Question: 
Write a function to convert the given snake case string to camel case string by using regex.


Model's Code:
import re

def snake_to_camel(snake_str):
    return re.sub(r'(_)(.)', lambda x: x.group(2).upper(), snake_str.title()).replace('_', '')



Sample Correct Code:
import re
def snake_to_camel(word):
  return ''.join(x.capitalize() or '_' for x in word.split('_'))


Asserts:
assert snake_to_camel('android_tv') == 'AndroidTv'
assert snake_to_camel('google_pixel') == 'GooglePixel'
assert snake_to_camel('apple_watch') == 'AppleWatch'


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 411 of 974: 299/411 (72.74939172749392%): success