Python regex to remove capture email between dashes or ignore emails ending with .jpg etc
Question
I am trying to figure out how to improve the regex to only get emails not ending with ".jpg" and to remove -- from both left and right part of the emails if any is found. Example parameter as source which is a string.
<html>
<body>
<p>aaa@example.jpg</p>
<p>--bbb@example.com--</p>
<p>ccc@example.com--</p>
<p>--ddd@example.com</p>
</body>
</html>
The result should contain: bbb@example.com, ccc@example.com, ddd@example.com So basically, I want to see anyway to improve this function so the regex would could produce emails without -- and if possible improve the if not email[0].endswith('.png') in case i want to add more, this could look urgly.
def extract_emails(source):
regex = re.compile(r'([\w\-\.]{1,100}@(\w[\w\-]+\.)+[\w\-]+)')
emails = list(set(regex.findall(source.decode("utf8"))))
all_emails = []
for email in emails:
if not email[0].endswith('.png') and not email[0].endswith('.jpg') \
and not email[0].endswith('.gif') and not email[0].endswith('.rar')\
and not email[0].endswith('.zip') and not email[0].endswith('.swf'):
all_emails.append(email[0].lower())
return list(set(all_emails))
3 answers
solution1
2 2015-12-03 10:39:30
I think top level domains are few so you can use alternation
s="""<html>
<body>
<p>aaa@example.jpg</p>
<p>--bbb@example.com--</p>
<p>ccc@example.com--</p>
<p>--ddd@example.com</p>
</body>
</html>"""
print re.findall(r"-*([\w\.]{1,100}@\w[\w\-]+\.+com|biz|us|bd)-*",s)
['bbb@example.com', 'ccc@example.com', 'ddd@example.com']
see DEMO
or try \\w+@\\w+\\.(?!jpg|png)\\w+\\.*\\w*
s="""<html>
<body>
<p>aaa@example.jpg</p>
<p>--bbb@example.com--</p>
<p>ccc@example.com--</p>
<p>--ddd@example.com</p>
</body>
</html>"""
print re.findall(r"\w+@\w+\.(?!jpg|png)\w+\.*\w*",s)
It is very hard to set constant regex for email verification- Details for email validation go at Using a regular expression to validate an email address it has 69 answers.
solution2
1 ACCPTED 2015-12-03 10:41:47
x="""<html>
<body>
<p>aaa@example.jpg</p>
<p>--bbb@example.com--</p>
<p>ccc@example.com--</p>
<p>--ddd@example.com</p>
</body>
</html>"""
print re.findall(r"-*([\w\-\.]{1,100}@(?:\w[\w\-]+\.)+(?!jpg)[\w]+)-*",x)
Output: ['bbb@example.com', 'ccc@example.com', 'ddd@example.com']
solution3
0 2015-12-03 10:46:54
The best way to do this is using html parser like BeautifulSoup
In [37]: from bs4 import BeautifulSoup
In [38]: soup = BeautifulSoup('''<html>
....: <body>
....: <p>aaa@example.jpg</p>
....: <p>--bbb@example.com--</p>
....: <p>ccc@example.com--</p>
....: <p>--ddd@example.com</p>
....:
....: </body>
....: </html>''', 'lxml')
In [39]: [email.strip('-') for email in soup.stripped_strings if not email.endswith('.jpg')]
Out[39]: ['bbb@example.com', 'ccc@example.com', 'ddd@example.com']
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