srininara

class A {
  public static void main(String args[]){
    System.out.println("Hello World");
  }
}
// in python it would be print("Hello World")

srininara

py.test --lf # Runs all tests first time since it does not know of failing tests
py.test --lf # Runs only failing tests
py.test --lf -svv # Runs failing tests with a lot more information
py.test --lf -svv # Runs failing tests (hopefully now you finished writing code and the failing tests pass)
py.test --lf # Runs all tests since last run did not have any failing test
# Read more here https://docs.pytest.org/en/latest/cache.html