try-catch in a while-loop (python)

Question

while var == 1:
    test_url = 'https://testurl.com'
    get_response = requests.get(url=test_url)
    parsed_json = json.loads(get_response.text)
    test = requests.get('https://api.telegram.org/botid/' + 'sendMessage', params=dict(chat_id=str(0815), text="test"))
    ausgabe = json.loads(test.text)
    print(ausgabe['result']['text'])
    time.sleep(3)

How do i put in a try-catch routine to this code, once per 2 days i get an Error in Line 4 at json.loads() and i cant reproduce it. What i´m trying to do is that the while loop is in a "try:" block and an catch block that only triggers when an error occurs inside the while loop. Additionally it would be great if the while loop doesnt stop on an error. How could i do this. Thank you very much for your help. (I started programming python just a week ago)

Did you try using your search engine of choice to look for "python exception handling"? There's plenty of tutorials available — UnholySheep, Jun 14 '17 at 13:08
Yes i did, but nothing that i can test, because the Error is not reproducable by will and just happens after a few days. — wibenji, Jun 14 '17 at 13:23

score 2 · Answer 1 · answered Jun 14 '17 at 13:13

If you just want to catch the error in forth line, a "Try except" wrap the forth line will catch what error happened.

while var == 1:
    test_url = 'https://testurl.com'
    get_response = requests.get(url=test_url)
    try:
        parsed_json = json.loads(get_response.text)
    except Exception as e:
        print(str(e))
        print('error data is {}',format(get_response.text))
    test = requests.get('https://api.telegram.org/botid/' + 'sendMessage', params=dict(chat_id=str(0815), text="test"))
    ausgabe = json.loads(test.text)
    print(ausgabe['result']['text'])
    time.sleep(3)

Thank you for this answer. I´m trying an other answer but will keep this in mind. — wibenji, Jun 14 '17 at 13:25

score 1 · Accepted Answer · answered Jun 14 '17 at 13:09

You can simply

while var == 1:
   try:
       test_url = 'https://testurl.com'
       get_response = requests.get(url=test_url)
       parsed_json = json.loads(get_response.text)
       test = requests.get('https://api.telegram.org/botid/' + 'sendMessage', params=dict(chat_id=str(0815), text="test"))
       ausgabe = json.loads(test.text)
       print(ausgabe['result']['text'])
       time.sleep(3)
   except Exception as e:
       print "an exception {} of type {} occurred".format(e, type(e).__name__)

Thank you very much i will try this and give feedback in a few days. — wibenji, Jun 14 '17 at 13:24

try-catch in a while-loop (python)

2 Answers2