Convert a strnig to float

get_float.py

def do_float(x):
    """convert a string into a float - float is in the front of the string
    """
    if isinstance(x, int):
        return float(x)
    elif isinstance(x, float):
        return x
    else:
        x = str(x)
    try:
        w = x.split()
        for x in w:
            try:
                f = float(x)
                return f
            except:
                continue
        return 0.0
    except:
        # logging.info("do_float %s" % x)
        return 0.0


def do_float_with_comma(x):
    """convert a string into a float - convert comma into dot first
    """
    if isinstance(x, int):
        return float(x)
    else:
        x = str(x)
    try:
        if "." in x and "," in x:
            if x.index(".") < x.index(","):
                # comma is more left than dot in string
                x = x.replace(".", "", 1)
            elif x.index(",") < x.index("."):
                x = x.replace(",", "", 1)
        x = x.replace(",", ".")
        return do_float(x)
    except:
        # logging.info("do_float %s" % x)
        return 0.0