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#coding:utf-8#字典 列表字典生成式#字符串 字符串转换#文件操作 文件字典转换 用户登录注册 系统shoplist=['apple','mango','banana','carrot']
#print shoplist.count('apple')count=0
for i in shoplist:
if i=='apple':
count+=1
print count
#列表去重a=[1,2,3,4,1,3,5]
print set(a)
#函数去重def quchong():
a=['apple','mango','banana','carrot','apple']
new=[]
for i in a:
if not i in new:
new.append(i)
return new
print quchong()
#将主机192.168.1.1-254存入列表host_list=[]
netip="192.168.1."
for hostip in range(1,254):
ip=netip+str(hostip)
host_list.append(ip)
print host_list
#遍历for index,value in enumerate(shoplist):
print index,value
#列表生成式#格式[x for x in 内容] [x for x in 内容 if 条件]fields=['a','b','c']
data={'a':'abc','b':'bac','c':'cba'}
print [data[x] for x in fields]
a=[]
for i in fields:
a.append(data[i])
print a
b=[]
for k,v in data.items():
b.append(v)
print b
print [v for k,v in data.items()]
print ','.join([data[x] for x in fields])
print ','.join('"%s"' % data[x] for x in fields )
#字典 无序content={'name':'wd','pc':{'age':18,'iphone':'111'},'woniu':[1,2,3]}
print content.keys()
print content.values()
print content.items()
content['test']=111222333
content.pop("test")
content['pc']['age']=20
content['woniu'][0]=444
print content.get("name","dasdasdas")
print content
res=content.get("name","")
if res:
print "ok"
else:
print "fail"
print content.has_key("name")
if "name" in content:
print "key is exist"
else:
print "this is key is no exist"
for k,v in content.items():
print k,v
#字典应用for k,v in content.items():
print k+ ":"
if type(v)==dict:
for x,y in v.items():
print x,y
elif type(v)==list:
for z in v:
print z
else:
print v
strcontent="who are you My name is fujinzhou and you"
#字符串取代噢空格print strcontent.split( " ")
dicts={}
arr=strcontent.split( ' ')
for i in arr:
if i not in dicts:
dicts[i]=1
else:
dicts[i]+=1
print dicts
#因为很多单词出现了一次，一旦k,v反转， 1作为key ，这个key 会被一只覆盖到最后一个#方案：把出现的数字作为key，所有出现次数一样的单词保存为列表reslist={}
for k,v in dicts.items():
reslist.setdefault(v,[])
reslist[v].append(k)
print reslist
count=0
f=open('count.html','a+')
f.write("<html><table style='border:solid 1px'>")
f.write("<th style='border:solid 1px'>次数</th><th style='border:solid 1px'>单词</th>")
while count < 4:
key = max(reslist.keys())
print key
print "出现了%s次的单词：%s" % (key,reslist[key])
for word in reslist[key]:
f.write('<tr><td style="border:solid 1px">%s</td><td style="border:solid 1px">%s</td></tr>' % (key,word))
reslist.pop(key)
count = count +1
f.write("</table></html>")
f.close() |
本文转自 shouhou2581314 51CTO博客，原文链接：xxxhttp://blog.51cto.com/thedream/1829710xxxx，如需转载请自行联系原作者