Shell¶

usage: shell_example.py [-h] [-v] [-s] [-f FILE] [-r] [--session SESSION]
                        [cmd ...]

If no positional arguments are given then an interactive subshell is started.

positional arguments:
  cmd                A comma- or newline-separated list of commands

options:
  -h, --help         show this help message and exit
  -v, --verbose
  -s, --safe         Safe-mode. Ask for confirmation before executing commands.
  -f, --file FILE    Read and run FILE as a command
  -r, --reload       Reload last session
  --session SESSION  Use SESSION

Default Commands
~~~~~~~~~~~~~~~~~~~~~~~~~~

Run multiple Python commands by separating each command with colons or newlines.
E.g.
    ./shell.py 'print abc; print def'

Variables
~~~~~~~~~~~~~~~~~~~~~~~~~~

Assign constants or evaluate expressiosn:
```
    a = 100
    b <- print $a
    echo $a $b
```

Interopability
~~~~~~~~~~~~~~~~~~~~~~~~~~

Interopability with Bash can be done with pipes:
    `|>` for Python.
    `|`  for Bash
    `>-`  for Bash (write to file)
    `>>`  for Bash (append to file)

1. To stdin and stdout
E.g.
```
    echo abc | ./shell.py print
    ./shell.py 'print abc | echo'
```