從文本文件（Python）中刪除大塊文本

Question

我正在尋找代碼解決方案。我需要使用python刪除一段文件，這裏有5行代碼。

Numberplate: BN30CWS 

Time In: Time In: 11:11:3 

Time Out: Time In: 11:11:51 

Speed: Your Speed: 48MPH 

Was this vechile speeding?: No 

（無縫隙）

所以，如果我進入BN30CWS我想那些5行從文件（fileDocStandard）請幫忙刪除，我試圖做4小時，該工作代碼現在，這就是我今天來了，但它只是刪除1行，不會刪除孔塊

def deldata(): 
file = open(fileDocStandard, "r") 
array = [] 
for line in file: 
    array.append(line) 
file.close() 

for i in range(len(array)): 
    print (array[i]) 
let = input("Please enter the plate you want to delete ") 
let = let.upper() 
for i in range(len(array)): 
    arrayitem = array[i] 

    if (arrayitem[0]) == (let): 
     del (array[i]) 
     break 
file = open(fileDocStandard, "w") 
file.close() 
file = open(fileDocStandard, "a") 
for i in range(len(array)): 
    file.write(array[i]) 
file.close() 

任何人看到這個問題，並能幫助我終於完成這個？

Answer 1

您可以閱讀您的線條，直到您到達BN30CWS所在的線條。然後使用itertools.islice通過未來5行，寫你的線條一個新的文件中：

from itertools import islice 

with open(fileDocStandard) as f,open(newfile) as out: 
    for line in f: 
     if 'BN30CWS' in f: 
      f=islice(f,5,None) 
     out.write(line) 

如果你想覆蓋該文件可以使用tempfile：

with tempfile.NamedTemporaryFile(delete=False) as outfile: 
    with open(fileDocStandard) as f: 
     for line in outfile: 
      if 'BN30CWS' in line: 
       outfile=islice(outfile,5,None) 
      out.write(line) 
    os.rename(outfile.name, fileDocStandard)