Question

我试图查看多个来源，看看哪个来源有特定条目。

我的输入如下：

json_str2 = urllib2.urlopen(URL2).read()
u = json.loads(json_str2)
#load all five results
One = u['flightStatuses'][0]
Two = u['flightStatuses'][1]
Three = u['flightStatuses'][2]
Four = u['flightStatuses'][3]
Five = u['flightStatuses'][4]

我的if语句正常工作，我得到了正确的结果：

if One['flightNumber'] == str(FlEnd):
    fnumber = One['flightId']
    print fnumber

但是当我添加elif:时，即使第一个语句是True，答案也是错误的（没有）。

我不明白elif为什么不起作用？

# if statement checks each result to define flightId, needed for tracking.
if One['flightNumber'] == str(FlEnd):
    fnumber = One['flightId']
elif Two['flightNumber'] == str(FlEnd):
    fnumber = Two['flightId']
print fnumber

Answer 1

你应该把它写成五个飞行状态的循环，而不是使用五个变量和五个条件。

results = json.loads(urllib2.urlopen(URL2).read())['flightStstuses']
for result in results:
    if result['flightNumber'] == str(FlEnd):
        fnumber = result['flightId']
        break
else:
    fnumber = None
print fnumber

elif声明没有按预期工作

1 个答案: