python爬虫学习—

namelist = [] #定义一个空的列表

namelist1 = ["小张","小红","小李"]

print(namelist1[0])

print(namelist1[1])

print(namelist1[2])

testlist = [1,"测试"]  #列表中存储混合类型

print(type(testlist[0]))

print(type(testlist[1]))

'''

'''

# for循环遍历输出列表

namelist1 = ["小张","小红","小李"]

for name in namelist1:

    print(name)

length = len(namelist1) #获取列表长度

#while循环遍历输出列表

i = 0

while i < length:

    print(namelist1[i])

    i += 1

'''

#列表的增删改查

'''

#增 append

namelist = ["小张","小王","小赵"]

print("--------追加前名单列表的数据：----------")

for name in namelist:

    print(name)

nametemp = input("请输入追加的姓名:")

namelist.append(nametemp)           #在末尾追加一个元素

print("--------追加后名单列表的数据：----------")

for name in namelist:

    print(name)

'''

'''

#增 extend

a = [1,2]

b = [3,4]

a.append(b)  #将b列表作为一个元素

print(a)

a.extend(b)  #将b列表扩充到a

print(a)

'''

'''

#增 insert

a = [1,2,3]

a.insert(1,"hhhhh") #下标，元素

print(a) #在指定下标插入元素

'''

'''

#删 del pop remove

movieName = ["指环王","钢铁侠","速度与激情","哈利波特","加勒比海盗","速度与激情"]

print("--------删除前电影列表的数据：----------")

for name in movieName:

    print(name)

#del movieName[2]      #在指定位置删除一个元素

#movieName.pop()        #在列表末尾删除最后一个元素

movieName.remove("速度与激情") #删除指定内容的元素（只删第一个）

print("--------删除后电影列表的数据：----------")

for name in movieName:

    print(name)

'''

#改 =

#查 in not in 查看指定元素是不是在列表中，并不是搜索出来

'''

namelist1 = ["小张","小红","小李"]

findName = input("请输入你要查找的名字：")

if findName in namelist1:

    print("所查询名字在列表中")

else:

    print("未查询到要搜索的名字")

'''

'''

letter = ["a","b","a","c","e","d"]

print(letter.index("a",2,4)) #在某一范围内查找某元素，并指出其下标，不在范围内会报错，左闭右开

letter.index("f",0,4)

print(letter.count("d")) #统计某个元素出现的次数

'''

'''

#排序和反转

a = [0,1,3,2]

print(a)

a.reverse() #将列表所有元素反转   注：列表被改变了！

print(a)

a.sort()

print(a) #升序

a.sort(reverse=True) #降序

print(a)

'''

'''

#schoolName = [[],[],[]] #有三个元素的空列表，每个元素都是一个空列表

schoolName = [["北京大学","清华大学"],["石家庄铁道大学","河北师范大学","河北大学"],["天津大学","南开大学"]]

print(schoolName[0][1])

'''

#将八位老师随机分配到三间办公室，并将各办公室名单打印出来

import random

offices = [[],[],[]]

tName = ["a","b","c","d","e","f","g","h"]

i = 0

while i < 8:

    offices[random.randint(0,2)].append(tName[i])

    i += 1

num = 1

print(offices)

for office in offices:

    print("办公室%d的人数为%d"%(num,len(office)))

    num += 1

    print("教师的姓名为")

    for name in office:

        print("%s"%(name),end="\t")

    print()

    print("-"*20)
巴特西

python爬虫学习——列表

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