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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
