a = [11,22,33,44,55,66,77,88,99]
b = []
c = []
for i in a:if i >66:b.append(i)else:c.append(i)
x = {"k1":c,"k2":b}
print(x)

l = [11,22,33,44,55,66,77,88,99,90]
result = {}
for item in l:if item < 66:if "k1" not in result:result['k1'] = [item,]    # {'k1': [11,]}else:result['k1'].append(item)elif item > 66:if "k2" not in result:result['k2'] = [item, ]    # {'k1': [11,]}else:result['k2'].append(item)
print(result)

values = [11,22,33,44,55,66,77,88,99,90]
value_dict = {'k1':[],'k2':[]}
for i in values:if i > 66:value_dict['k1'].append(i)elif i < 66:value_dict['k2'].append(i)
print(value_dict)

count = 0
for i in range(1,9):for V in range(1,9):if i != V:print(i,V)count += 1
print(count)

#如果数据是列表[1,3,5,9]的形式，那么如下

ls = [1,3,5,9]count = 0for i in range(0,len(ls)):    for V in range(0,len(ls)):        if i != V:         count+=1print(count)

for i in l2:if i not in l1:print(i)
for i in l1:if i not in l2:print(i)

for i in range(1,10):string = ""for j in range(1,i+1):string +=str(j) + " * "+str(i) + " = " +str(i*j)+"\t"   #\t为横向制表符（相当于4个空格）print(string)

for i in range(1,10):for j in range(1,i+1):print(str(j) + " * "+str(i) + " = " +str(i*j)+"\t",end="")     ##end表示不换行，如果去掉这个end将会所有的输出分别占一行print("\n",end="")      ##此处也可以用print()替换，因为print自带一个换行。换行+不换行=什么都不输出+自动换行

li = [1,2,3,4]
l = len(li)
for i in range(0,l-1):for v in range(i+1,l):print(li[i],li[v])

li=['alex','eric',123]
li[2] = str(li[2])
v = "_".join(li)
print(v)

li=['alex','eric',123]
l = []
for i in li:i = str(i)l.append(i)
v = "_".join(l)
print(v)

for x in range(1,100//5):for y in range(1,100//3):for z in range(1,100):if x + y + z == 100 and 5*x + 3*y + z/3 == 100:print(x,y,z)

tu = ('alex','eric','rain')
for i in range(len(tu)):print(i)for i,l in enumerate(tu,10):print(i,l)
a = list(enumerate(tu))
b = list(enumerate(tu,10))
print(a)
print(b)

num=[2,7,11,15,8,7]
for i in num:for j in num:if i + j == 9:print(i,j)输出:
2 7
2 7
7 2
7 2

num=[2,7,11,15,8,7]
a = []
for i in num:for j in num:if i + j == 9:a.append((i,j))
print(a)输出：
[(2, 7), (2, 7), (7, 2), (7, 2)]

num=[2,7,11,15,8,7]
a = []
for i in range(len(num)):for j in range(len(num)):if num[i] + num[j] == 9:a.append((i,j))
print(a)

user_list = []
for i in range(1,302):temp = {'name':'alex' + str(i),'email':'alex@live.com' + str(i),'password':'pwd' + str(i)}user_list.append(temp)while True:s = input("请输入页数：")s = int(s)start = (s-1)*10end = s*10result = user_list[start:end]for item in result:print(item,type(item))