django中admin模組中修改密碼的form

django中admin模組中修改密碼的form，參考

• 這個檔案在E:\django5env\Lib\site-packages\django\contrib\auth\forms.py ，其中寫了好幾個關於form的，可以參考其驗證、錯誤資訊等方法

class PasswordChangeForm(SetPasswordForm):
    """
    A form that lets a user change their password by entering their old
    password.
    """

    error_messages = {
        **SetPasswordForm.error_messages,
        "password_incorrect": _(
            "Your old password was entered incorrectly. Please enter it again."
        ),
    }
    old_password = forms.CharField(
        label=_("Old password"),
        strip=False,
        widget=forms.PasswordInput(
            attrs={"autocomplete": "current-password", "autofocus": True}
        ),
    )

    field_order = ["old_password", "new_password1", "new_password2"]

    def clean_old_password(self):
        """
        Validate that the old_password field is correct.
        """
        old_password = self.cleaned_data["old_password"]
        if not self.user.check_password(old_password):
            raise ValidationError(
                self.error_messages["password_incorrect"],
                code="password_incorrect",
            )
        return old_password