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1Python Regular Expressions, find Email Domain in Address
2'blahblah@gmail.com'
3	
4'@gmail.com'
5	
6.
7	
8import re
9test_string = 'blahblah@gmail.com'
10domain = re.search('@*?.', test_string)
11print domain.group()
12	
13' # begin to define the pattern I'm looking for (also tell python this is a string)
14
15  @ # find all patterns beginning with the at symbol ("@")
16
17  * # find all characters after ampersand
18
19  ? # find the last character before the period
20
21   # breakout (don't use the next character as a wild card, us it is a string character)
22
23  . # find the "." character
24
25  ' # end definition of the pattern I'm looking for (also tell python this is a string)
26
27  , test string # run the preceding search on the variable "test_string," i.e., 'blahblah@gmail.com'
28	
29import re
30s = 'My name is Conrad, and blahblah@gmail.com is my email.'
31domain = re.search("@[w.]+", s)
32print domain.group()
33	
34@gmail.com
35	
36>>> re.search('@.*', test_string).group()
37'@gmail.com'
38	
39>>> '@' + test_string.split('@')[1]
40'@gmail.com'
41	
42"@"+'blahblah@gmail.com'.split("@")[-1]
43	
44>>> s="bal@gmail.com"
45>>> s[ s.find("@") : ]
46'@gmail.com'
47>>>
48	
49f=open("file")
50for line in f:
51    words= line.split()
52    if "@" in words:
53       print "@"+words.split("@")[-1]
54f.close()