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1.math简介>>>importmath>>>dir(math)#这句可查看所有函数名列表['__doc__','__name__','__package__','acos','acosh','asin','asinh','atan','atan2','atanh','ceil','copysig... 阅读全文
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4-1Python objects All Python objects have three attributes:type,ID,and value. All are readonly with a possible expection of the value(which can be c... 阅读全文
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3-4Statements Ues ;3-5Statements Use\(unless part of a comma-separated sequence in which case \ is optional) 阅读全文
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2-5 Loops and Numbers a) i = 0 while i 0: print 'positive' else: print 'zero'2-7 Loops and strings s = raw_input('enter a string:') for ... 阅读全文
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1.1文件对象文件只是连续的字节序列。数据的传输经常会用到字节流,无论字节流是由单个字节还是大块数据组成.1.2文件内建函数open()和file() 内建函数open()的基本语法是： file_object=open(file_name,access_mode='r',buffering=-1)... 阅读全文