def reverse_string_reversed(s): return ''.join(reversed(s)) 详细描述: reversed()函数返回一个迭代器,该迭代器可以从字符串的最后一个字符向第一个字符遍历。join()方法用于将迭代器中的字符连接成一个新的字符串。因此,这种方法也比较简洁,并且与切片法相比,它更能体现Python的迭代器特性。 三、使用for循...
print(sys.getsizeof(num)) # In Python 2, 24 # In Python 3, 28 1. 2. 3. 4. 5. 6. 7. 8. 15、合并两个字典 在Python 2 中,使用 update() 方法来合并,在 Python 3.5 中,更加简单,在下面的代码片段中,合并了两个字典,在两个字典存在交集的时候,则使用后一个进行覆盖。 dict_1 = {'ap...
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...
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 ...
Reverse string using slicing The first and easiest way to reverse a string in python is to use slicing. We can create a slice of any string by using the syntaxstring_name[ start : end : interval ]where start and end are start and end index of the sub string which has to be sliced ...
Reverse string using [::-1] print('Python'[::-1]) # nohtyP Python Slice Operator Syntax Slice() returns a slice of the object for a specified sequence (string, tuple, list, range, or bytes). Slicing allows you to write clear, concise and readable code. Python slice() Syntax slice...
# Python3 code to demonstrate working of # Reverse Slicing string # Using join() + reversed() # initializing string test_str="GeeksforGeeks" # printing original string print("The original string is : "+test_str) # initializing K
Example: String Slicing Using slice() Method The below example takes three negative indexes. Negative indexes are usually for traversing the string in reverse order. The negative indexes print values from right to left. start = -1 (starts from last index) ...
# Python code to reverse a string # using stack # Function to create an empty stack. It # initializes size of stack as 0 defcreateStack(): stack=[] returnstack # Function to determine the size of the stack defsize(stack): returnlen(stack) ...
Note that index value starts from 0, so start_pos 2 refers to the third character in the string. Reverse a String using Slicing We can reverse a string using slicing by providing the step value as -1. s = 'HelloWorld' reverse_str = s[::-1] ...