Question

如果你们能帮助我如何使用python中的csv模块使用该行内的唯一购买ID来读取csv文件中的行，我将不胜感激。 This is the format my csv file is in

这就是我写入csv文件的方式（如果有帮助的话）。

      userNames = input("What are the full names of the people you are ordering tickets for? ")
  localTime = time.asctime(time.localtime(time.time()) )
  with open("Purchases.csv", "a") as f:
     f.write(f"\n{userNames}, {ticketList[0]}, {ticketList[1]}, {ticketList[2]}, {ticketList[3]}, {totalCost}, {localTime}, {uniqueID}\n")
     print(f"Fantasialand Ticket!")

在这里我需要帮助来读取具有唯一ID的行：

def searchingForFile():
  iUniqueID = int(input("What is the Unique ID of the past purchase?")
  with open("Purchases.csv", mode="rt", encoding='ascii') as f:
     spamreader = csv.reader(f, delimiter=' ', quotechar='|')
     for row in spamreader :
        print(' '.join(row))

Answer 1

唯一ID似乎是CVS中的最后一列：

const changeSelectValue = (state, action) => {
switch (action.id) {
    case 'myFirstKey':
        updatedState = {
            ...state,
            myFirstKey: action.value
        }
    case 'mySecondKey':
        updatedState = {
            ...state,
            mySecondKey: action.value
        }
        break;
    default:
        break;
}}

在旁注：我强烈建议使用def searchingForFile(): iUniqueID = int(input("What is the Unique ID of the past purchase?") with open("Purchases.csv", mode="rt", encoding='ascii') as f: spamreader = csv.reader(f, delimiter=' ', quotechar='|') is_first_row = True for row in spamreader : print(' '.join(row)) # if you have a header row if is_first_row: # skip if header is_first_row = False else: uid = int(row[-1]) if uid == iUniqueID: return row return None（或csv.DictWriter）来编写CSV文件。它将进行转义，正确的方言等操作。

Answer 2

您可以简单地检查行中是否包含该元素，

def searchingForFile():
  iUniqueID = int(input("What is the Unique ID of the past purchase?")
  with open("Purchases.csv", mode="rt", encoding='ascii') as f:
     spamreader = csv.reader(f, delimiter=' ', quotechar='|')
     for row in spamreader :
         if iUniqueID in row: 
             print(' '.join(row))

或检查特定单元格中的值：

def searchingForFile():
  iUniqueID = int(input("What is the Unique ID of the past purchase?")
  with open("Purchases.csv", mode="rt", encoding='ascii') as f:
     spamreader = csv.reader(f, delimiter=' ', quotechar='|')
     for row in spamreader :
         if iUniqueID == row[-1]: 
             print(' '.join(row))

使用唯一ID从csv文件读取一行

2 个答案: