemy(Python, SQLServer) Union on two queries. It throws me the below error. Please help me in resolving it. query1 = db.query(Employee.LastName).filter(Employee.Age == 30).all() query2 = db.query(Employee.LastName).filter(Employee.Salary > 25000).all() query3 = union(query1, query2).all() **"SELECT construct for inclusion in UNION or other set construct expected, got …
Equivalent C union in python? Question: Say I’m having a following code in C union u_type { uint32_t data; uint8_t chunk[4]; } 32bitsdata; 32bitsdata.chunk[0] = some number; 32bitsdata.chunk[1] = some number; 32bitsdata.chunk[2] = some number; 32bitsdata.chunk[3] = some number; printf(“Data in 32 bits: %dn”, 32bitsdata.data); How could I do similar thing in python? I’m trying …
Python .sort() on a list of a set returns None Question: Python 3.6 Just had this issue (below), where adding .sort() caused my expression to return None. Should this work? if not why not? >>> x = [1,2,3,3,45,5,6,6,7,7] >>> y = [3,4,34,643,6,234,3,34,5,22,3] >>> w =[x,y] >>> x = [set(i) for i in w] >>> x …
How to properly union with set Question: I understand that any python set union with empty set would result in itself. But some strange behave I detect when union is inside of a for loop. looks good num= set([2,3,4]) emp= set() print num|emp >>>set([2, 3, 4]) confused s = set() inp = [“dr101-mr99″,”mr99-out00″,”dr101-out00″,”scout1-scout2″,”scout3- scout1″,”scout1-scout4″,”scout4-sscout”,”sscout-super”] for …
Python set Union and set Intersection operate differently? Question: I’m doing some set operations in Python, and I noticed something odd.. >> set([1,2,3]) | set([2,3,4]) set([1, 2, 3, 4]) >> set().union(*[[1,2,3], [2,3,4]]) set([1, 2, 3, 4]) That’s good, expected behaviour – but with intersection: >> set([1,2,3]) & set([2,3,4]) set([2, 3]) >> set().intersection(*[[1,2,3], [2,3,4]]) set([]) Am …
Quick way to extend a set if we know elements are unique Question: I am performing multiple iterations of the type: masterSet=masterSet.union(setA) As the set grows the length of time taken to perform these operations is growing (as one would expect, I guess). I expect that the time is taken up checking whether each element …
