CODEWITHSUNDEEP
python
user4530588
user4530588

Reputation:

How to see if something( a variable ) is set?

Here is my code:

for msg in mbox:
        try:
            pprint.pprint(msg._headers, stream = f)
            tempdate = parser.parse(msg['Date'])
            newdate = str(tempdate)[:19]
            ip = msg['x-originating-ip']
            iplookup = (ip.strip("[]"))
            url = 'http://freegeoip.net/json/{}'.format(iplookup)
            response = urllib.request.urlopen(url).read()
            result = json.loads(response.decode('utf8'))
            f.write ('Country = ' + (result['country_name']) + '\n')
            f.write ('Region = ' + (result['region_name']) + '\n')
            f.write ('City = ' + (result['city']) + '\n')

However, not all emails have originiting IP. how can i check to see if the x orginiting ip is set? Something like an IF staement

       ip = msg['x-originating-ip']

       if (isset(ip):
           iplookup = (ip.strip("[]"))
            url = 'http://freegeoip.net/json/{}'.format(iplookup)
            response = urllib.request.urlopen(url).read()
            result = json.loads(response.decode('utf8'))
            f.write ('Country = ' + (result['country_name']) + '\n')
            f.write ('Region = ' + (result['region_name']) + '\n')
            f.write ('City = ' + (result['city']) + '\n')
        else:
             continue

Thats an example i thought of, but the isset function is from php, not python? Any ideas?

Upvotes: 1

Views: 78

Answers (2)

André Laszlo
André Laszlo

Reputation: 15537

Try

if 'x-originating-ip' in msg:
    ...

It uses the in operator. It only checks if the key is set, not what the value is - so it can still be None or False or an empty string or list or something. You can also use 'foo' not in x instead of not 'foo' in x.

If you want to check that it's not None at the same time, for example, use get() instead:

if msg.get('x-originating-ip') is not None:
    ...

Upvotes: 1

Neel
Neel

Reputation: 21241

You can check value of x-originating-ip is set or not using get.

ip = msg.get('x-originating-ip')
if ip: 
    ...
    ....

Upvotes: 0

Related Questions