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d = {"server":"mpilgrim", "database":"master"}
li = ["a", "b", "mpilgrim", "z", "example"]
Tuple ÊDz»¿É±äµÄ list¡£Ò»µ©´´½¨ÁËÒ»¸ö tuple£¬¾Í²»ÄÜÒÔÈκη½Ê½¸Ä±äËü
 t = ("a", "b", "mpilgrim", "z", "example")
Á¬½Ó list Óë·Ö¸î×Ö·û´®
>>> li = ['server=mpilgrim', 'uid=sa', 'database=master', 'pwd=secret']
>>> s = ";".join(li)
>>> s
'server=mpilgrim;uid=sa;database=master;pwd=secret'
>>> s.split(";")   
['server=mpilgrim', 'uid=sa', 'database=master', 'pwd=secret']
>>> s.split(";", 1)
['server=mpilgrim', 'uid=sa;database=master;pwd=secret']
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4.3.2. str º¯Êý
str ½«Êý¾ÝÇ¿ÖÆת»»Îª×Ö·û´®¡£Ã¿ÖÖÊý¾ÝÀàÐͶ¼¿ÉÒÔÇ¿ÖÆת»»Îª×Ö·û´®¡£
Àý 4.6. str ½éÉÜ
>>> str(1)         
'1'
>>> horsemen = ['war', 'pestilence', 'famine']
>>> horsemen
['war', 'pestilence', 'famine']
>>> horsemen.append('Powerbuilder')
>>> str(horsemen)  
"['war', 'pestilence', 'famine', 'Powerbuilder']"
>>> str(odbchelper)
"<module 'odbchelper' from 'c:\\docbook\\dip\\py\\odbchelper.py'>"
>>> str(None)      
'None'  ¶ÔÓÚ¼òµ¥µÄÊý¾ÝÀàÐͱÈÈçÕûÐÍ£¬Äã¿ÉÒÔÔ¤Áϵ½ str µÄÕý³£¹¤×÷£¬ÒòΪ¼¸ºõÿÖÖÓïÑÔ¶¼ÓÐÒ»¸ö
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