If you don't mind overwriting the original and don't want to use slicing (as mentioned in comments), you can call reverse() method on the list. >>> num_list = [1, 2, 3, 4, 5]>>>num_list.reverse()>>>num_list [5, 4, 3, 2, 1] If you want to loop over the reversed ...
Reverse a List Using the Slice Operator in Python If you prefer not to loop over the list, then use thesliceoperatorto decrement the array index by 1. Similar torange(), the slice operator accepts three arguments:start,stop, andstep. ...
list的reverse方法将list本身反转,并且返回值是None。 reversed python>>> l = [1, 2, 3, 4] >>> reversed(l) <listreverseiterator object at 0x10de40f10> >>> for i in reversed(l): ... print(i) ... 4 3 2 1 reversed返回的是listreverseiterator并不是一个新的list,这个函数不会改变list...
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...
When you use[::-1]: The empty start and stop (:) mean "use the whole list." The-1step moves through the list in reverse order. Understanding List Reversal in Python In Python, reversing a list means changing the order of elements so that the last item appears first and the first it...
The fastest (and easiest?) way is to use a slice that steps backwards,-1. ExampleGet your own Python Server Reverse the string "Hello World": txt ="Hello World"[::-1] print(txt) Try it Yourself » Example Explained We have a string, "Hello World", which we want to reverse: ...
Use Slicing to reverse a String¶The recommended way is to use slicing.my_string = "Python" reversed_string = my_string[::-1] print(reversed_string) # nohtyP Slicing syntax is [start:stop:step]. In this case, both start and stop are omitted, i.e., we go from start all the ...
In python, a tuple is an list like data structure, which consists of elements of the same types and fixed length. The length of tuple is fixed at the time of creating the tuple, once it is defined we can’t able to modify it. Reverse a tuple in Python To reverse a tuple in Python...
number: The number to reverse Returns: The reversed number """ # Handle negative numbers is_negative = number < 0 number_str = str(abs(number)) # Use list comprehension to create a reversed string reversed_str = ''.join([number_str[i] for i in range(len(number_str)-1, -1, -1...
You can use slicing to access the entire string and reverse it. Here’s how: # Using slicing to reverse a string my_string = 'Hello, World!' reversed_string = my_string[::-1] print(reversed_string) The [::-1] syntax in the above code tells Python to slice the entire string and...