Candid type - Python type

Candid	Python	Example
bool	bool	True, False
int	int	-1
int8	int [-128, 127]	-128
int16	int [-32768, 32767]	-32768
int32	int [-2147483648, 2147483647]	-2147483648
int64	int [-922337203685477580, 922337203685477579]	-922337203685477580
nat	int >= 0	0
nat8	int [0, 255]	255
nat16	int [0, 65535]	65535
nat32	int [0, 4294967295]	4294967295
nat64	int [0, 18446744073709551615]	18446744073709551615
float32	float0.1
float64	float	3.1415
text	str	"hello world"
opt	list with length <= 1	Null:[], Some:[1]
principal	str, bytes or Principal	"aaaaa-aa"
vec	list	[1,2,3]
record	dict	{"key": "val"}
variant	dict	{"ok": 1}
null	None	None

Encode parameters:

from ic.candid import encode, decode, Types
# params is an array, return value is encoded bytes
params = [{'type': Types.Nat, 'value': 10}]
data = encode(params)

Decode parameters:

# data is bytes, return value is an parameter array
params = decode(data)