Read a python class and extract the attributes from the constructor

PythonClassAssignSetter.sh

#!/bin/sh -ex
# Read an python class file and extraact the attributes
# from the constructor. Then assign them and creates setters

PYTHON_CLASS_FILE=${1}

get_constructor_definition=$(sed -n '/__init__(self,/,/):/p' ${PYTHON_CLASS_FILE} | tr -s ' ')

get_mandatory_attributes=$(echo ${get_constructor_definition} | sed 's/def\|__init__\|self//g' | sed 's/, /\n/g' | tr -d ' (,):' | grep -v '=None')
get_optional_attributes=$(echo ${get_constructor_definition} | sed 's/def\|__init__\|self//g' | sed 's/, /\n/g' | tr -d ' (,):' | grep '=None' | cut -d '=' -f 1)


for attr in ${get_mandatory_attributes}
do
    echo self.${attr} = ${attr}
done
echo ""

echo "#Optional"
for attr in ${get_optional_attributes}
do
    echo self.${attr} = ${attr}
done
echo ""

for attr in ${get_mandatory_attributes}
do
    echo "@property"
    echo "def ${attr}(self):"
    echo "    return self._${attr}"
    echo ""
    echo "@${attr}.setter"
    echo "def ${attr}(self, ${attr%"${attr#?}"}):"
    echo "    if type(${attr%"${attr#?}"}) is not str:"
    echo "        raise Exception(\"${attr} should be string. Currently it's %s\" % type(${attr%"${attr#?}"}))"
    echo "    self._${attr} = ${attr%"${attr#?}"}"
    echo "\n"
done

for attr in ${get_optional_attributes}
do
    echo "@property"
    echo "def ${attr}(self):"
    echo "    return self._${attr}"
    echo ""
    echo "@${attr}.setter"
    echo "def ${attr}(self, ${attr%"${attr#?}"}):"
    echo "    if ${attr%"${attr#?}"} is not None:"
    echo "        if type(${attr%"${attr#?}"}) is not str:"
    echo "            raise Exception(\"${attr} should be string. Currently it's %s\" % type(${attr%"${attr#?}"}))"
    echo "    self._${attr} = ${attr%"${attr#?}"}"
    echo "\n"
done

# For optional dictionaries
for attr in ${get_optional_attributes}
do
    echo "if self.${attr} is not None:"
    echo "    @DICTION@['${attr}'] = self.${attr}"
    echo ""
done