pyfx-tool 0.1.0

Fx (Function eXecution) in Python, inspired by https://www.npmjs.com/package/fx.

PyFx

The Python version of the non-interactive, JavaScript version of the fx. Short for PYthon Function eXecution or Pyf(x).

python3 -mpip install pyfx

Or install in develop mode:

git clone https://github.com/archeraldrich/pyfx
cd pyfx
python3 setup.py develop

Usage

PyFx treats arguments as Python expressions or functions. PyFx passes the input data to the first expression or function and then passes the result of the first one to the second one and so on.

echo '{"name": "world"}' | pyfx 'lambda x: x["name"]' 'lambda x: f"Hello, {x}!"'

Use self to access the input data. Use . at the start of the expression to access the input data without a lambda x: x part.

echo '{"name": "world"}' | pyfx '.get("name")' 'f"Hello, {self}!"'

Use other Python functions to process the data.

echo '{"name": "world"}' | pyfx 'dict.keys' 'list'

Advanced Usage

PyFx can process a stream of JSON objects. PyFx will apply arguments to each object.

printf '{"name": "hello"}\n{"name": "world"}' | pyfx '.get("name")'

If you want to process a stream of JSON objects as a single list, use the --slurp or -s flag.

printf '{"name": "hello"}\n{"name": "world"}' | pyfx --slurp 'list(map(lambda x: x.get("name"), self))' '", ".join'

If you want to process non-JSON data, use the --raw or -r flag.

ls | pyfx -r '[self, self.find(".md") != -1]'

You can use --raw and --slurp (or -rs) together to get a single array of strings.

ls | pyfx -rs 'list(filter(lambda x: x.find(".md") != -1, self))'

PyFx has a special symbol skip for skipping the printing of the result.

ls | pyfx -r 'self if self.find(".md") != -1 else skip'

PyFx comes with the import statement. Use the --import or -i command once per import statement, without the leading import keyword.

seq 1 100 | pyfx -rs -i 'numpy as np' -i 'from matplotlib import pyplot as plt' 'list(map(int, self))' 'np.array' 'plt.plot' 'lambda _: plt.show()'

License

MIT