callable

问题 I am querying all my 10 tables to get the user id from them and loading all the user id's into HashSet so that I can have unique user id. As of now it is sequentially. We go to one table and extract all the user_id from it and load it in hash set and then second and third table and keep going. private Set<String> getRandomUsers() { Set<String> userList = new HashSet<String>(); // is there any way to make this parallel? for (int table = 0; table < 10; table++) { String sql = "select * from

问题 I'm getting this error: Traceback (most recent call last): File "C:\Users\George\Desktop\ex3.py", line 15, in <module> s=s+d*2(-1/6.)*(u-1)*(u-2)*(u+2)*(u-4) TypeError: 'int' object is not callable Here is my code: x=input() z=input() n=input() while x>=z: x=input() z=input() while n<0: n=input() while n>0: d=(z-x)/1.*n k=1 s=(d/2.)*((-1/6.)*(x-1)*(x-2)*(x+2)*(x-4)+(-1/6.)*(z-1)*(z-2)*(z+2)*(z-4)) while k<=n-1: u=x+k*d s=s+d*2(-1/6.)*(u-1)*(u-2)*(u+2)*(u-4) k=k+1 print "%.3f" %s x=input() z

问题 This question already has answers here : TypeError: 'int' object is not callable (4 answers) Closed 3 months ago . I'm trying to figure out why I'm getting an error when using the sum function on a range. Here is the code: data1 = range(0, 1000, 3) data2 = range(0, 1000, 5) data3 = list(set(data1 + data2)) # makes new list without duplicates total = sum(data3) # calculate sum of data3 list's elements print total And here is the error: line 8, in <module> total2 = sum(data3) TypeError: 'int'

问题 I'm trying to return a 2d array from call(), I'm having some issues. My code so far is: //this is the end of main Thread t1 = new Thread(new ArrayMultiplication(Array1, Array2, length)); t1.start(); } public int[][] call(int[][] answer) { int[][] answer = new int[length][length]; answer = multiplyArray(Array1, Array2, length); //off to another function which returns the answer to here return answer; } This code compiles, this is not returning my array. I'm sure I'm probably using the wrong

问题 I have a method that I would like to call. However, I'm looking for a clean, simple way to kill it or force it to return if it is taking too long to execute. I'm using Java. to illustrate: logger.info("sequentially executing all batches..."); for (TestExecutor executor : builder.getExecutors()) { logger.info("executing batch..."); executor.execute(); } I figure the TestExecutor class should implement Callable and continue in that direction. But all i want to be able to do is stop executor

问题 What is the difference between using the Runnable and Callable interfaces when designing a concurrent thread in Java, why would you choose one over the other? 回答1: See explanation here. The Callable interface is similar to Runnable, in that both are designed for classes whose instances are potentially executed by another thread. A Runnable, however, does not return a result and cannot throw a checked exception. 回答2: What are the differences in the applications of Runnable and Callable . Is

问题 Today I found a wierd problem. What I want is to check server availability (Particularly SSL checking) once application started and display proper message if server is down. This process should work in background and user is able to navigate the app if server has problem (app can works offline). What I did is simple. In main activity I have @Override protected void onStart() { super.onStart(); // Check Internet connection // Check Location sensor // Check server accessibility BackendCheck

问题 There is not much documentation to understand how exactly does runInTransaction() method works. While executing multiple operations on different DAO's if no value is to be returned I could use runInTransaction(Runnable body) OR runInTransaction(Callable<V> body) if any result is to be returned. Query that I have: If all the queries in the transaction are successful, then I want to return an image object that needs to be uploaded to a server on successful transaction If any exception occurred

问题 After reading a few errors of the type 'int not callable' on stackoverflow, I see that most errors of the type involve treating an int like a function. I am getting this error on the following program and I'm not sure what's going on: find the power of n that satisfies the equation for n in range(100): if ((2^n // 3) % 2) == 1: print n The error traceback reads: File "<stdin>", line 1, in <module> TypeError: 'int' object is not callable 回答1: You have a variable named range , which you're

问题 This is the part of the code that gives me the error. I am trying to give the plot a range from 12 to 3. It is a logarithmic function so it is 12 to 3 not 3 to 12 in case anyone asks. pp = PdfPages('BV_V.pdf') plt.plot(BVcolor, Vmag, 'go') plt.xlabel('B-V color') plt.ylabel('Magnitude of V') plt.errorbar(BVcolor, Vmag, xerr=BVerror, yerr=Verror, fmt='bo') plt.xlim([0.5,1.5]) plt.ylim([12.0,3.0]) pp.savefig() plt.close() pp.close() The error I am getting is 81 plt.ylabel('Magnitude of V') 82