Else block in for loop Reverse for loop Backward Iteration using the reversed() function Reverse for loop using range() Nested for loops While loop inside for loop for loop in one line Accessing the index in for loop Iterate String using for loop Iterate List using for loop Iterate Dictionary...
To loop in the reverse direction, you can use Python's built-in reversed function:>>> colors = ["purple", "blue", "green", "pink", "red"] >>> for color in reversed(colors): ... print("I like", color) ... I like red I like pink I like green I like blue I like ...
在里面ReversibleString,你创造.reverse()。此方法反转包装的字符串.data并将结果重新分配回.data. 从外部看,调用的.reverse()工作就像将字符串反转到位。然而,它实际上做的是创建一个新的字符串,以相反的顺序包含原始数据。 以下是ReversibleString实践中的工作原理: >>>letters="AaBbCcDd">>>#Getallcharactersrely...
def reverse(data): for index in range(len(data)-1, -1, -1): yield data[index] for char in reverse('giraffe'): print(char) 生成器表达式 生成器表达式是列表推导式的语法糖,用于创建生成器而不是列表。 squares = (x**2 for x in range(10)) print(next(squares)) ...
>>>sum(x**2forxinrange(4))14>>>sorted(x**2forxinrange(4))[0,1,4,9]>>>sorted((x**2forxinrange(4)),reverse=True)[9,4,1,0]>>>importmath>>>list(map(math.sqrt,(x**2forxinrange(4)))[0.0,1.0,2.0,3.0] 生成器表达式大体上可以认为是内存空间的优化,它们不需要像方括号的列...
在里面ReversibleString,你创造.reverse()。此方法反转包装的字符串.data并将结果重新分配回.data. 从外部看,调用的.reverse()工作就像将字符串反转到位。然而,它实际上做的是创建一个新的字符串,以相反的顺序包含原始数据。 以下是ReversibleString实践中的工作原理: ...
此函数接受三个参数,与切片运算符中的偏移量具有相同的含义,并返回一个切片对象,表示调用range(start, stop, step). 您可以使用slice()来模拟切片[::-1]并快速反转字符串。继续并slice()在方括号内运行以下调用: 深色代码主题 复制 >>>letters ="ABCDEF">>>letters[slice(None,None, -1)]'FEDCBA' 传递No...
Write a Python program to reverse a range. Sample Solution: Python Code: #https://gist.github.com/fcicq/ddb746042150b4e959e6defreversed_range(start,stop=None,step=1):ifstopisNone:returnrange(start-step,-step,-step)else:new_start=stop-((stop-start-1)%step+1)new_end=new_start-(stop-...
Iterating over the items of an iterable in reverse or sorted order is also a common requirement in programming. To achieve this, you can combine a for loop with the built-in reversed() or sorted() function, respectively.Note: To learn more about reversed() and sorted(), check out the ...
PUBLIC、LOOPBACK 等运行示例# 运行脚本python simple1.py# 输入网段Please input an IP or net-range: 192.168.1.0/24Network: 192.168.1.0Netmask: 255.255.255.0Broadcast: 192.168.1.255Reverse Address: 1.168.192.in-addr.arpa.Subnet: 256# 输入单个 IP 地址Please input an IP or net-range...