Question

我正在使用以下代码。如何添加错误检查。如果有任何错误，请替换继续阅读例如：如果音量为N \ a或缺失，请替换为“值”。不要跳过线，不要停止。

reader = csv.reader(idata.split("\r\n"))

stocks = []
for line in reader:
    if line == '':
        continue

    stock, price, volume, stime = line
    price = float(price)
    volume = int(volume)

    stocks.append((stock, price, volume, stime))

Answer 1

执行以下操作：

def isRecordValid(stock,price,volume,stime):
    #do input validation here, return True if record is fine, False if not.  Optionally raise an Error here and catch it in your loop
    return True

reader = csv.reader(idata.split("\r\n"))

stocks = []
for line in reader:
    if line == '':
        continue

    stock, price, volume, stime = line
    try:
        if isRecordValid(stock,price,volume,stime):
            price = float(price)
            volume = int(volume)
            stocks.append((stock, price, volume, stime))
        except Exception as e:
            print "either print or log and error here, using 'except' means you can continue execution without the exception terminating your current stack frame and being thrown further up"

基本上定义另一种方法（或内联）以验证库存，价格，数量和价格是否符合您的预期。我试图在这里捕获任何错误，以防你的float（）或int（）调用将价格和音量字符串转换为它们的预期类型因任何原因而失败。

python错误检查

1 个答案: