for index, val in enumerate(reversed(list)): print len(list) - index - 1, val #2 def reverse_enum(L): for index in reversed(xrange(len(L))): yield index, L[index] L = ['foo', 'bar', 'bas'] for index, item in reverse_enum(L): print index, item #3 L = ['foo', 'b...
Basically, thereversed()function is good when you want to iterate over a list in reverse order without creating a copy. You can also convert the iterator into a list if you need a reversed version of the list itself. numbers=[1,2,3,4,5]#Convert the iterator to a listreversed_numbers...
【Python面试真题】-how do I iterate over a sequence in reverse order? for x in reversed(sequence): ... # do something with x.. 如果不是list, 最通用但是稍慢的解决方案是: for i in range(len(sequence)-1, -1, -1): x = sequence[i] <do something with x>...
The dictionary unpacking operator (**) is an awesome feature in Python. It allows you to merge multiple dictionaries into a new one, as you did in the example above. Once you’ve merged the dictionaries, you can iterate through the new dictionary as usual....
Just like before, you can use sorted() to iterate through each element of the iterable you pass in. In a string, each element means each character, including spaces. Note: Python sorts strings lexicographically by comparing Unicode code points of the individual characters from left to right. ...
Using the same examplenumbersabove, reverse the list using this function. Don’t forget to wrap the function withlist()to actually store the return value ofreversed()into a list. newList=list(reversed(numbers))print(newList) Alternatively, you can also use aforloop to iterate over the rever...
You can also reverse a string in Python by using a for loop to iterate over the characters in the string and append them to a new string in reverse order. Here’s an example: # Using a for loop to reverse a string my_string = 'Hello, World!' reversed_string = '' for char in...
for x in list: “do something with x” finally: list.reverse() 如果不是list, 最通用但是稍慢的解决方案是: for i in range(len(sequence)-1, -1, -1): x = sequence[i] 【如何反序的迭代一个序列?how do I iterate over a sequence in reverse order】相关文章 ...
Learn Python in-depth with real-world projects through our Python certification course. Enroll and become a certified expert to boost your career. Method 3: Using a loop This is a very simple approach. Here we initialize an empty list and then use a for loop to iterate over the tuple. Fo...
We created a loop to iterate over the length of our string value using the LEN function. We used the MID function to extract each character of the value string and the IsNumeric function to check whether the current character is a numeric digit. Select cell C5 and insert the following form...