#[]Writeaprogramto:

#1)asktheuserforanumberbetween1000and9999

#2)testifthenumbermatchesthefirstlineofanyfilein`files_directory`

#3)ifamatchwasfound,printthefilename;otherwise,printnomatchisfound

#4)yourcodeshouldhandleexceptionappropriately(i.e.ablankfileorafilecontainingastringinthefirstline)

#5)youshoulduse`with`statementforopening/closingfiles

#6)makesurethetoruntheenvironmentsetupcodebeforerunningyourownprogram.

#testcases:

#3932,shouldprintout:Matchfoundin74.txt:3932

#2177,shouldprintout:Matchfoundin27.txt:2177

#4932,shouldprintout:Nomatchingfilesfound