如何在python中将字典的长度返回给变量？

Question

如何在python中将字典的长度返回给变量？

Answer 1

只需使用len（）：

dic = {'val1':0,'val2':0,'val3':0}
length = len(dic)

Answer 2

ExecutorService service = new ThreadPoolExecutor(8, Integer.MAX_VALUE, 60L, TimeUnit.SECONDS, new SynchronousQueue<Runnable>());

获取字典中的键数。相当于my_var = len(my_dict)。

Answer 3

my_dict = {'a':1,'b':2,'c':3}

var = len(dict)