> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Command `function` **Command.arg** 
        
          def Command.arg(
          arg: str,
          /
          ) -> typing.Any
`function` **Command.args** 
        
          def Command.args(
          args: list\[str],
          /
          ) -> typing.Any
`function` **Command.current\_dir** 
        
          def Command.current\_dir(
          dir: str,
          /
          ) -> typing.Any
`function` **Command.env** 
        
          def Command.env(
          key: str,
          value: None | str,
          /
          ) -> typing.Any
`function` **Command.spawn** 
        
          def Command.spawn() -> std.process.Child
Executes the command as a child process, returning a handle to it. By default, stdin, stdout and stderr are inherited from the parent. `function` **Command.status** 
        
          def Command.status() -> std.process.ExitStatus
Executes a command as a child process, waiting for it to finish and collecting its status. Unlike `cmd.spawn().wait()` and `cmd.spawn().wait_with_output()`, this function does not close the stdin handle. By default, stdin, stdout and stderr are inherited from the parent. `function` **Command.stderr** 
        
          def Command.stderr(
          io: str,
          /
          ) -> typing.Any
Configuration for the child process's standard error (stderr) handle. Defaults to \[`inherit`] when used with \[`spawn`] or \[`status`], and defaults to \[`piped`] when used with \[`output`]. `function` **Command.stdin** 
        
          def Command.stdin(
          io: str,
          /
          ) -> typing.Any
Configuration for the child process's standard input (stdin) handle. Defaults to \[`inherit`] when used with \[`spawn`] or \[`status`], and defaults to \[`piped`] when used with \[`output`]. `function` **Command.stdout** 
        
          def Command.stdout(
          io: str,
          /
          ) -> typing.Any
Configuration for the child process's standard output (stdout) handle. Defaults to \[`inherit`] when used with \[`spawn`] or \[`status`], and defaults to \[`piped`] when used with \[`output`].