python 统计个数怎么统计

发布网友发布时间：2022-04-25 07:46

共2个回答

热心网友时间：2022-04-07 13:06

# -*- coding: cp936 -*-
fruitfile=open(r"fruit.txt")
fruitdict={}
for line in fruitfile.readlines():
    fruit=line.split()[1]
    if fruitdict.has_key(fruit):
        fruitdict[fruit]+=1
    else:
        fruitdict[fruit]=1
fruitlist=[]
for key,value in fruitdict.items():
    fruitlist.append((key,value))
fruitlist.sort(lambda a,b:b[1],reverse=True)
if len(fruitlist)>=3:
    print "出现次数前三的水果:"
    print fruitlist[0][0],fruitlist[0][1]
    print fruitlist[1][0],fruitlist[1][1]
    print fruitlist[2][0],fruitlist[2][1]
print "\n\n所有水果出现次数:"
for key,value in fruitlist:
    print key,value

其中fruit.txt为文件名

热心网友时间：2022-04-07 14:24

# -*- coding: cp936 -*-
def f():
    for line in open("data.txt"): #读取文件
        yield line
def f2(f):
    for line in f:
        for i, k in enumerate(line.split()):
            if i == 1:
                yield k #得到水果
f = f()
d = f2(f)
l ={}
for i in d:
    n=l.get(i)
    if n is None:
        l.update({i:1})
    else:
        l.update({i:n+1})

res=""
for i in range(3):
    for j in l:
        k= max(l)
        res+= k +"->" +str(l[k]) +';'
        l.pop(k)
        break

print res #打印结果