import re
re.findall("(\ ?1?[ -.]?\(?\d{3}\)?[ -.]?\d{3}[ -.]?\d{4})(?:[ <$])", " 1.222.222.2222<")
The above code works fine if my string ends with a "<" or space. But if it's the end of the string, it doesn't work. How do I get 1.222.222.2222 to return in this condition:
import re
re.findall("(\ ?1?[ -.]?\(?\d{3}\)?[ -.]?\d{3}[ -.]?\d{4})(?:[ <$])", " 1.222.222.2222")
*I removed the "<" and just terminated the string. It returns none in this case. But I'd like it to return the full string -- 1.222.222.2222
POSSIBLE ANSWER:
import re
re.findall("(\ ?1?[ -.]?\(?\d{3}\)?[ -.]?\d{3}[ -.]?\d{4})(?:[ <]|$)", " 1.222.222.2222")
CodePudding user response：
I think you've solved the end-of-string issue, but there are a couple of other potential issues with the pattern in your question:
- the
-in[ -.]either needs to be escaped as\-or placed in the first or last position within square brackets, e.g.[-. ]or[ .-]; if you search for[]in the docs here you'll find the relevant info:
Ranges of characters can be indicated by giving two characters and separating them
by a '-', for example [a-z] will match any lowercase ASCII letter, [0-5][0-9] will match
all the two-digits numbers from 00 to 59, and [0-9A-Fa-f] will match any hexadecimal
digit. If - is escaped (e.g. [a\-z]) or if it’s placed as the first or last character
(e.g. [-a] or [a-]), it will match a literal '-'.
- you may want to require that either matching parentheses or none are present around the first 3 of 10 digits using
(?:\(\d{3}\) ?|\d{3}[-. ]?)
Here's a possible tweak incorporating the above
import re
pat = "^((?:\ 1[-. ]?|1[-. ]?)?(?:\(\d{3}\) ?|\d{3}[-. ]?)\d{3}[-. ]?\d{4})(?:[ <]|$)"
print( re.findall(pat, " 1.222.222.2222") )
print( re.findall(pat, " 1(222)222.2222") )
print( re.findall(pat, " 1(222.222.2222") )
Output:
[' 1.222.222.2222']
[' 1(222)222.2222']
[]
CodePudding user response：
Maybe try:
import re
re.findall("(\ ?1?[ -.]?\(?\d{3}\)?[ -.]?\d{3}[ -.]?\d{4})(?:| |<|$)", " 1.222.222.2222")
nullmatches any position,1.222.222.22221.222.222.2222<matches less-than sign character,1.222.222.2222<$end of line,1.222.222.2222
You can also use regex101 for easier debugging.