The task is to programmatically obtain the name used to invoke the program. (For example determine whether the user ran "python hello.py", or "python hellocaller.py", a program importing the code from "hello.py".)

Sometimes a multiline shebang is necessary in order to provide the script name to a language's internal ARGV.

See also Command-line arguments

Examples from GitHub.

print peek$("program_name")
 
s$ = system$("cd")
n = len(s$)
print left$(s$, n - 2), "\\", peek$("program_name")