我怎样才能以更有效的方式表达这一结构呢?
x = [2, 4, 6, 8, 10]
for p in x:
x = x/2
print x
必须有一个很好的方法来做到这一点。
如果您试图将 >x 的每一个元素除以 2 , 那么以下单位会这样做 :
x = np.array([2, 4, 6, 8, 10])
x /= 2
产生的 >x 值为 arary([1、2、3、4、5]) 。
请注意以上使用整数( 整数) 。 如果您想要浮动点分隔, 请将 < code> x 设置为浮动点数组 :
x = np.array([2, 4, 6, 8, 10], dtype= float64 )
或将区域更改为:
x = x / 2.0
如果是一个缩水数组, 您可以同时完成全部任务 :
In [4]: from numpy import array
In [5]: x = array([2, 4, 6, 8, 10])
In [6]: print x/2
[1 2 3 4 5]
Is there a way to force Django models to pass a field to a MySQL function every time the model data is read or loaded? To clarify what I mean in SQL, I want the Django model to produce something like ...
I am looking for an enterprise tasks scheduler for python, like quartz is for Java. Requirements: Persistent: if the process restarts or the machine restarts, then all the jobs must stay there and ...
Given the following list that contains some duplicate and some unique dictionaries, what is the best method to remove unique dictionaries first, then reduce the duplicate dictionaries to single ...
Simple enough question: I m using python random module to generate random integers. I want to know what is the suggested value to use with the random.seed() function? Currently I am letting this ...
I m using PyDev under Eclipse to write some Jython code. I ve got numerous instances where I need to do something like this: import com.work.project.component.client.Interface.ISubInterface as ...
Python s paster serve app.ini is taking longer than I would like to be ready for the first request. I know how to profile requests with middleware, but how do I profile the initialization time? I ...
Our business currently has an online store and recently we ve been offering free specials to our customers. Right now, we simply display the special and give the buyer a notice stating we will add the ...
I m trying to convert a Python dictionary into a Python list, in order to perform some calculations. #My dictionary dict = {} dict[ Capital ]="London" dict[ Food ]="Fish&Chips" dict[ 2012 ]="...