有效载荷是逗号分隔的数据块,表示来自逆变器的读数。这些读数需要存储在一个名为 InverterHistory 的表中。每个字段并不总是有一个值。该模型已设置为允许字段为空/空白。因此,我试图在将其分配给字段之前检查是否存在值。这是我到目前为止所拥有的:
i = Inverter.objects.get(mac=u)
payload.reverse()
try:
ac_volts_a = str(payload.pop())
ac_volts_b = str(payload.pop())
ac_volts_c = str(payload.pop())
ac_current_a = str(payload.pop())
ac_current_b = str(payload.pop())
ac_current_c = str(payload.pop())
dc_volts = str(payload.pop())
dc_current = str(payload.pop())
kw_out = str(payload.pop())
mwh_total = str(payload.pop())
current_time = datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S")
i_data = InverterHistory(
inverter = i,
if ac_volts_a:
voltage_ac_a = float(ac_volts_a),
if ac_volts_b:
voltage_ac_b = float(ac_volts_b),
if ac_volts_c:
voltage_ac_c = float(ac_volts_c),
if ac_current_a:
current_ac_a = float(ac_current_a),
if ac_current_b:
current_ac_b = float(ac_current_b),
if ac_current_c:
current_ac_c = float(ac_current_c),
if dc_volts:
voltage_dc = float(dc_volts),
if dc_current:
current_dc = float(dc_current),
if kw_out:
kwout = float(kw_out),
if mwh_total:
mwh = float(mwh_total),
recordTime = datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S"))
i_data.save()
except Exception, e:
print >> sys.stderr, "Error While Recording Inverter History"
print >> sys.stderr, e
raise Http404
我对python相当陌生,不知道如何正确编码上述内容。当我尝试编译代码时,我在 if 语句开始时遇到错误。我怎样才能修复上面的代码,以便它可以按需要编译和工作?