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php – 在mysql中存储10000行的python-dictionary而不是打印

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php – 在mysql中存储10000行的python-dictionary而不是打印

见下文
更新2我做了你的建议我：

更新：查看重要更新：

想要将数据存储到mysql-db

{'url': 'http://dom1', 'name': 'miller', 'name2': 'phil man', 'email-adress': 'waddehadde@hotmail.com'}
{'url': 'http://dom2', 'name': 'jonboy', 'name2': 'Josef dude', 'email-adress': 'waddehadde@hotmail.com'}

我有一个非常简单的数据集,但它非常大：大约10 k记录.
i-connect-to-a-mysql-database-in-python我发现我可能会使用peewee

import peewee
from peewee import *

db = MySQLDatabase('jonhydb', user='john',passwd='megajonhy')

class Book(peewee.Model):
    author = peewee.CharField()
    title = peewee.TextField()

    class Meta:
        database = db

Book.create_table()
book = Book(author="me", title='Peewee is cool')
book.save()
for book in Book.filter(author="me"):
    print book.title

Peewee is cool

我知道有两种方法可以做到这一点,一种是将数字存储在服??务器上的文件中
otehr是在数据库中提供服务,使用MySQL来存储它.我可以使用PHP – 将其存储在mysql-db中.简单吧？但昨天我发现Python更好.我在linux-distri上安装了python

但它似乎过于复杂.

所以这引出了一个问题,有没有办法使用MySQL和python peewee或一些simliar leightweight orm存储这个数据集！？

首先 – 很多人都要感谢快速回答

我正在使用opensuse verision 13.1
mysql数据库已经全部启动并运行.

首先,我必须安装peewee和json
虽然我有一些安装peewee的isseus – 见下文
我后来尝试安装simplejson – 作为json的替代品
那我觉得peewee是installabe. – 见下文：

有安装peewee的问题

martin@linux-70ce:~>
martin@linux-70ce:~> git clone https://github.com/coleifer/peewee.git
Klone nach 'peewee'...
remote: Reusing existing pack: 5673, done.
remote: Counting objects: 13, done.
remote: Compressing objects: 100% (13/13), done.
remote: Total 5686 (delta 2), reused 0 (delta 0)
Empfange Objekte: 100% (5686/5686), 3.54 MiB | 102.00 KiB/s, done.
L?se Unterschiede auf: 100% (3468/3468), done.
Prüfe Konnektivit?t... Fertig
martin@linux-70ce:~> cd peewee
martin@linux-70ce:~/peewee> python setup.py install
running install
error: can't create or remove files in install directory

The following error occurred while trying to add or remove files in the
installation directory:

    [Errno 13] Permission denied: '/usr/lib/python2.7/site-packages/test-easy-install-5717.write-test'

The installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

    /usr/lib/python2.7/site-packages/

Perhaps your account does not have write access to this directory?  If the
installation directory is a system-owned directory, you may need to sign in
as the administrator or "root" account.  If you do not have administrative
access to this machine, you may wish to choose a different installation
directory, preferably one that is listed in your PYTHONPATH environment
variable.

For information on other options, you may wish to consult the
documentation at:
Please make the appropriate changes for your system and try again.
martin@linux-70ce:~/peewee>

如上所述 – 我安装了simplejson然后我再次尝试安装peewee ::现在我想我有更多的运气….

martin@linux-70ce:~/peewee> git clone https://github.com/coleifer/peewee.git
Klone nach 'peewee'...                                                                                                                                                             
remote: Reusing existing pack: 5673, done.
remote: Counting objects: 13, done.
remote: Compressing objects: 100% (13/13), done.
remote: Total 5686 (delta 2), reused 0 (delta 0)
Empfange Objekte: 100% (5686/5686), 3.54 MiB | 309.00 KiB/s, done.                                                                                                                 
fix the conflicts: 100% (3468/3468), done.

