I want to delete a specific line from the CSV file.

file=open("Automobile_data.csv", "r")
    lines=file.readlines()
    file.close()

    outfile=open("Automobile_data.csv", "w")
    size = lines.__len__()
    for i in range (size-1):
        if i=="x":
            continue
        else:
            outfile.write(lines[i])


    outfile.close()

file=open("Automobile_data.csv", "r")
    lines=file.readlines()
    file.close()

    outfile=open("Automobile_data.csv", "w")
    size = lines.__len__()
    for i in range (size-1):
        lineData=lines[i].split(", ")// Separate line i of the input file with commas
        If lineData[0] == x:// If the first item (car number) divided matches the number (x) of the car you want to buy,
            continue // Do not write that line.
        else:      
            outfile.write(lines[i])// The line does not match the number of the car you want to buy, so write it to the file.

    outfile.close()//Close the file last

import csv

#### Load the csv file first, regardless of process, as a two-dimensional list
with open('Automobile_data.csv', 'r', newline=') ascsvfile:
    header=next(csvfile)
    fullldata = [l for link csv.reader(csvfile)]

options=input("Please enter 1 if you are a buyer and please enter 2 if you are a dealer")

if options=="1":

    Range=input("Input 1 if you are looking for a car that costs between $0 to $15000\n"
                  "Input 2 if you are looking for the one costs between $15000 to $30,000\n"
                  "Input 3 if you are looking for the one costs more than $30,000:")

    pecerangeL = 0
    pricerangeH = 15000
    if Range=="2":
        pricerangeL = 15000
        pricerangeH=30000
    elif Range=="3":
        pricerangeL=30000
        pricerangeH = 10000000

    #### Extract vehicle information in the selected price range and list its index number separately.
    selected = [l for lin fullldata if [9]!='and int(l[9])<=pricerangeHandint(l[9])>=pricerangeL]
    sellindex = [l[0] for lin selected ]

    #### display car information for the selected price range
    For lin selected:
        print(l)

    x = input("Please enter the number of the car would like to buy or enter exit:")

    if x == "exit":
        quit()

    #### Exits if the specified index number does not exist in the selected price range list
    elif x not in selindex:
        print('The car with that number does not exist is out of range.')
        quit()

    else: #### This part is 相当 Equivalent new processing
        #### Create a new list excluding car information for the specified index number
        newdata=[l for lin fullldata if[0]!=x]

        #### Export the entire new list as a csv file with a header
        with open('Automobile_data.csv', 'w', newline=') ascsvfile:
            csvfile.write(header)
            writer=csv.writer(csvfile)
            writer.writerows (newdata)

elif options=="2":

    #### Separate list of all index numbers of information in the csv file
    fullindex=[l[0]for lin fullldata]

    Index=input("Index:")

    #### Determine if the index number already exists and exit if it exists
    #### (You can rewrite the existing information, but it will be complicated, so I will not answer this question.)
    if Index in fullindex:
        print('That index already exists.')
        quit()

    Company= input ("Company:")
    BodyStyle=input("BodyStyle:")
    WheelBase=input("WheelBase:")
    Length = input ("Length:")
    EngineType=input("EngineType:")
    NumCyl= input ("Number of Cylinder:")
    HorsePW = input ("Horsepower:")
    AV_mil=input("AverageMileage:")
    Price=input("Price:")

    NewCar= [Index, Company, BodyStyle, WheelBase, Length, EngineType, NumCyl, HorsePW, AV_mil, Price]
    with open('Automobile_data.csv', 'a', newline=') asf:
        writer=csv.writer(f)
        writer.writerow (NewCar)
    #### Remove unnecessary f.close()

import sys
import re

CAR_CSV_FILE = 'Automobile_data.csv'

def user_input(prompt):
  try:
    ret=input(prompt)
  except EOFError:
    print('done', file=sys.stderr)
    sys.exit(0)
  return ret

def user_input_integer(prompt):
  try:
    n=int(user_input(prompt))
  exceptValueError as:
    print(e,file=sys.stderr)
    sys.exit(1)
  return n

def buyer():
  price_range=(0,15000), (15000,30000), (30000,float('inf'))))
  p =iter(sum(price_range,()))
  prange=user_input_integer(f'''
    Input 1 if you are looking for a car that costs between ${next(p)} to ${next(p)}
    Input2 if you are looking for the one costs between ${next(p)} to ${next(p)}
    Input3 if you are looking for the one costs more than ${next(p)}
    ? ''.replace('', '))
  if prange<1 or prange>len(price_range): quit()
  prange-=1
  with open(CAR_CSV_FILE, 'r') asf:
    car_data=f.readlines()
  for car in car_data[1:]:
    car=car.trip()
    price=car.split(',')[-1].trip()
    try:
      price=int(price)
    exceptionValueError:
      continue
    if price_range [range][0]<=price<=price_range [range][1]:
      print(car)

  no = user_input(
    'Please enter the number of the car would like to buy or enter exit:')
  if no.trip() == 'exit': quit()
  with open(CAR_CSV_FILE, 'w') as outfile:
    outfile.write(
      ''.join(car for car in car_data if not re.match(rf'^{no},',car)))

def dealer():
  prompts =(
    'Index:', 'Company:', 'Body Style:', 'Wheel Base:', 'Length:',
    'Engine Type:', 'Number of Cylinder:', 'Horsepower:',
    'Average Mileage:', 'Price:')
  new_car = [ ]
  for pin prompts:
    new_car.append(user_input(p))
  with open(CAR_CSV_FILE, 'a') as outfile:
    outfile.write(','.join(new_car))

if__name__=='__main__':
  prompt='Please enter 1 if you are a buyer and please enter 2 if you are a dealer:'
  n=user_input_integer(prompt)
  if n == 1:
    buyer()
  elifn==2:
    dealer()