7 raise IndexError('Cannot choose from an empty sequence') from None 8 return seq[i] 1. 2. 3. 4. 5. 6. 7. 8. 1 # random.choices 2 def choices(self, population, weights=None, *, cum_weights=None, k=1): 3 """Return a k sized list of population elements chosen with replace...
15 执行字符串表示的代码 将字符串编译成python能识别或可执行的代码,也可以将文字读成字符串再编译。 In [1]:s="print('helloworld')"In [2]:r=compile(s,"<string>","exec")In [3]:rOut[3]:<codeobject<module>at0x0000000005DE75D0,file"<string>",line1>In [4]:exec(r)helloworld 16 创建...
Parameters --- n : int, optional Number of items from axis to return. Cannot be used with `frac`. Default = 1 if `frac` = None. frac : float, optional(抽样的比例) Fraction of axis items to return. Cannot be used with `n`. replace : boolean, optional Sample with or without repla...
sum_fits]sum_=0forindins_inds:sum_+=1/ind['fitness']#sum up the1/fitnessifsum_>u:#when the sumof1/fitness is bigger than u,choose the one,which means u isinthe rangeof[sum(1,2,...,n-1),sum(1,2,...,n)]and is time to choose the one,namely n-th individualin...
from mmdet.apis import inference_detector, init_detector, show_result_pyplot from mmdet.models.detectors import BaseDetector # Choose to use a config and initialize the detector config = 'configs/yolo/yolov3_mobilenetv2_320_300e_coco.py' # Setup a checkpoint file to load checkpoint = 'checkpoi...
(seq) method of random.Random instanceChoose a random element from a non-empty sequence.No. 3 :Help on method choices in module random:choices(population, weights=None, *, cum_weights=None, k=1) method of random.Random instanceReturn a k sized list of population elements chosen with ...
def epsilon_greedy(epsilon): random_value = np.random.random() choose_random = random_value < epsilon if choose_random: action = np.random.choice(num_banner) else: action = np.argmax(Q) return action 代码语言:javascript 代码运行次数:0 运行 复制 for i in range(no_of_iterations): banner...
choose_file,self.run] '''create input area''' self.in1 = wx.TextCtrl(self,-1,size = (2*s.x,3*s.y)) self.out1 = wx.TextCtrl(self,-1,size = (s.x,3*s.y)) '''create button''' self.sizer0 = wx.FlexGridSizer(cols=4, hgap=4, vgap=2) self.sizer0.Add(self.in1)...
As a first step towards creating a Python representation of the financial statements, we will need a suitable data structure. There are many to choose from, some built into Python, others from various libraries, or we can create our own. For now, let’s use a Series from the Pandas libra...
Your Turn: Choose a different section of the Brown Corpus, and adapt the preceding example to count a selection of wh words, such as what, when, where, who and why. Next, we need to obtain counts for each genre of interest. We’ll use NLTK’s support for conditional frequency distribut...