《Python语言程序设计》课件——第一章（中英文课件）.pptxVIP

Python语言程序设计【将数值转换成字符串】

PythonLanguageProgramming[convertingnumericalvaluesintostrings]

知识点【将数值转换成字符串】（Python2的用法）利用一对反撇（反撇和单引号不一样）【例】Python2用法a=123b=456c=a+bd=a与b作为字符连接：+`a`+`b`print(c)print(d)【例】Python2和3共同用法(str())a=123b=456c=a+bd=a与b作为字符连接：+str(a)+str(b)print(c)print(d)#579#a与b作为字符连接：123456#a与b作为字符连接：123456

[Convertanumericvalueintoastring](UsageofPython2)Useapairofbackticks(backticksaredifferentfromsinglequotes)[Example]UsageofPython2a=123b=456c=a+bD=aandbareconnectedascharacters:+`a`+`b`print(c)print(d)[Example]CommonusageofPython2and3(str())a=123b=456c=a+bD=aandbareconnectedascharacters:+str(a)+str(b)print(c)print(d)#579#Aandbareconnectedascharacters:123456#Aandbareconnectedascharacters:123456KnowledgePoints

Python语言程序设计【字符串的连接与倍增】

PythonLanguageProgramming[Stringconcatenationandmultiplication]

知识点【字符串的连接与倍增】字符串连接方式：直接用“+”来连接两个字符串，str1+str2【例】字符串连接方式1print(‘Deris’+‘Weng’)#DerisWeng两个字符串用“逗号”隔开，但字符串之间会多出一个空格【例】字符串连接方式2print(‘Deris’，‘Weng’)#DerisWeng

[Stringconcatenationandmultiplication]Stringconnectionmethod:Connecttwostringsdirectlywith+,str1+str2[Example]Stringconnectionmode1print(‘Deris’+‘Weng’)#DerisWengThetwostringsareseparatedbycommas,butthereisanextraspacebetweenthestrings.[Example]Stringconnectionmode2print(‘Deris’，‘Weng’)#DerisWengKnowledgePoints

知识点【字符串的连接与倍增】字符串连接方式：两个字符串放在一起，中间有空格或者没有空格【例】字符串连接方式3print(‘Deris’‘Weng’)#DerisWengprint(‘Deris’‘Weng’)#DerisWeng用符号“%”连接一个字符串和一组变量【例】字符串连接方式4print(%s,%s%(Deris,Weng))#Deris,Weng

Stringconnectionmethod:Twostringsareputtogetherwithorwithoutspacesinthemiddle.[Example]StringConnectionMode3print(‘Deris’‘Weng’)#DerisWengprint(‘Deris’‘Weng’)#DerisWengConnectastringandasetofvariableswiththesymbol%[Example]StringConnectionMode4print(%s,%s%