将字符串拆分为 k 大小重叠字符串的Python程序

给定一个字符串，任务是编写一个Python程序，根据大小 K 从原始字符串提取重叠的连续字符串切片。

例子：

Input : test_str = ‘Geeksforgeeks’, K = 4

Output : [‘Geek’, ‘eeks’, ‘eksf’, ‘ksfo’, ‘sfor’, ‘forg’, ‘orge’, ‘rgee’, ‘geek’, ‘eeks’]

Explanation : Consecutive overlapping 4 sized strings are output.

Input : test_str = ‘Geeksforgeeks’, K = 6

Output : [‘Geeksf’, ‘eeksfo’, ‘eksfor’, ‘ksforg’, ‘sforge’, ‘forgee’, ‘orgeek’, ‘rgeeks’]

Explanation : Consecutive overlapping 6 sized strings are output.

方法一：使用islice() +生成器函数+ join()  

在这种情况下，使用 islice() 提取大小为 K 的窗口，并使用 yield 以中间方式产生结果。使用 join() 连接最终结果。

Python3

# Python3 code to demonstrate working of
# Overlapping consecutive K splits
# Using islice() + generator function + join() 
from itertools import islice
  
# generator function 
def over_slice(test_str, K):
    itr = iter(test_str)
    res = tuple(islice(itr, K))
    if len(res) == K:
        yield res    
    for ele in itr:
        res = res[1:] + (ele,)
        yield res
  
# initializing string
test_str = 'Geeksforgeeks'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing K 
K = 4
  
# calling generator function 
res = ["".join(ele) for ele in over_slice(test_str, K)]
  
# printing result
print("Overlapping windows : " + str(res))

输出：

The original string is : Geeksforgeeks

Overlapping windows : [‘Geek’, ‘eeks’, ‘eksf’, ‘ksfo’, ‘sfor’, ‘forg’, ‘orge’, ‘rgee’, ‘geek’, ‘eeks’]

方法二：使用列表推导+切片

在这个例子中，中间切片是使用切片操作以更pythonic的方式执行的。使用切片符号提取每个窗口。

蟒蛇3

# Python3 code to demonstrate working of
# Overlapping consecutive K splits
# Using list comprehension + slicing
  
# initializing string
test_str = 'Geeksforgeeks'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing K 
K = 4
  
# extracting window using slicing
res = [test_str[idx:idx + K] for idx in range(len(test_str) - K + 1)]
  
# printing result
print("Overlapping windows : " + str(res))

输出：

The original string is : Geeksforgeeks

Overlapping windows : [‘Geek’, ‘eeks’, ‘eksf’, ‘ksfo’, ‘sfor’, ‘forg’, ‘orge’, ‘rgee’, ‘geek’, ‘eeks’]