Tuples & Lists
1.tuples的优点
2.dot(.)的用法
everything is python is an object
3.split的用法
以某个元素为分割点,对string进行分割(还包括分割的次数)
https://my.oschina.net/hkmax/blog/146553
4.join的用法
L = ['a', 'b', 'c'] L is a list
''”.join(L) returns"abc"
'_'.join(L) returns"a_b_c"
5.L.sort vs sorted(L)
6.remove,del,pop
7.Python doesn't update the counter
8.map