[英]How do I perform a math operation on a Python Pandas dataframe column, but only if a certain condition is met?
[英]how do i perform a math operation in django?
当用户从他们的main balance
中提取任何金额时,我正在尝试计算new_balance
。
我正在尝试在提交表单时执行此操作,但我不知道这是否是执行此操作的完美方式。 这就是我想要达到的目标。
def withdrawal_request(request):
...
if request.method == "POST":
form = WithWithdrawalRequestForm(request.POST)
if form.is_valid():
new_form = form.save(commit=False)
new_form.user = request.user
if new_form.amount > all_earning:
messages.warning(request, "You cannot withdraw more than what is in your wallet balance.")
return redirect("core:withdrawal-request")
elif pending_payout > new_balance:
messages.warning(request, "You have reached your wallet limit")
return redirect("core:withdrawal-request")
else:
new_form.save()
new_balance = new_balance - new_form.amount
messages.success(request, f"Withdrawal Request Is Been Processed...")
return redirect("core:withdrawal-request")
else:
form = WithWithdrawalRequestForm(request.POST)
context = {
"form":form,
"new_balance":new_balance,
}
return render(request, "core/withdrawal-request.html", context)
我实际上又少了一行
else:
new_form.save()
request.user.profile.main_all_earning = main_all_earning - new_form.amount
request.user.profile.save()
messages.success(request, f"Withdrawal Request Is Been Processed...")
return redirect("core:withdrawal-request")
else:
new_form.save()
new_balance = new_balance - new_form.amount
messages.success(request, f"Withdrawal Request Is Been Processed...")
return redirect("core:withdrawal-request")
else:
form = WithWithdrawalRequestForm(request.POST)
context = {
"form":form,
"new_balance":new_balance,
}
return render(request, "core/withdrawal-request.html", context)
您将在上方else
语句的末尾返回,因此您无法到达更新context
的行。 在 Python 中,函数在返回后退出。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.