execution environment his describes the environment in which python programs are executed the goal is to describe the runtime behavior of the interpreterincluding program startupconfigurationand program termination interpreter options and environment the interpreter has number of options that control its runtime behavior and environment options are given to the interpreter on the command line as followspython [options[- cmd filename [argshere' list of the most common command-line optionstable option interpreter command-line arguments description enables warnings about features that are being removed or changed in python - prevents the creation of pyc or pyo files on import - ignores environment variables - prints list of all available command-line options - enters interactive mode after program execution - module runs library module module as script - optimized mode -oo optimized mode plus removal of documentation strings when creating pyo files - arg specifies the behavior of the division operator in python one of -qold (the default)-qnew-qwarnor -qwarnall - prevents the addition of the user site directory to sys path - prevents inclusion of the site initialization module - reports warnings about inconsistent tab usage -tt inconsistent tab usage results in taberror exception - unbuffered binary stdout and stdin - unicode literals all string literals are handled as unicode (python only- verbose mode traces import statements - prints the version number and exits - skips the first line of the source program - cmd executes cmd as string - lib fl ff