英文:
TypeError in Django: "float () argument must be a string or a number, not 'tuple.'"
问题
以下是您要翻译的内容：
描述：
尝试访问与加密货币（在本例中是狗狗币）相关的特定页面时，我在我的Django应用程序中收到一个TypeError。错误通知中写着：“字段'购买价格'期望一个数字，但却得到了(0.07314770668745041,)”。回溯还说明问题出在float()函数上，并且一个元组被用作参数。
然而，传递的值并不是一个'元组'。它是numpyfloat64类型，因此我尝试在Python中将其转换为float类型后再传递相同的值。即使我提供表单一个静态值，问题仍然会发生。form.instance.bought_at = 45.66也导致了相同的问题。
是否有人可以帮助我理解为什么会发生这个错误以及如何解决它？
以下是相关的代码：
模型代码：
class Order(models.Model):
coin = models.CharField(max_length=100)
symbol = models.CharField(max_length=50)
bought_price = models.FloatField()
quantity = models.IntegerField(default=1)
bought_at = models.DateTimeField(default=datetime.now)
user = models.ForeignKey(User, on_delete=models.CASCADE)
视图代码：
ticker = yf.Ticker(symbols[pk])
price_arr = ticker.history(period='1d')['Close']
price = np.array(price_arr)[0]
if request.method == 'POST':
form = BuyForm(request.POST)
if form.is_valid():
form.instance.coin = ticker.info['name'],
form.instance.symbol = ticker.info['symbol'],
form.instance.bought_price = price,
form.instance.user = request.user
form.save()
return redirect('portfolio')
else:
form = BuyForm()
感谢您提供的任何帮助或见解。谢谢！
英文:
Description:
When attempting to access a specific page that relate to a cryptocurrency, in this case Dogecoin, I receive a TypeError in my Django application. "Field 'bought_price' expected a number but got (0.07314770668745041,)" reads the error notice. The traceback also states that the problem is with the float() function and that a tuple was used as the argument.
The passed value, however, is not a 'tuple'. It is a numpyfloat64 type, therefore I tried passing the same value after converting it to a float type in Python. Even if I provide the form a static value, the problem still occurs. form.instance.bought_at = 45.66 results in the same issue.
Could anyone help me understand why this error is occurring and how I can resolve it?
Here's the relevant code:
Model Code:
class Order(models.Model):
coin = models.CharField(max_length=100)
symbol = models.CharField(max_length=50)
bought_price = models.FloatField()
quantity = models.IntegerField(default=1)
bought_at = models.DateTimeField(default=datetime.now)
user = models.ForeignKey(User, on_delete=models.CASCADE)
View Code:
ticker = yf.Ticker(symbols[pk])
price_arr = ticker.history(period='1d')['Close']
price = np.array(price_arr)[0]
if request.method == 'POST':
form = BuyForm(request.POST)
if form.is_valid():
form.instance.coin = ticker.info['name'],
form.instance.symbol = ticker.info['symbol'],
form.instance.bought_price = price,
form.instance.user = request.user
form.save()
return redirect('portfolio')
else:
form = BuyForm()
I appreciate any assistance or insights you can provide. Thank you!
答案1
得分: 1
问题似乎是尾随逗号将 price 转换为元组。
form.instance.bought_price = price,
应该是
form.instance.bought_price = price
唯一的区别是末尾的逗号。其他赋值行前后可能也需要移除逗号。
查看此问题获取更多信息。
英文:
The problem appears to be the trailing comma turning price into a tuple.
form.instance.bought_price = price,
should be
form.instance.bought_price = price
The only difference is the comma at the end. The other assignment lines before and after probably need their commas removed as well.
Check out this question for more.
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