Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)] on win32 Type "copyright", "credits" or "license()" for more information. >>> words = ['big', 'little', 'extra.'] >>> words[2] 'extra.' >>> words[2][0:-1] 'extra' >>> words[2] = words[2][0:-1] >>> words ['big', 'little', 'extra'] >>>