PrüfeKonnektivität… Fertig
马丁@ Linux的70ce：?/ peewee&GT

看到完整的代码 – 我正在跑步

import urllib
import urlparse
import re
from peewee import *
import json

db = MySQLDatabase('cpan', user='root',passwd='rimbaud')

class User(Model):
    name = TextField()
    cname = TextField()
    email = TextField()
    url = TextField()

    class Meta:
        database = db # this model uses the cpan database


User.create_table() #ensure table is created


url = "http://search.cpan.org/author/?W"
html = urllib.urlopen(url).read()
for lk, capname, name in re.findall('<a href="(/~.*?/)"><b>(.*?)</b></a><br/><small>(.*?)</small>', html):

    alk = urlparse.urljoin(url, lk)

    data = { 'url':alk, 'name':name, 'cname':capname }

    phtml = urllib.urlopen(alk).read()
    memail = re.search('<a href="mailto:(.*?)">', phtml)
    if memail:
        data['email'] = memail.group(1)


data = json.load() #your json data file here

for entry in data: #assuming your data is an array of JSON objects
    user = User.create(name=entry["name"], cname=entry["cname"],
        email=entry["email"], url=entry["url"])
    user.save()

以及随后的结果：

       martin@linux-70ce:~/perl> python cpan6.py
python: can't open file 'cpan6.py': [Errno 2] No such file or directory
martin@linux-70ce:~/perl> python cpan5.py
Traceback (most recent call last):
  File "cpan5.py", line 7, in <module>
    from peewee import *
ImportError: No module named peewee
martin@linux-70ce:~/perl>

