#!/usr/bin/env python

"""
convert between types
"""

import argparse
import sys
from .read import CSVParser

__all__ = ['cast', 'float_or_orig']

def cast(to_type, *values):
    retval = []
    for value in values:
        try:
            retval.append(to_type(value))
        except ValueError:
            retval.append(value)
    return retval

def float_or_orig(*values):
    return cast(float, *values)

def main(args=sys.argv[1:]):
    """CLI"""

    # parse command line
    parser = argparse.ArgumentParser(description="interpolate types from file")
    parser.add_argument('file',
                        type=argparse.FileType('r'),
                        help="CSV file")
    options = parser.parse_args(args)

if __name__ == '__main__':
    main()