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å设ä¸ç§éè¦ï¼è¦åå¨åå¸åçµè¯åºå·ï¼èå·çåºå·æ¯0512ï¼åå±±çæ¯0315ï¼åäº¬çæ¯011ï¼ä¸æµ·çæ¯012ãç¨åé¢å·²ç»å¦ä¹ è¿çç¥è¯ï¼å¯ä»¥è¿ä¹æ¥åï¼
>>> citys = ["suzhou", "tangshan", "beijing", "shanghai"]
>>> city_codes = ["0512", "0315", "011", "012"]
ç¨ä¸ä¸ªå表æ¥åå¨åå¸åç§°ï¼ç¶åç¨å¦å¤ä¸ä¸ªå表ï¼ä¸ä¸å¯¹åºå°ä¿ååºå·ãåå¦è¦è¾åºèå·çåºå·ï¼å¯ä»¥è¿ä¹åï¼
>>> print "{} : {}".format(citys[0], city_codes[0])
suzhou : 0512
>请ç¹å«æ³¨æï¼æå¨city_codesä¸ï¼è¡¨ç¤ºåºå·çå
ç´ æ²¡æç¨æ´æ°åï¼èæ¯ä½¿ç¨äºå符串类åï¼ä½ ç¥é为ä»ä¹åï¼
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>>> suzhou_code = 0512
>>> print suzhou_code
330
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>>> mydict = {}
>>> mydict
{}
ä¸è¦å°çâ空âï¼âè²å³æ¯ç©ºï¼ç©ºå³æ¯è²âï¼å¨ç¼ç¨ä¸ï¼âç©ºâæ¯å¾éè¦ãä¸è¬å¸¦â空âåç人é½å¾æåï¼æ¯å¦åæç©ºï¼å¦ã好åä»åºè¯¥æ¯ç´ãæè
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>>> person = {"name":"qiwsir","site":"qiwsir.github.io","language":"python"}
>>> person
{'name': 'qiwsir', 'language': 'python', 'site': 'qiwsir.github.io'}
`"name":"qiwsir"`ï¼æä¸ä¸ªä¼é
çååï¼é®å¼å¯¹ãåé¢çnameå«åé®ï¼keyï¼ï¼åé¢çqiwsiræ¯åé¢ç鮿坹åºçå¼(value)ãå¨ä¸ä¸ªdictä¸ï¼é®æ¯å¯ä¸çï¼ä¸è½éå¤ãå¼åæ¯å¯¹åºäºé®ï¼å¼å¯ä»¥éå¤ãé®å¼ä¹é´ç¨(:)è±æçåå·ï¼æ¯ä¸å¯¹é®å¼ä¹é´ç¨è±æçéå·(,)éå¼ã
>>> person['name2'] = "qiwsir" #è¿æ¯ä¸ç§ådictä¸å¢å é®å¼å¯¹çæ¹æ³
>>> person
{'name2': 'qiwsir', 'name': 'qiwsir', 'language': 'python', 'site': 'qiwsir.github.io'}
ç¨è¿æ ·çæ¹æ³å¯ä»¥åä¸ä¸ªdictç±»åçæ°æ®ä¸å¢å âé®å¼å¯¹âï¼ä¹å¯ä»¥è¯´æ¯å¢å æ°å¼ãé£ä¹ï¼å¢å äºå¼ä¹åï¼é£ä¸ªåå
¸è¿æ¯åæ¥çåï¼ä¹å°±æ¯ä¹è¦åæ ·æ¢è®¨ä¸ä¸ï¼åå
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ç»é½ä¸è¡ï¼æä»¥å®ä»¬æ¯ä¸å¯åçãï¼
>>> ad = {}
>>> id(ad)
3072770636L
>>> ad["name"] = "qiwsir"
>>> ad
{'name': 'qiwsir'}
>>> id(ad)
3072770636L
å®éªè¡¨æï¼åå
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>>> name = (["first","Google"],["second","Yahoo"])
>>> website = dict(name)
>>> website
{'second': 'Yahoo', 'first': 'Google'}
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>>> ad = dict(name = "qiwsir", age = 42)
>>> ad
{'age': 42, 'name': 'qiwsir'}
**æ¹æ³3:**
è¿ä¸ªæ¹æ³ï¼è·ä¸é¢çä¸åå¨äºä½¿ç¨fromkeys
>>> website = {}.fromkeys(("third","forth"),"facebook")
>>> website
{'forth': 'facebook', 'third': 'facebook'}
éè¦æéçæ¯ï¼è¿ç§æ¹æ³æ¯éæ°å»ºç«ä¸ä¸ªdictã
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>>> dd = {(1,2):1}
>>> dd
{(1, 2): 1}
>>> dd = {[1,2]:1}
Traceback (most recent call last):
File "", line 1, in
TypeError: unhashable type: 'list'
##访é®dictçå¼
dictæ°æ®ç±»åæ¯ä»¥é®å¼å¯¹çå½¢å¼å卿°æ®çï¼æä»¥ï¼åªè¦ç¥éé®ï¼å°±è½å¾å°å¼ãè¿æ¬è´¨ä¸å°±æ¯ä¸ç§æ å°å
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>>> person
{'name2': 'qiwsir', 'name': 'qiwsir', 'language': 'python', 'site': 'qiwsir.github.io'}
>>> person['name']
'qiwsir'
>>> person['language']
'python'