好吧,此刻我有点无能为力 – 很高兴收到你的来信
提前谢谢了！！

更新2我做了你的建议我：

martin@linux-70ce:~/peewee> sudo python setup.py install 

t
linux-70ce:/home/martin/perl # cd ..
linux-70ce:/home/martin # cd peewee/
linux-70ce:/home/martin/peewee #  sudo python setup.py install 
running install
running bdist_egg
running egg_info
creating peewee.egg-info
writing peewee.egg-info/PKG-INFO
writing top-level names to peewee.egg-info/top_level.txt
writing dependency_links to peewee.egg-info/dependency_links.txt
writing manifest file 'peewee.egg-info/SOURCES.txt'
reading manifest file 'peewee.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'peewee.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-i686/egg
running install_lib
running build_py
creating build
creating build/lib
copying peewee.py -> build/lib
copying pwiz.py -> build/lib
creating build/lib/playhouse
copying playhouse/tests_shortcuts.py -> build/lib/playhouse
copying playhouse/read_slave.py -> build/lib/playhouse
copying playhouse/tests_kv.py -> build/lib/playhouse
copying playhouse/tests_pwiz.py -> build/lib/playhouse
copying playhouse/gfk.py -> build/lib/playhouse
copying playhouse/test_utils.py -> build/lib/playhouse
copying playhouse/apsw_ext.py -> build/lib/playhouse
copying playhouse/__init__.py -> build/lib/playhouse
copying playhouse/tests_pool.py -> build/lib/playhouse
copying playhouse/tests_apsw.py -> build/lib/playhouse
copying playhouse/kv.py -> build/lib/playhouse
copying playhouse/postgres_ext.py -> build/lib/playhouse
copying playhouse/signals.py -> build/lib/playhouse
copying playhouse/sqlcipher_ext.py -> build/lib/playhouse
copying playhouse/tests_gfk.py -> build/lib/playhouse
copying playhouse/tests_read_slave.py -> build/lib/playhouse
copying playhouse/pool.py -> build/lib/playhouse
copying playhouse/tests_csv_loader.py -> build/lib/playhouse
copying playhouse/tests_berkeleydb.py -> build/lib/playhouse
copying playhouse/djpeewee.py -> build/lib/playhouse
copying playhouse/tests_test_utils.py -> build/lib/playhouse
copying playhouse/migrate.py -> build/lib/playhouse
copying playhouse/csv_loader.py -> build/lib/playhouse
copying playhouse/tests_postgres.py -> build/lib/playhouse
copying playhouse/tests_migrate.py -> build/lib/playhouse
copying playhouse/tests_djpeewee.py -> build/lib/playhouse
copying playhouse/tests_sqlite_ext.py -> build/lib/playhouse
copying playhouse/berkeleydb.py -> build/lib/playhouse
copying playhouse/proxy.py -> build/lib/playhouse
copying playhouse/tests_signals.py -> build/lib/playhouse
copying playhouse/sqlite_ext.py -> build/lib/playhouse
copying playhouse/tests_sqlcipher_ext.py -> build/lib/playhouse
copying playhouse/shortcuts.py -> build/lib/playhouse
creating build/bdist.linux-i686
creating build/bdist.linux-i686/egg
copying build/lib/peewee.py -> build/bdist.linux-i686/egg
creating build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_shortcuts.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/read_slave.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_kv.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_pwiz.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/gfk.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/test_utils.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/apsw_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/__init__.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_pool.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_apsw.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/kv.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/postgres_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/signals.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/sqlcipher_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_gfk.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_read_slave.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/pool.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_csv_loader.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_berkeleydb.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/djpeewee.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_test_utils.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/migrate.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/csv_loader.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_postgres.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_migrate.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_djpeewee.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_sqlite_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/berkeleydb.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/proxy.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_signals.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/sqlite_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/tests_sqlcipher_ext.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/playhouse/shortcuts.py -> build/bdist.linux-i686/egg/playhouse
copying build/lib/pwiz.py -> build/bdist.linux-i686/egg
byte-compiling build/bdist.linux-i686/egg/peewee.py to peewee.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_shortcuts.py to tests_shortcuts.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/read_slave.py to read_slave.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_kv.py to tests_kv.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_pwiz.py to tests_pwiz.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/gfk.py to gfk.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/test_utils.py to test_utils.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/apsw_ext.py to apsw_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/__init__.py to __init__.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_pool.py to tests_pool.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_apsw.py to tests_apsw.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/kv.py to kv.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/postgres_ext.py to postgres_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/signals.py to signals.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/sqlcipher_ext.py to sqlcipher_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_gfk.py to tests_gfk.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_read_slave.py to tests_read_slave.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/pool.py to pool.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_csv_loader.py to tests_csv_loader.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_berkeleydb.py to tests_berkeleydb.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/djpeewee.py to djpeewee.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_test_utils.py to tests_test_utils.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/migrate.py to migrate.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/csv_loader.py to csv_loader.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_postgres.py to tests_postgres.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_migrate.py to tests_migrate.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_djpeewee.py to tests_djpeewee.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_sqlite_ext.py to tests_sqlite_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/berkeleydb.py to berkeleydb.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/proxy.py to proxy.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_signals.py to tests_signals.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/sqlite_ext.py to sqlite_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/tests_sqlcipher_ext.py to tests_sqlcipher_ext.pyc
byte-compiling build/bdist.linux-i686/egg/playhouse/shortcuts.py to shortcuts.pyc
byte-compiling build/bdist.linux-i686/egg/pwiz.py to pwiz.pyc
creating build/bdist.linux-i686/egg/EGG-INFO
installing scripts to build/bdist.linux-i686/egg/EGG-INFO/scripts
running install_scripts
running build_scripts
creating build/scripts-2.7
copying and adjusting pwiz.py -> build/scripts-2.7
changing mode of build/scripts-2.7/pwiz.py from 644 to 755
creating build/bdist.linux-i686/egg/EGG-INFO/scripts
copying build/scripts-2.7/pwiz.py -> build/bdist.linux-i686/egg/EGG-INFO/scripts
changing mode of build/bdist.linux-i686/egg/EGG-INFO/scripts/pwiz.py to 755
copying peewee.egg-info/PKG-INFO -> build/bdist.linux-i686/egg/EGG-INFO
copying peewee.egg-info/SOURCES.txt -> build/bdist.linux-i686/egg/EGG-INFO
copying peewee.egg-info/dependency_links.txt -> build/bdist.linux-i686/egg/EGG-INFO
copying peewee.egg-info/top_level.txt -> build/bdist.linux-i686/egg/EGG-INFO
zip_safe flag not set; analyzing archive contents...
creating dist
creating 'dist/peewee-2.2.5-py2.7.egg' and adding 'build/bdist.linux-i686/egg' to it
removing 'build/bdist.linux-i686/egg' (and everything under it)
Processing peewee-2.2.5-py2.7.egg
Copying peewee-2.2.5-py2.7.egg to /usr/lib/python2.7/site-packages
Adding peewee 2.2.5 to easy-install.pth file
Installing pwiz.py script to /usr/bin

Installed /usr/lib/python2.7/site-packages/peewee-2.2.5-py2.7.egg
Processing dependencies for peewee==2.2.5
Finished processing dependencies for peewee==2.2.5
linux-70ce:/home/martin/peewee #

看到最新的更新 – 在正确地测试peewee后我运行了脚本,现在看看发生了什么.

