Function string_to_val

opcua/common/ua_utils.py:82–131

Convert back a string to a python or python-opcua object Note: no error checking is done here, supplying null strings could raise exceptions (datetime and guid)

(string, vtype)

def string_to_val(string, vtype):
    """
    Convert back a string to a python or python-opcua object
    Note: no error checking is done here, supplying null strings could raise exceptions (datetime and guid)
    """
    string = string.strip()
    if string.startswith("["):
        string = string[1:-1]
        var = []
        for s in string.split(","):
            s = s.strip()
            val = string_to_val(s, vtype)
            var.append(val)
        return var

    if vtype == ua.VariantType.Null:
        val = None
    elif vtype == ua.VariantType.Boolean:
        if string in ("True", "true", "on", "On", "1"):
            val = True
        else:
            val = False
    elif vtype in (ua.VariantType.SByte, ua.VariantType.Int16, ua.VariantType.Int32, ua.VariantType.Int64):
        val = int(string)
    elif vtype in (ua.VariantType.Byte, ua.VariantType.UInt16, ua.VariantType.UInt32, ua.VariantType.UInt64):
        val = int(string)
    elif vtype in (ua.VariantType.Float, ua.VariantType.Double):
        val = float(string)
    elif vtype == ua.VariantType.XmlElement:
        val = ua.XmlElement(string)
    elif vtype == ua.VariantType.String:
        val = string
    elif vtype == ua.VariantType.ByteString:
        val = string.encode()
    elif vtype in (ua.VariantType.NodeId, ua.VariantType.ExpandedNodeId):
        val = ua.NodeId.from_string(string)
    elif vtype == ua.VariantType.QualifiedName:
        val = ua.QualifiedName.from_string(string)
    elif vtype == ua.VariantType.DateTime:
        val = parser.parse(string)
    elif vtype == ua.VariantType.LocalizedText:
        val = ua.LocalizedText(string)
    elif vtype == ua.VariantType.StatusCode:
        val = ua.StatusCode(string)
    elif vtype == ua.VariantType.Guid:
        val = uuid.UUID(string)
    else:
        # FIXME: Some types are probably missing!
        raise NotImplementedError
    return val


def string_to_variant(string, vtype):