LEFT SQUARE BRACKET WITH UNDERBAR
U+298B
⦋
Block
Miscellaneous Mathematical Symbols-B
Category
Open Punctuation
UTF-8
0xE2 0xA6 0x8B
UTF-16
0xFF 0xFE 0x8B 0x29
UTF-32
0xFF 0xFE 0x0 0x0 0x8B 0x29 0x0 0x0
HTML
⦋
Python
u"\u298B"