olivepy 0.0.1

A python inliner tool for shell script

olivepy

This is a tool used to process data directly from the shell using python.

It was developed to wrap some basic functionality such as list and type casting, imports, line by line parsing etc.

The olive python (Liasis olivaceus) is a species of snake in the family Pythonidae.

Usage

A very basic example of olivepy parses an input string as an integer

$ printf '0x123' | olivepy -t int
291

$ printf '0b1010' | olivepy -t int
10

Another simple example shows the input parsed as a list of integers

$ printf '0x123 0x345' | olivepy -t int --list
[291, 837]

You can also set a delimiter for splitting the string into a list

$ printf '0x123:0x345' | olivepy -t int --list -d ':'
[291, 837]

The result of the input parsing is placed in the _ variable. The remaining arguments are used as the body of a lambda function and the result is returned

$ printf '0x123 0x345' | olivepy -t int --list 'hex(sum(_))'
0x468

If you wish to run multiple commands separated by line, lambda can be problematic. In this case you can use a normal named function (The function name __f__ so avoid overriding it).

$ printf '0x123 0x345' | olivepy -t int --list -f 's = sum(_); l = len(_); return s/l'
564.0

You can also import libraries using a comma separated list. Use : to import from and ! to import as.

$ printf '{"cmd": "ls"}' | olivepy --import 'os:system!s,json:loads' 's(loads(_).get("cmd"))'
LICENSE        README.md      __pycache__    pyproject.toml src            tests
0

As you can see in the above example, the lambda function returned a value of 0 and it was printed in the output. If you wish tou have the command executed in the main body use the --main flag.

$ printf '{"cmd": "ls"}' | olivepy --import 'os:system!s,json:loads' -m 's(loads(_).get("cmd"))'
LICENSE        README.md      __pycache__    pyproject.toml src            tests

If you wish to run the commands line by line instead of on the entire input, you can use the --line option.

$ printf '123\n124\n' | olivepy -l -t int '_ + 1'
124
125

You can use the --pre and --post options to set some code to run before and after the main body

$ printf '123\n124\n' | olivepy -l -t int -m --pre 'x=111' --post 'print(x)' 'x += _'
358

$ printf '123 124\n' | olivepy -t int -m -l --list -d ' ' --pre 'b = 123' --post 'print(b + sum(a))' 'a = [x+2 for x in _]'
374