クックブックの最初の章にのってた文字列スライス まず基本 >>> string = "1234567890" >>> string[:] '1234567890' >>> string[:1] '1' >>> string[:5] '12345' >>> string[:-1] '123456789' >>> string[2:5] '345' >>> string[2:-3] '23456'次 >>> string[…

>>> d = {1:"a",2:"b"} >>> print d.get(1) a >>> print d.get(3) None >>> print d.setdefault(2,"c") b >>> print d.setdefault(4,"d") d便利っぽい。