å¦ååé¢æè®²ï¼éè¿âé®âè½å¤å¢å dictä¸çâå¼âï¼éè¿âé®âè½å¤æ¹ådictä¸çâå¼âï¼éè¿âé®âä¹è½å¤è®¿é®dictä¸çâå¼âã
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>>> city_code = {"suzhou":"0512", "tangshan":"0315", "beijing":"011", "shanghai":"012"}
>>> print city_code["suzhou"]
0512
æ¢ç¶dictæ¯é®å¼å¯¹çæ å°ï¼å°±ä¸ç¨èèæè°âæåºâé®é¢äºï¼åªè¦éè¿é®å°±è½æ¾å°å¼ï¼è³äºè¿ä¸ªé®å¼å¯¹ä½ç½®å¨åªéå°±ä¸ç¨èèäºãæ¯å¦ï¼åæå»ºç«çcity_code
>>> city_code
{'suzhou': '0512', 'beijing': '011', 'shanghai': '012', 'tangshan': '0315'}
è½ç¶è¿éæ¾ç¤ºçåååèµå¼çæ¶åé¡ºåºæå«ï¼ä½æ¯ä¸å½±å读åå
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¸ä¸æç´¢å¼åï¼å½ç¶æ²¡æï¼å ä¸ºå®æ²¡æé¡ºåºï¼åªéæ¥çç´¢å¼å¢ï¼æä»¥ï¼å¨åå
¸ä¸å°±ä¸è¦ä»ä¹ç´¢å¼ååçäºã
>dictä¸çè¿ç±»ä»¥é®å¼å¯¹çæ å°æ¹å¼å卿°æ®ï¼æ¯ä¸ç§éå¸¸é«æçæ¹æ³ï¼æ¯å¦è¦è¯»åå¼å¾æ¶åï¼å¦æç¨å表ï¼pythonéè¦ä»å¤´å¼å§è¯»ï¼ç´å°æ¾å°æå®çé£ä¸ªç´¢å¼å¼ã使¯ï¼å¨dict䏿¯éè¿âé®âæ¥å¾å°å¼ãè¦é«æå¾å¤ã
>æ£æ¯è¿ä¸ªç¹ç¹ï¼é®å¼å¯¹è¿æ ·çå½¢å¼å¯ä»¥ç¨æ¥åå¨å¤§è§æ¨¡çæ°æ®ï¼å 为æ£ç´¢å¿«æ·ãè§æ¨¡è¶å¤§è¶ææ¾ãæä»¥ï¼mongdbè¿ç§éå
³ç³»åæ°æ®åºå¨å¤§æ°æ®æ¹é¢æ¯è¾æµè¡äºã
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- len(d)ï¼è¿ååå
¸(d)ä¸çé®å¼å¯¹çæ°é
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¸(d)ä¸çé®(key)çå¼
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>>> city_code
{'suzhou': '0512', 'beijing': '011', 'shanghai': '012', 'tangshan': '0315'}
>>> len(city_code)
4
以city_code为æä½å¯¹è±¡ï¼len(city_code)ç弿¯4ï¼è¡¨ææåç»é®å¼å¯¹ï¼ä¹å¯ä»¥è¯´æ¯å项ã
>>> city_code["nanjing"] = "025"
>>> city_code
{'suzhou': '0512', 'beijing': '011', 'shanghai': '012', 'tangshan': '0315', 'nanjing': '025'}
åå
¶ä¸å¢å ä¸é¡¹
>>> city_code["beijing"] = "010"
>>> city_code
{'suzhou': '0512', 'beijing': '010', 'shanghai': '012', 'tangshan': '0315', 'nanjing': '025'}
çªç¶åç°å京çåºå·åéäºãå¯ä»¥è¿æ ·ä¿®æ¹ãè¿è¿ä¸æ¥è¯´æåå
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>>> city_code["shanghai"]
'012'
>>> del city_code["shanghai"]
éè¿`city_code["shanghai"]`è½å¤æ¥çå°è¯¥é®(key)æå¯¹åºçå¼(value)ï¼ç»æåç°ä¹éäºãå¹²èå é¤ï¼ç¨delï¼å°é£ä¸é¡¹é½å æã
>>> city_code["shanghai"]
Traceback (most recent call last):
File "", line 1, in
KeyError: 'shanghai'
>>> "shanghai" in city_code
False
å ä¸ºé®æ¯"shanghai"çé£ä¸ªé®å¼å¯¹é¡¹å·²ç»å é¤äºï¼éæä¸è½æ¾å°ï¼ç¨`in`æ¥ççï¼è¿åçæ¯`False`ã
>>> city_code
{'suzhou': '0512', 'beijing': '010', 'tangshan': '0315', 'nanjing': '025'}
ççå é¤äºå¦ã没æäºã
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>>> city_code = {"suzhou":"0512", "tangshan":"0315", "hangzhou":"0571"}
>>> " Suzhou is a beautiful city, its area code is %(suzhou)s" % city_code
' Suzhou is a beautiful city, its area code is 0512'
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>>> temp = "%(lang)s
My name is %(name)s.
"
>>> my = {"name":"qiwsir", "lang":"python"}
>>> temp % my
'python
My name is qiwsir.
'
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