尾递归def_recursion_merge_sort2(l1,l2,tmp):iflen(l1)==0orlen(l2)==0:tmp.extend(l1)tmp.e...

N=100print([[xforxinrange(1,100)][i:i+3]foriinrange(0,100,3)])

[表达式for变量in列表]或者[表达式for变量in列表if条件]

defloop_merge_sort(l1,l2):tmp=[]whilelen(l1)>0andlen(l2)>0:ifl1[0]<l2[0]:...

该列表只包含满足以下条件的值，元素为原始列表中偶数切片list_data=[1,2,5,8,10,3,18,6,20]res=[xforxinlist_data[::2]ifx%2==0]print(res)

a=[1,2,3,4,5,6,7,8,9,10]res=[iforiinaifi%2==1]print(res)

遍历在新在列表操作，删除时在原来的列表操作a=[1,2,3,4,5,6,7,8]print(id(a))print(id(a[:]))foriina[:]:ifi>5:pass...

list1=[1,2,3]list2=[3,4,5]set1=set(list1)set2=set(list2)print(set1&set2)print(set1^set2)

print([x*11forxinrange(10)])

<?php/***arr2option*数组转成<option></option>列表.**@paramarray$arr待转换的数组*@paramstr...