AI代码解释 >>>clothes=['skirt','red sock']>>>forclothinginclothes:# Iterate over the list...if'sock'inclothing:# Find stringswith'sock'...clothes.append(clothing)# Add the sock's pair...print('Added a sock:',clothing)# Inform the user...Added a sock:red sock Added a sock:red ...
The Iterator onject starts from the first element of the collection until all the elements are accessed. The iterator can only move forward without going backwards. 迭代器有两个基本的方法:iter() 和 next(). Iterator have two basic methods: iter() and next() 字符串,列表和元组对象都可用于创...
>>>clothes = ['skirt','red sock']>>>forclothinginclothes:# Iterate over the list...if'sock'inclothing:# Find strings with 'sock'...clothes.append(clothing)# Add the sock's pair...print('Added a sock:', clothing)# Inform the user... Added a sock: red sock Added a sock: red...
这段代码的可视化执行在autbor.com/iteratebackwards2进行。通过向后迭代,我们可以在列表中添加或删除条目。但是这可能很难做到正确,因为对这一基本技术的微小改变最终可能会引入错误。创建新列表比修改原始列表简单得多。正如 Python 核心开发者 Raymond Hettinger 所说: 问:循环遍历列表时修改列表的最佳实践是什么? 答...
If the ordering requirement is to order an iterable by each string spelled backwards, then you could define a function that reverses a word.In the example below, you define a function named reverse_word() that reverses the string passed to it. Then, you use reverse_word as the value of ...
We can also use a negative value for ourstepargument to iterate backwards, but we’ll have to adjust ourstartandstoparguments accordingly: foriinrange(100,0,-10):print(i) Copy Here, 100 is thestartvalue, 0 is thestopvalue, and-10is the range, so the loop begins at 100 and ends at...
# the first element of the list. # The 3rd argument of range means we iterate backwards, reducing the count # of i by 1 for i in range(n, -1, -1): heapify(nums, n, i) # Move the root of the max heap to the end of for i in range(n - 1, 0, -1): nums[i], nums[...
# Use reversed to iterate backwards over the list of layers. for layer in reversed(layers): Y = activations.pop() # Get the activations of the last layer on the stack # Compute the error at the output layer. # The output layer error is calculated different then hidden layer error. if...
The range object is lazy. In this example, the individual numbers in the range are first referenced when you convert it to a list. Additionally, you don’t exhaust ranges when you iterate over them. You can reuse them as many times as you want....
这里的目标是用RNN构建一个语言模型,下面会解释一下什么是语言模型。假设有一个包含 个词的句子,语言模型可以如下预测出这个句子出现的概率(在给定数据集中): 也就是说,一个句子出现的概率是句子中每一个词在它前面的词给定的情况下出现的概率的乘积。所以,“他去买了一些巧克力”这句话的概率是给定“他去买了...