import urllib
import urlparse
import re
import peewee
import json

db = MySQLDatabase('cpan', user='root',passwd='rimbaud')

class User(Model):
    name = TextField()
    cname = TextField()
    email = TextField()
    url = TextField()

    class Meta:
        database = db # this model uses the cpan database


User.create_table() #ensure table is created


url = "http://search.cpan.org/author/?W"
html = urllib.urlopen(url).read()
for lk, capname, name in re.findall('<a href="(/~.*?/)"><b>(.*?)</b></a><br/><small>(.*?)</small>', html):
    alk = urlparse.urljoin(url, lk)

    data = { 'url':alk, 'name':name, 'cname':capname }

    phtml = urllib.urlopen(alk).read()
    memail = re.search('<a href="mailto:(.*?)">', phtml)
    if memail:
        data['email'] = memail.group(1)


data = json.load() #your json data file here

for entry in data: #assuming your data is an array of JSON objects
    user = User.create(name=entry["name"], cname=entry["cname"],
        email=entry["email"], url=entry["url"])
    user.save()

我收回了这个错误.

Traceback (most recent call last):
  File "cpan5.py", line 10, in <module>
    db = MySQLDatabase('cpan', user='root',passwd='rimbaud')
NameError: name 'MySQLDatabase' is not defined
linux-70ce:/home/martin/perl #

最新更新：从7月14日起

假设现在没事了 – 我已经设置了……所以
好吧 – 但它在某一点失败了.

import urllib
import urlparse
import re
# import peewee
import json
from peewee import *



#from peewee import MySQLDatabase ('cpan', user='root',passwd='rimbaud') 


db = MySQLDatabase('cpan', user='root',passwd='rimbaud') 

class User(Model):
    name = TextField()
    cname = TextField()
    email = TextField()
    url = TextField()

    class Meta:
        database = db # this model uses the cpan database


User.create_table() #ensure table is created


url = "http://search.cpan.org/author/?W"
html = urllib.urlopen(url).read()
for lk, capname, name in re.findall('<a href="(/~.*?/)"><b>(.*?)</b></a><br/><small>(.*?)</small>', html):
    alk = urlparse.urljoin(url, lk)

    data = { 'url':alk, 'name':name, 'cname':capname }

    phtml = urllib.urlopen(alk).read()
    memail = re.search('<a href="mailto:(.*?)">', phtml)
    if memail:
        data['email'] = memail.group(1)


data = json.load('email') #your json data file here

for entry in data: #assuming your data is an array of JSON objects
    user = User.create(name=entry["name"], cname=entry["cname"],
        email=entry["email"], url=entry["url"])
    user.save()

猜测必须存在一个数据文件：一个在解析过程中由脚本创建的…这是对的吗？

)
martin@linux-70ce:~/perl> python cpan_100.py
Traceback (most recent call last):
  File "cpan_100.py", line 47, in <module>
    data = json.load('email') #your json data file here
  File "/usr/lib/python2.7/json/__init__.py", line 286, in load
    return loads(fp.read(),
AttributeError: 'str' object has no attribute 'read'
martin@linux-70ce:~/perl>

期待您的来信

解决方法:

假设你想使用python和peewee,我会做类似以下的事情：

from peewee import *
import json

db = MySQLDatabase('jonhydb', user='john',passwd='megajonhy')

class User(Model):
    name = TextField()
    name2 = TextField()
    email_address = TextField()
    url = TextField()

    class Meta:
        database = db # this model uses the jonhydb database

User.create_table() #ensure table is created

data = json.load() #your json data file here

for entry in data: #assuming your data is an array of JSON objects
    user = User.create(name=entry["name"], name2=entry["name2"],
        email_address=entry["email-adress"], url=entry["url"])
    user.save()

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python-遇到dictionary changed size during iteration【代码】

1 c=02 f={}3 jiao={‘脚本一‘:122000,‘脚本二‘:189999,4‘脚本三‘:99999,‘脚本4‘:25000000,‘jiaoben‘:126}5for i in jiao.values():6 c=c+i7 average=c/len(jiao)8for li in jiao.keys():9if jiao[li]>average: 10del jiao[li] 11# f.setdefault(li,jiao[li])12print(average) 13print(li)此时运行出现一下错误:RuntimeError: dictionary changed size during iteration # 字典在迭代的时候改变了字典大小这个问题在网...

python错误之RuntimeError: dictionary changed size during iteration【代码】

pythonn报错信息：C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\python.exe C:/Users/Administrator/PycharmProjects/pythondemo/maptest.pyTraceback (most recent call last): File "C:/Users/Administrator/PycharmProjects/pythondemo/maptest.py", line 5, in <module> for line in maps.keys():RuntimeError: dictionary changed size during iteration# python2中实现遍历的同时删除字典中的元素...

