Backend DevelopmentPython Tutorialpython opens the file, reads the file command line by line and executes it
import os
file = open("cc.txt")
for line in file:
os.system(line)file = File.open("ttt.txt")
file.each_line do |line|
%x(scp #{line.chomp} #{line.replace("/","")})
end
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How do you insert elements into a Python list?May 08, 2025 am 12:07 AMToinsertelementsintoaPythonlist,useappend()toaddtotheend,insert()foraspecificposition,andextend()formultipleelements.1)Useappend()foraddingsingleitemstotheend.2)Useinsert()toaddataspecificindex,thoughit'sslowerforlargelists.3)Useextend()toaddmultiple
Are Python lists dynamic arrays or linked lists under the hood?May 07, 2025 am 12:16 AMPythonlistsareimplementedasdynamicarrays,notlinkedlists.1)Theyarestoredincontiguousmemoryblocks,whichmayrequirereallocationwhenappendingitems,impactingperformance.2)Linkedlistswouldofferefficientinsertions/deletionsbutslowerindexedaccess,leadingPytho
How do you remove elements from a Python list?May 07, 2025 am 12:15 AMPythonoffersfourmainmethodstoremoveelementsfromalist:1)remove(value)removesthefirstoccurrenceofavalue,2)pop(index)removesandreturnsanelementataspecifiedindex,3)delstatementremoveselementsbyindexorslice,and4)clear()removesallitemsfromthelist.Eachmetho
What should you check if you get a 'Permission denied' error when trying to run a script?May 07, 2025 am 12:12 AMToresolvea"Permissiondenied"errorwhenrunningascript,followthesesteps:1)Checkandadjustthescript'spermissionsusingchmod xmyscript.shtomakeitexecutable.2)Ensurethescriptislocatedinadirectorywhereyouhavewritepermissions,suchasyourhomedirectory.
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