编写一个程序,接收用户输入的字符串,并输出其反转后的结果。 python 复制代码 def reverse_string(): user_input = input("请输入一个字符串:") reversed_string = user_input[::-1] print(f"反转后的字符串为:{reversed_string}") reverse_string() 这个简单的程序使用切片操作反转字符串,非常直观。 结论...
```python class ListNode: def __init__(self, val=0, next=None): self.val = val self.next = next def reverse_linked_list(head): prev = None curr = head while curr: next_node = curr.next curr.next = prev prev = curr curr = next_node return prev # 测试 node1 = ListNode(1)...
string.rstrip() #删除字符串末尾的空白 string.lstrip() #删除字符串开头的空白 string.strip() #删除字符串两头的空白 (5)定义字符串是可以使用双引号或者单引号,但是两者不能混合使用 4.python 经典语句:在解释器中使用import this 了解 5.列表:列表中的数据是可以变化的 简易操作: (1)使用print(list[-1]...
>>> import string >>> string.digits #数字字符常量 '0123456789' >>> string.punctuation #标点符号常量 '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~' >>> string.letters #python2.x中使用错误 Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: m...
a ="PYTHON"b=a.lower()print(b) 结果为:python 4、文本对齐 string.ljust(width) # 返回一个原字符串左对齐,并使空格填充至长度 width 的新字符串 string.rjust(width) # 返回一个原字符串右对齐,并使空格填充至长度 width 的新字符串 string.center(width) # 返回一个原字符串居中,并使空格填充至长...
Python TypeError: ‘NoneType’ object is not subscriptable Solution Analyze Sentiment Using VADER in Python Python NameError name is not defined Solution Reverse a String in Python Python SyntaxError: ‘return’ outside function Solution Extract Images from PDF in Python ...
sorted_d= dict(sorted(d.items, key=itemgetter(1), reverse=True)) Pretty print 在Python中使用Print函数,有时候的输出贼拉拉丑陋,此时我们使用pprint可以使输出更加美观,样例如下: from pprint import pprintdata = {"name": "john deo","age": "22","address": {"contry": "canada", "state": "an...
程序段如下:ls=list(range(5))ls.append["Computer","Python"]ls.reverse()print(ls)print函数输出的结果()A.[['Computer','Python'],0,1,2,3,4]B.[4,3,2,1,0,['Computer','Python']]C.[['Computer','Python'],4,3,2,1,0]D.[0,1,2,3,4,['Computer','Python']] 相关知识点: ...
PS>$env:PYTHONUNBUFFERED='True' With this command, you set thePYTHONUNBUFFEREDenvironment variable to a non-empty string, which causes all runs of Python scripts in your current environment to run unbuffered. To reverse this change, run the command again, but set the variable to an empty stri...
Initially, we choose the row components in reverse order using slice notation [::-1]. Next, we eliminate the final element by using [:-1]. row = [max(i, j+1) for i in range(1,n+1)] row[::-1][:-1] The sequence of numbers is as follows: - [4, 3, 2] - [4, 3, 2...