find all the matches for unicodes in a string in python

Question

import re

b="united thats weak. See ya 👋"
print b.decode('utf-8')  #output: u'united thats weak. See ya \U0001f44b'

print re.findall(r'[\U0001f600-\U0001f650]',b.decode('utf-8'),flags=re.U) # output: [u'S']

How to get a output \U0001f44b.

Emojis that I need to handle are

😀_❤️_😁_😂_😃_😄_😅_😆_😇_😈_😉_😊_😋_😌_😍_😎_😏_😐_😑_😒_😓_😔_😕_😖_😗_😘_😙_😚_😛_😜_😝_😞_😟_😠_😡_😢_😣_😤_😥_😦_😧_😨_😩_😪_😫_😬_😭_😮_😯_😰_😱_😲_😳_😴_😵_😶_😷_😸_😹_😺_😻_😼_😽_😾_😿_🙀_🙁_🙂_🙃_🙄_🙅_🙆_🙇_🙈_🙉_🙊_🙋_🙌_🙍_🙎_🙏_🚀_🚁_🚂_🚃_🚄_🚅_🚆_🚇_🚈_🚉_🚊_🚋_🚌_🚍_🚎_🚏_🚐_🚑_🚒_🚓_🚔_🚕_🚖_🚗_🚘_🚙_🚚_🚛_🚜_🚝_🚞_🚟_🚠_🚡_🚢_🚣_🚤_🚥_🚦_🚧_🚨_🚩_🚪_🚫_🚬_🚭_🚮_🚯_🚰_🚱_🚲_🚳_🚴_🚵_🚶_🚷_🚸_🚹_🚺_🚻_🚼_🚽_🚾_🚿_🛀_🛁_🛂_🛃_🛄_🛅_🛋_🛌_🛍_🛎_🛏_🛐_🛠_🛡_🛢_🛣_🛤_🛥_🛩_🛫_🛬_🛰_🛳_🤐_🤑_🤒_🤓_🤔_🤕_🤖_🤗_🤘_🦀_🦁_🦂_🦃_🦄_🧀

yes...i was trying to do it...but somehow not able to write a accurate pattern — Sandeep Chitta
– Sandeep Chitta, Commented Dec 1, 2016 at 14:33
can you update your question with all those emojis that you want to match? Thanks. — mrehan
– mrehan, Commented Dec 12, 2016 at 9:47
Hi Qubad....i just need a way to use regex in handling the emojis...its not more about a particular emoji. Thanks for the reply :) — Sandeep Chitta
– Sandeep Chitta, Commented Dec 12, 2016 at 21:57

Robᵩ · Accepted Answer · 2016-12-14 02:16:56Z

Searching for a unicode range works exactly the same as searching for any sort of character range. But, you'll need to represent the strings correctly. Here is a working example:

#coding: utf-8
import re

b=u"united thats weak. See ya 😇 "
assert re.findall(u'[\U0001f600-\U0001f650]',b) == [u'😇']
assert re.findall(ur'[😀-🙏]',b) == [u'😇']

Notes:

You need #coding: utf-8 or similar on the first or second line of your program.
In your example, the emoji that you used, U-1f44b is not in the range U-1f600 to U-1f650. In my example, I used one that is.
If you want to use \U to include a unicode character, you can't use the raw string prefix (r'').
But if you use the characters themselves (instead of \U escapes), then you can use the raw string prefix.
You need to ensure that both the pattern and the input string are unicode strings. Neither of them may be UTF8-encoded strings.
But you don't need the re.U flag unless your pattern includes \s, \w, or similar.

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