Python学习心得(二) 字典Dictionary【代码】

前言 . 在Python中字典就是一系列的键值对，一种可变容器，可以存储任意对象，也被称作关联数组或哈希表。1.基本语法用一对花括号{}中的一系列键值对表示，键与值之间用冒号分隔，键值对之间用逗号分隔，例如：blogger = {‘name‘: ‘binguo‘,‘age‘: 27} 2.访问字典中的值print ‘name:‘+ blogger[‘name‘] +‘ age:‘ +str(blogger[‘age‘]) 3.添加键值对blogger[‘gender‘] = ‘male‘ print blogger #{‘gender‘: ‘...

7-Python3从入门到实战—基础之数据类型（字典-Dictionary）【代码】

Python从入门到实战系列——目录字典的定义字典是另一种可变容器模型，且可存储任意类型对象；使用键-值（key-value）存储，具有极快的查找速度；字典的每个键值(key=>value)对用冒号(:)分割，每个对之间用逗号(,)分割，整个字典包括在花括号({})中语法格式：{ key1 : value1, key2 : value2, key3 : value3 ...} users={‘ 张三 ‘ : 18 , ‘ 李四 ‘ : 19 , ‘ 王五 ‘ : 20 , ‘ 赵六 ‘ : 19}字典的键必须是唯一的，并且值的数...

Python 字典(Dictionary)【代码】

字典是另一种可变容器模型，且可存储任意类型对象。字典的每个键值 key=>value 对用冒号 : 分割，每个键值对之间用逗号 , 分割，整个字典包括在花括号 {} 中 ,格式如下所示： d = {key1 : value1, key2 : value2 }键一般是唯一的，如果重复最后的一个键值对会替换前面的，值不需要唯一。>>>dict = {a: 1, b: 2, b: 3} >>> dict[b] 3 >>> dict {a: 1, b: 3}值可以取任何数据类型，但键必须是不可变的，如字符串，数字或元组。一个...

将python中的List转化成dictionary【图】

问题1：如何将一个list转化成一个dictionary？问题描述：比如在python中我有一个如下的list，其中奇数位置对应字典的key，偶数位置为相应的value解决方案:1.利用zip函数实现2.利用循环来实现3.利用 enumerate 函数生成index来实现问题2 我们如何将两个list 转化成一个dictionary？问题描述：假设你有两个list解决方案：还是常见的zip函数这里我们看到了zip函数确实在配对上面起到了很不错的效果，如果两个list都很大，你需要引入it...

Python字典(Dictionary)操作详解

Python字典是另一种可变容器模型，且可存储任意类型对象，如字符串、数字、元组等其他容器模型。一、创建字典字典由键和对应值成对组成。字典也被称作关联数组或哈希表。基本语法如下：dict = {Alice: 2341, Beth: 9102, Cecil: 3258}也可如此创建字典：dict1 = { abc: 456 }; dict2 = { abc: 123, 98.6: 37 };注意：每个键与值用冒号隔开（:），每对用逗号，每对用逗号分割，整体放在花括号中（{}）。键必须独一无二，但值则不必。...

Python字典(Dictionary)操作详解_python

这篇文章主要介绍了Python 字典(Dictionary)的详细操作方法,需要的朋友可以参考下Python字典是另一种可变容器模型，且可存储任意类型对象，如字符串、数字、元组等其他容器模型。一、创建字典字典由键和对应值成对组成。字典也被称作关联数组或哈希表。基本语法如下：代码如下:dict = {Alice: 2341, Beth: 9102, Cecil: 3258}也可如此创建字典：代码如下:dict1 = { abc: 456 };dict2 = { abc: 123, 98.6: 37 };注意：每个键与值用...

