Commitcf905f0

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mymax: step 03

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	`1`	`+#!/usr/bin/env python3`
	`2`	`+`
	`3`	`+fromtypingimportTYPE_CHECKING,List,Optional`
	`4`	`+`
	`5`	`+importmymaxasmy`
	`6`	`+`
	`7`	`+defdemo_args_float()->None:`
	`8`	`+a,b=2.5,3.5`
	`9`	`+expected=b`
	`10`	`+result=my.max(a,b)`
	`11`	`+assertresult==expected`
	`12`	`+print((a,b),'->',result)`
	`13`	`+`
	`14`	`+`
	`15`	`+###################################### intentional type errors`
	`16`	`+`
	`17`	`+fromfractionsimportFraction`
	`18`	`+`
	`19`	`+deferror_args_fraction()->None:`
	`20`	`+a,b=Fraction(5,8),Fraction(7,12)`
	`21`	`+expected=a`
	`22`	`+result=my.max(a,b)`
	`23`	`+assertresult==expected`
	`24`	`+print((a,b),'->',result)`
	`25`	`+print(result.numerator,result.denominator,sep='/')`
	`26`	`+ifTYPE_CHECKING:`
	`27`	`+reveal_type(a)`
	`28`	`+reveal_type(b)`
	`29`	`+reveal_type(result)`
	`30`	`+`
	`31`	`+`
	`32`	`+`
	`33`	`+defmain():`
	`34`	`+importsys`
	`35`	`+forname,valinglobals().items():`
	`36`	`+ifname.startswith('demo')orname.startswith('error'):`
	`37`	`+print('_'*20,name)`
	`38`	`+val()`
	`39`	`+`
	`40`	`+if__name__=='__main__':`
	`41`	`+main()`

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