![](/img/trans.png)
[英]Parse text file and only capture lines between two lines with specific characters
[英]Parse text file between specific lines
因此,如果我有一個看起來像這樣的文本文件,我想創建每個數據塊的列表。
[Blocktype A]
thing
thing
thing
[Blocktype A]
thing
thing
thing
thing
thing
[Blocktype A]
thing
thing
[Blocktype B]
thing
thing
thing
本質上,我希望我的代碼執行此操作。
如果該行=='[[Blocktype A]',則將下一個X數行(可能有所不同)追加到“塊/節”列表中,直到到達換行符為止。 那時,將此“阻止”列表附加到總體列表,清空“阻止”列表,並對下一個Blocktype A節進行相同操作,直到到達新行,等等...我想對'[塊類型B]'。
最后,我試圖獲得一個以子列表為元素的列表。 換句話說,[Blocktype A]列表數據的列表,以及所有[Blocktype B]列表數據的列表
bigListA = [['Blocktype A','thing','thing','thing'],['Blocktype A','thing','thing','thing','thing','thing']等...]
bigListB = 與上面相同
我不確定如何在這樣的特定行之間進行解析。 有任何想法嗎? 非常感謝!
編輯*這是我的代碼。 問題是,['B']節被添加到了原本不應該添加的列表中。 我感覺我的列表清空步驟已關閉。 我剛剛發現的另一個問題是,當我打印出返回列表中的元素時,每個元素都是相同的(僅文件中的第一個塊……只是重復了一次)
def getBlock(myFile):
"""
blah blah blah parses by stanza
"""
print myFile
with open(myFile, 'r') as inFile:
print '~~~ newfile ~~~\n\n'
extraData = list()
blockList = list()
for line in inFile:
if line.strip() == '': # skips extraData, start of data blocks
termBlock = list()
for line in inFile:
if line.strip() == '[A]' and len(termBlock) !=0: # A
blockList.append(termBlock) # appends termBlock to blockList
del termBlock[:] # ensures list is empty for new termBlock
termBlock.append(line.strip())
elif line.strip() == '[B]' and len(termBlock) !=0: # B
del termBlock[:]
termBlock.append(line.strip())
elif line.strip() == '': # skip line if it's blank
continue
else: # add all block data
termBlock.append(line.strip())
else:
metaData.append(line) # adds metaData
return blockList, metaData
我喜歡為此使用生成器函數:
import itertools
from pprint import pprint
def stanzas(f):
stanza = []
for line in f:
line = line.strip()
if line.startswith('['):
if stanza:
yield stanza
stanza = []
if line:
stanza += [line]
if stanza:
yield stanza
with open('foo.ini') as input_file:
all_data = stanzas(input_file)
all_data = sorted(all_data, key = lambda x:x[0])
all_data = itertools.groupby(all_data, key = lambda x:x[0])
all_data = {k:list(v) for k,v in all_data}
# All of the data is in a dict in all_data. The dict keys are whatever
# stanza headers in the file there were.
# We can extract out the bits we want using []
bigListA = all_data['[Blocktype A]']
bigListB = all_data['[Blocktype B]']
pprint(bigListA)
pprint(bigListB)
像這樣:
bigLists = ([z.strip('[').strip(']') for z in y.split('\n') if z]
for y in x.split('\n\n'))
bigListA = [x for x in bigLists if x[0] == 'Blocktype A']
bigListB = [x for x in bigLists if x[0] == 'Blocktype B']
輸出正是您所需要的
def bigList(list_name,start):
quit_ask = ""
list_name = []
l = []
check = True
started = False
with open("TEXT.txt") as text_file:
for line in text_file:
line = line.strip()
if line.startswith(start) or started == True:
while '' in l: l.remove('')
if line.startswith(start):
quit_ask = line
if check != True:
list_name.append(l)
l = []
l.append(line)
started = True
elif line.startswith('[') and line != quit_ask: break
else: l.append(line); check = False
list_name.append(l)
return list_name
bigListA = []
bigListB = []
bigListA = bigList(bigListA,'[Blocktype A]')
bigListB = bigList(bigListB,'[Blocktype B]')
print bigListA
print bigListB
而且您也不必進口任何東西!
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.