Shalima

What are the new features in Python 3.9

Python 3.9 features: 1. High performance andflexibility – PEG basedparser (replaced currentLL(1) ) has high performanceand stability. 2. New 2 operatorsmerge “|”, and “|=” updateare introduced forDictionary operations 3. new two string functionsadded to string object for easy coding experience.they are ‘removeprefix(string)’and removesuffix(string) as below’prefix-n’. removeprefix(‘prefix-‘)’n-suffix’. removesuffix(‘-suffix’)both code provides ‘n’ as result 4. Type hinting …

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What is single and double slash for xpath

#shortsWhat is Single slash ‘/’in Xpath in selenium: Single slash ‘/’ is usedwhen absolute Xpathis considered for Elementidentification for SeleniumWebDriver What is Double slash ‘//’in Xpath in selenium: Double slash ‘//’ is usedwhen relative Xpathis considered for Elementidentification for SeleniumWebDriver Relative Xpath ‘//’is better Elementidentification strategy

Java access modifiers:default, public, privateand protected

Java access modifiers:default, public, privateand protected. 1. default access modifier:here variables and methodsare accessible with in samepakage and not in other pakages 2. public access modifier:variables and methods are acce-ssible in same & other pakages 3. private access modifier:does not allow accessoutside to class or file 4. protected access modifier:here same pakage accessis allowed and …

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Docker image commands

//Build an image fromDockerfile and tag it docker build -t appimage:1.1 //List all images docker image ls //Delete an image docker image rm appimage:1.1 // to get rootprivilege use’sudo’ before above commands e. g. sudo docker image ls #shorts

Most useful git commands

Most useful git commands are git init, git add ., git commit, git push, git pull, git feth 1. git init// to start local repo 2. git add .//to add local changesto staging area 3. git commit -m “change1″// to collect stagedchanges 4. git push// to push localcommittedchanges toremote branch 5. git fetch// will fetchremote …

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