Python：你究竟如何取一个字符串，将其拆分、反转并重新连接在一起？
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Python: How exactly can you take a string, split it, reverse it and join it back together again?
提问by Tstrmwarrior
How exactly can you take a string, split it, reverse it and join it back together again without the brackets, commas, etc. using python?
使用python，如何在没有括号、逗号等的情况下取出一个字符串、拆分它、反转它并将其重新连接在一起？
采纳答案by Mad Scientist
>>> tmp = "a,b,cde"
>>> tmp2 = tmp.split(',')
>>> tmp2.reverse()
>>> "".join(tmp2)
'cdeba'
or simpler:
或更简单：
>>> tmp = "a,b,cde"
>>> ''.join(tmp.split(',')[::-1])
'cdeba'
The important parts here are the split functionand the join function. To reverse the list you can use reverse(), which reverses the list in place or the slicing syntax [::-1]which returns a new, reversed list.
这里的重要部分是split 函数和join 函数。要反转列表，您可以使用reverse()，它将列表反转到位，或者使用切片语法[::-1]返回一个新的反转列表。
回答by unutbu
Do you mean like this?
你的意思是这样吗？
import string
astr='a(b[c])d'
deleter=string.maketrans('()[]',' ')
print(astr.translate(deleter))
# a b c d
print(astr.translate(deleter).split())
# ['a', 'b', 'c', 'd']
print(list(reversed(astr.translate(deleter).split())))
# ['d', 'c', 'b', 'a']
print(' '.join(reversed(astr.translate(deleter).split())))
# d c b a
回答by Tony Veijalainen
You mean this?
你是这个意思？
from string import punctuation, digits
takeout = punctuation + digits
turnthis = "(fjskl) 234 = -345 089 abcdef"
turnthis = turnthis.translate(None, takeout)[::-1]
print turnthis
回答by Ruman Khan
I was asked to do so without using any inbuilt function. So I wrote three functions for these tasks. Here is the code-
我被要求在不使用任何内置函数的情况下这样做。所以我为这些任务写了三个函数。这是代码-
def string_to_list(string):
'''function takes actual string and put each word of string in a list'''
list_ = []
x = 0 #Here x tracks the starting of word while y look after the end of word.
for y in range(len(string)):
if string[y]==" ":
list_.append(string[x:y])
x = y+1
elif y==len(string)-1:
list_.append(string[x:y+1])
return list_
def list_to_reverse(list_):
'''Function takes the list of words and reverses that list'''
reversed_list = []
for element in list_[::-1]:
reversed_list.append(element)
return reversed_list
def list_to_string(list_):
'''This function takes the list and put all the elements of the list to a string with
space as a separator'''
final_string = str()
for element in list_:
final_string += str(element) + " "
return final_string
#Output
text = "I love India"
list_ = string_to_list(text)
reverse_list = list_to_reverse(list_)
final_string = list_to_string(reverse_list)
print("Input is - {}; Output is - {}".format(text, final_string))
#op= Input is - I love India; Output is - India love I
Please remember, This is one of a simpler solution. This can be optimized so try that. Thank you!
请记住，这是一种更简单的解决方案。这可以优化，所以试试吧。谢谢！
