Simple method for transforming CSV to JSON

USAGE
python [PATH TO transform.py] [PATH TO MAPPER FILE]

Example usage:
python ~/transform.py ~/mapper.json

Example CSV file:
Name;wage
Joseph Smith;5.000,00

Example Mapper file:

{
    "options": {
		"data_file": "~/data.csv",
		"output_file": "~/output.json",
		"encoding": "ISO-8859-1",
		"sep": ";",
		"limit": 2,
		"header": true,
		"verbose": true
	}
    "mapper": {
        "Name": 0, //field index definition
        "Wage":{ //Custom field definition
            "source": 1,
            "formatter": "float",
            "decimal": ","  
        }
    }
}  

Example output file:

{  
    Name: "Joseph Smith",
    Wage: 5000.00
}

- Custom fields definition  
    id(bool): specifies if the field identifies unique records  
    source(int): csv position index (0-based)  
    formatter(string): custom field formatting  
        [  
            date: "datetime cast, requires 'format' field",  
            float: "float cast, accepts 'decimal' field",  
            int: "cast to int",  
            mapping: "requires 'mapping' field",  
            static: "requires 'value'"  
        ]  
    format(string): specifies input date format
    decimal(char): specifies the decimal separator
    mapping(dictionary): a dictionary with dictionary with key(input) and value (output)
    value(anything): static value to be used
    padl(int): pad left the input  
    ignoreIfNullEmpty: the field is not added to the output if the value is null or empty
- Defining array field names
    { "ArrayField[].Field": 0 }
    "The arrays items are grouped for records in sequence and with the same id"