【python教程】Python字典(Dictionary)

Python 字典(Dictionary)字典是另一种可变容器模型，且可存储任意类型对象，如其他容器模型。字典由键和对应值成对组成。字典也被称作关联数组或哈希表。基本语法如下：dict = {Alice: 2341, Beth: 9102, Cecil: 3258}也可如此创建字典：dict1 = { abc: 456 }; dict2 = { abc: 123, 98.6: 37 };每个键与值用冒号隔开（:），每对用逗号，每对用逗号分割，整体放在花括号中（{}）。键必须独一无二，但值则不必。值可以取任何数据类型...

python中字典(Dictionary)用法实例详解

本文实例讲述了python中字典(Dictionary)用法。分享给大家供大家参考。具体分析如下：字典（Dictionary）是一种映射结构的数据类型，由无序的“键－值对”组成。字典的键必须是不可改变的类型，如：字符串，数字，tuple；值可以为任何python数据类型。 1、新建字典>>> dict1={} #建立一个空字典 >>> type(dict1) <type dict>2、增加字典元素：两种方法>>> dict1[a]=1 #第一种 >>> dict1 {a: 1} #第二种：setdefault方法 >>> dict1...

python中list, tuple, dictionary, set的底层细节

list 从细节上看，Python中的列表是由对其它对象的引用组成的连续数组。指向这个数组的指针及其长度被保存在一个列表头结构中。这意味着，每次添加或删除一个元素时，由引用组成的数组需要该标大小（重新分配）。幸运的是，Python在创建这些数组时采用了指数过分配，所以并不是每次操作都需要改变数组的大小。但是，也因为这个原因添加或取出元素的平摊复杂度较低。 dict CPython使用伪随机探测(pseudo-random probing)的散列表(ha...

[转载] python里字典的用法_python中字典(Dictionary)用法实例详解

参考链接： Python字典dictionary copy方法本文实例讲述了python中字典(Dictionary)用法。分享给大家供大家参考。具体分析如下：字典(Dictionary)是一种映射结构的数据类型，由无序的“键－值对”组成。字典的键必须是不可改变的类型，如：字符串，数字，tuple；值可以为任何python数据类型。 1、新建字典 >>> dict1={} #建立一个空字典 >>> type(dict1) 2、增加字典元素：两种方法 >>> dict1[a]=1 #第一种 >>> dict1 {a...

[转载] python单词词典_Python 字典(Dictionary)

参考链接： Python字典dictionary clear方法 Python 字典(Dictionary) 字典是另一种可变容器模型，且可存储任意类型对象。字典的每个键值(key=>value)对用冒号(:)分割，每个对之间用逗号(,)分割，整个字典包括在花括号({})中 ,格式如下所示：d = {key1 : value1, key2 : value2 } 键必须是唯一的，但值则不必。值可以取任何数据类型，但键必须是不可变的，如字符串，数字或元组。一个简单的字典实例：dict = {Alice: 2341,...

python数据类型（字典dictionary）

字典（dictionary） ? ? ? ?字典的含义和表示都与其语义相似，就像我们小时候查找汉字，可以通过拼音字母（或笔画）进行检索。我们可以自己定义Python中的字典名字，然后通过这个名字查找到对应的数值。其中的名字叫作“键（key）”，对应的数值简称“值（value）”，所以字典也称“键值对”。需要注意的是，字典没有顺序一说，所有的值仅能用键获取。 ? ? ? ? ?简而言之，字典被看作无序的键值对或有名字的元素列表。 ? 一、字典的...

Python学习之：dictionary的注意事项【代码】【图】

Python学习之：dictionary的注意事项初始化dictionary dict_1 = dict(red = 12, blue = 20, green = 14, grey = 10) print(dict_1)output: {‘red’: 12, ‘blue’: 20, ‘green’: 14, ‘grey’: 10} dictionary的for循环 dict_1 = dict(red = 12, blue = 20, green = 14, grey = 10) total = 0 for color in dict_1:print(color)print(type(color))total += dict_1[color]print("the total num is:", total)上面的循环变量color...

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【php – 在mysql中存储10000行的python-dictionary而不是打印】教程文章相关的互联网学习教程文章

python-遇到dictionary changed size during iteration【代码】

python错误之RuntimeError: dictionary changed size during iteration【代码】

Python学习心得(二) 字典Dictionary【代码】

7-Python3从入门到实战—基础之数据类型（字典-Dictionary）【代码】

Python 字典(Dictionary)【代码】

将python中的List转化成dictionary【图】

Python字典(Dictionary)操作详解

Python字典(Dictionary)操作详解_python

【python教程】Python字典(Dictionary)

python中字典(Dictionary)用法实例详解

python中list, tuple, dictionary, set的底层细节

[转载] python里字典的用法_python中字典(Dictionary)用法实例详解

[转载] python单词词典_Python 字典(Dictionary)

python数据类型（字典dictionary）

Python学习之：dictionary的注意事项【代码】【图】

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