我試圖手動輸入一個 Carmodel，當它在定義的區域內找到時，在第一個區域內尋找另一個名為“Date”的子區域，然后在它之后添加帶有以下字符串“For rent”的行。像這樣的東西（請看下面用 # 突出顯示的預期輸出，在 example.txt 中）#Region1 starts hereCarname?"Ford Ranger"Color "Red"Mileage "1024"#Subregion1 starts hereDate11/02/2018/#Subregion1 ends here#Region1 ends here#Add line here "For rent"#Region2 starts hereCarname?"Toyota Prius"Color "Red"Mileage "1024"#Subregion2 starts hereDate10/06/2019/#Subregion2 ends here#Region2 ends here#Add line here "For rent"此列表在 .txt 文件中持續了數百個條目，每個 Carname 代表一個具有自己的子區域的新區域。但它應該一次只定位 1 個，因為它應該尋找手動用戶輸入。對于上面的例子，手動輸入將是：“Ford Ranger”這是我嘗試過的，但我被卡住了：transitions = dict()in_region = Falsereg_end = -1current_title = Nonecarmodel = input("input carmodel:")with open("example.txt","r") as testfile:? ? content = testfile.readlines()for idx, line in enumerate(content):? ? if line.startswith('Carname'):? ? #if line.startswith ('Date') within the input 'Carmodel'? ? #if line.endswith ('/') within the Date region? ? ? ? # Commit last transition before this to dict, if any? ? ? ? if current_title:? ? ? ? ? ? transitions[reg_end] = current_title? ? ? ? # add suffix for printing? ? ? ? current_title = 'For rent\n'? ? elif line.strip().startswith(carmodel):? ? ? ? in_region = True? ? ? ? # This will be overwritten while we remain in the region? ? ? ? reg_end = idx? ? elif in_region:? ? ? ? in_region = Falseif current_title:? ? transitions[reg_end] = current_titlewith open("example.txt", "w") as output:? ? for idx, line in enumerate(content):? ? ? ? output.write(line)? ? ? ? if idx in transitions:? ? ? ? ? ? output.write(transitions[idx])任何幫助，將不勝感激。謝謝！
1 回答
慕容森
TA貢獻1853條經驗 獲得超18個贊
你可以嘗試這樣的事情。
transitions = dict()
in_region = False
reg_end = -1
current_title = None
carmodel = input("input carmodel:")
with open("example.txt","r") as testfile:
content = testfile.readlines()
find_date_line=False
for idx, line in enumerate(content):
if find_date_line:
if line.strip().startswith('/'):
reg_end = idx
find_date_line = False
else:
if line.startswith('Carname'):
#if line.startswith ('Date') within the input 'Carmodel'
#if line.endswith ('/') within the Date region
# Commit last transition before this to dict, if any
if current_title:
transitions[reg_end] = current_title
# add suffix for printing
current_title = 'For rent\n'
elif line.strip().startswith(carmodel):
in_region = True
# This will be overwritten while we remain in the region
# reg_end = idx
find_date_line=True
elif in_region:
in_region = False
if current_title:
transitions[reg_end] = current_title
with open("example.txt", "w") as output:
for idx, line in enumerate(content):
output.write(line)
if idx in transitions:
output.write(transitions[idx])
當你提供輸入時
"Ford Ranger"
輸出文件會像
#Region1 starts here
Carname
"Ford Ranger"
Color "Red"
Mileage "1024"
#Subregion1 starts here
Date
11/02/2018
/
For rent
#Subregion1 ends here
#Region1 ends here
#Add line here "For rent"
#Region2 starts here
Carname
"Toyota Prius"
Color "Red"
Mileage "1024"
#Subregion2 starts here
Date
10/06/2019
/
#Subregion2 ends here
#Region2 ends here
#Add line here "For rent"
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