CZa2sJVe

1I've set up a flask application that checks an API for train information via parameters passed in the URL.
2
3The main lookup part of the function is in this function:
4```
5train_service_data = {}
6train_station_data = {}
7
8dest = 0
9origin = 0
10mytimes = 0
11myurl = 0
12
13
14def checker():
15    global mytrains  # modifies the global copy of mytrains otherwise a new variable is created
16    global myurl
17    global mytimes
18    # myurl = f"http://huxley.apphb.com/all/{origin}/to/{dest}/{mytimes}"
19    response = requests.get(myurl, params={"accessToken": SECRET_KEY})
20    response.raise_for_status()  # this makes an error if something failed
21    data1 = response.json()
22    mytrains['departure'] = str(data1['crs'])
23    mytrains['arrival'] = str(data1['filtercrs'])
24    try:
25        found_service = 0
26        for index, service in enumerate(data1['trainServices']):  # indexes data for pulling of previous values
27            if service['std'].replace(':', '') in mytimes:
28                found_service += 1
29                train = SimpleNamespace(
30                    serviceID=str(service['serviceID']),
31                    arrival_time=str(service['std']),
32                    estimated_arrival=str(service['etd']),
33                    status='On time'
34                )
35                prior_service = data1['trainServices'][index - 1]
36                if train.estimated_arrival == 'Cancelled':
37                    train.status = 'Cancelled'
38                    train.alternate_service = str(prior_service['std'])
39                    train.alternate_status = str(prior_service['etd'])
40                elif train.estimated_arrival != 'On time':
41                    train.status = 'Delayed'
42                write_index = index
43                for i, v in mytrains.items():
44                    if isinstance(v, dict) and v['arrival_time'] == train.arrival_time:
45                        write_index = i
46                mytrains[write_index] = train.__dict__
47            elif found_service == 0:  # if no service is found
48                mytrains['state'] = 'The services currently available are not specified in user_time.'
49    except (TypeError, AttributeError) as error:
50        mytrains['errorMessage'] = 'There is no train service data'
51    try:
52        NRCCRegex = re.compile('^(.*?)[\.!\?](?:\s|$)')  # regex pulls all characters until hitting a . or ! or ?
53        myline = NRCCRegex.search(data1['nrccMessages'][0]['value'])  # regex searches through nrccMessages
54        mytrains['nrcc'] = myline.group(1)  # prints parsed NRCC message
55    except (TypeError, AttributeError) as error:  # tuple catches multiple errors, AttributeError for None value
56        mytrains['nrcc'] = 'No NRCC'
57    return mytrains
58
59```
60
61This then gets split into the location and actual services messages via the following two functions:
62
63```
64def time_trains_services():  # splits data into train services lookup
65    global train_service_data
66    train_service_data = [j for i, j in mytrains.items() if isinstance(j, dict)]  # grabs train service data into dict
67    return train_service_data
68
69
70def time_trains_location():  # splits data into crs, filtercrs and nrcc queries
71    global train_station_data
72    train_station_data = {i: j for i, j in mytrains.items() if not isinstance(j, dict)}  # grabs [0] data into separate dict
73    return train_station_data
74```