抓取一個關鍵字和Python中的關鍵字之間的文本

Question

我想說的是，這個地方幫助我比我還原得更多。我想對所有在過去幫助過我的人表示感謝:)。

我想從特定的樣式消息中劃出一些文本。這是格式化這樣的：

DATA|1|TEXT1|STUFF: some random text||||| 
DATA|2|TEXT1|THINGS: some random text and||||| 
DATA|3|TEXT1|some more random text and stuff||||| 
DATA|4|TEXT1|JUNK: crazy randomness||||| 
DATA|5|TEXT1|CRAP: such random stuff I cant believe how random||||| 

我有如下所示的代碼結合了文本添加單詞之間的空間，並將其添加到一個名爲「TEXT」字符串，它看起來像這樣：

STUFF: some random text THINGS: some random text and some more random text and stuff JUNK: crazy randomness CRAP: such random stuff I cant believe how random 

我需要它這樣形成：

DATA|1|TEXT1|STUFF: ||||| 
DATA|2|TEXT1|some random text||||| 
DATA|3|TEXT1|THINGS: ||||| 
DATA|4|TEXT1|some random text and||||| 
DATA|5|TEXT1|some more random text and stuff||||| 
DATA|6|TEXT1|JUNK: ||||| 
DATA|7|TEXT1|crazy randomness||||| 
DATA|8|NEWTEXT|CRAP: ||||| 
DATA|9|NEWTEXT|such random stuff I cant believe how random||||| 

行號很容易，我已經完成以及carraige返回。我需要的是抓住「CRAP」並將「TEXT1」部分改爲「NEWTEXT」。

我的代碼掃描尋找關鍵字字符串，然後將其添加到自己的線路，然後增加在它們下面的文本，然後在自己的行等下一個關鍵詞這裏是我的代碼，我到目前爲止有：

#this combines all text to one line and adds to a string 
while current_segment.move_next('DATA') 
    TEXT = TEXT + " " + current_segment.field(4).value 

KEYWORD_LIST = [STUFF:', THINGS:', JUNK:'] 
KEYWORD_LIST1 = [CRAP:'] 

#this splits the words up to search through 
TEXT_list = TEXT.split(' ') 

#this searches for the first few keywords then stops at the unwanted one 
for word in TEXT_list: 
    if word in KEYWORD_LIST: 
     my_output = my_output + word 
    elif word in KEYWORD_LIST1: 
     break 
    else: 
     my_output = my_output + ' ' + word 

#this searches for the unwanted keywords leaving the output blank until it reaches the wanted keyword 
for word1 in TEXT_list: 
    if word1 in KEYWORD_LIST: 
     my_output1 = '' 
    elif word1 in KEYWORD_LIST1: 
     my_output1 = my_output1 + word1 + '\n' 
    else: 
     my_output1 = my_output1 + ' ' + word1 

#my_output is formatted back the way I want deviding up the text into 65 or less character lines 

MAX_LENGTH = 65 
my_wrapped_output = wrap(my_output,MAX_LENGTH) 
my_wrapped_output1 = wrap(my_output1,MAX_LENGTH) 
my_output_list  = my_wrapped_output.split('\n') 
my_output_list1 = my_wrapped_output1.split('\n') 

for phrase in my_output_list: 
    if phrase == "": 
      SetID +=1 
      output = output + "DATA|" + str(SetID) + "|TEXT| |||||" 
    else: 
      SetID +=1 
      output = output + "DATA|" + str(SetID) + "|TEXT|" + phrase + "|||||" 

for phrase2 in my_output_list1: 
    if phrase2 == "": 
      SetID +=1 
      output = output + "DATA|" + str(SetID) + "|NEWTEXT| |||||" 
    else: 
      SetID +=1 
      output = output + "DATA|" + str(SetID) + "|NEWTEXT|" + phrase + "|||||" 

#this populates the fields I need 
value = output 

然後，我在「my_output」和「my_output1」格式中添加「NEWTEXT」字樣。此代碼貫穿每行查找關鍵字，然後將該關鍵字和carraige返回。一旦它獲得另一個「KEYWORD_LIST1」它將停止並刪除其餘文本，然後開始下一個循環。我的問題是，上面的代碼給我這樣的：

DATA|1|TEXT1|STUFF: ||||| 
DATA|2|TEXT1|some random text||||| 
DATA|3|TEXT1|THINGS: ||||| 
DATA|4|TEXT1|some random text and||||| 
DATA|5|TEXT1|some more random text and stuff||||| 
DATA|6|TEXT1|JUNK: ||||| 
DATA|7|TEXT1|crazy randomness||||| 
DATA|8|NEWTEXT|crazy randomness||||| 
DATA|9|NEWTEXT|CRAP: ||||| 
DATA|10|NEWTEXT|such random stuff I cant believe how random||||| 

它是從「KEYWORD_LIST1」之前抓住了文本並將其添加到使用newText部分。我知道有一種方法可以根據關鍵字和文本創建組，但我不清楚如何實施它。任何幫助將非常感激。

謝謝。

這是我必須做的就是它爲我工作：

KEYWORD_LIST = ['STUFF:', 'THINGS:', 'JUNK:'] 
KEYWORD_LIST1 = ['CRAP:'] 

def text_to_message(text): 
    result=[] 
    for word in text.split(): 
     if word in KEYWORD_LIST or word in KEYWORD_LIST1: 
      if result: 
      yield ' '.join(result) 
      result=[] 
      yield word 
     else: 
      result.append(word) 
    if result: 
     yield ' '.join(result) 

def format_messages(messages): 
    title='TEXT1' 
    for message in messages: 
     if message in KEYWORD_LIST: 
      title='TEXT1' 
     elif message in KEYWORD_LIST1: 
      title='NEWTEXT' 
    my_wrapped_output = wrap(message,MAX_LENGTH) 
    my_output_list  = my_wrapped_output.split('\n') 
    for line in my_output_list: 
     if line = '': 
      yield title + '|' 
     else: 
      yield title + '|' + line 

for line in format_messages(text_to_message(TEXT)): 
    if line = '': 
     SetID +=1 
     output = "DATA|" + str(SetID) + "|" 
    else: 
     SetID +=1 
     output = "DATA|" + str(SetID) + "|" + line 

#this is needed instead of print(line) 
value = output 

Answer 1

1. 一般提示：不要試圖accretively建立字符串是這樣的：

   my_output = my_output + ' ' + word 
   

   代替

   ，使my_output列表，將word附加到列表中，然後 然後在最後完成單個加入：my_output = ' '.join(my_output)。 （例如，請參閱下面的text_to_message代碼。） 使用連接是the right way to build strings。延遲字符串的創建很有用，因爲處理子字符串列表比分割和分割字符串更愉快，並且必須在這裏和那裏添加空格和回車符。

2. 研究generators。它們很容易理解，並且在處理這樣的文本時可以幫助你很多。

---

import textwrap 

KEYWORD_LIST = ['STUFF:', 'THINGS:', 'JUNK:'] 
KEYWORD_LIST1 = ['CRAP:'] 

def text_to_message(text): 
    result=[] 
    for word in text.split(): 
     if word in KEYWORD_LIST or word in KEYWORD_LIST1: 
      if result: 
       yield ' '.join(result) 
       result=[] 
      yield word 
     else: 
      result.append(word) 
    if result: 
     yield ' '.join(result) 

def format_messages(messages): 
    title='TEXT1' 
    num=1 
    for message in messages: 
     if message in KEYWORD_LIST: 
      title='TEXT1' 
     elif message in KEYWORD_LIST1: 
      title='NEWTEXT' 
     for line in textwrap.wrap(message,width=65): 
      yield 'DATA|{n}|{t}|{l}'.format(n=num,t=title,l=line) 
      num+=1 

TEXT='''STUFF: some random text THINGS: some random text and some more random text and stuff JUNK: crazy randomness CRAP: such random stuff I cant believe how random''' 

for line in format_messages(text_to_message(TEXT)): 
    print(line)