pip install camelsplit

from camelsplit import camelsplit

# 'CamelCase' -> ['Camel', 'Case']
camelsplit('CamelCase')

# 'HTTPRequest' -> ['HTTP', 'Request']
camelsplit('HTTPRequest')

# 'IEEE 802.11ac' -> ['IEEE', ' 802.11', 'ac']
camelsplit('IEEE 802.11ac')