PikaStdData data structure
PikaStdData data structure library provides List (list), Dict (dictionary) data structure.
import
Add in main.py
#main.py
import PikaStdData
class List():
The List class provides the List list function. By creating an object of the List class, a list can be created. Such as:
import PikaStdData
list = PikaStdData.List()
Methods of the List class
# add an arg after the end of list
def append(self, arg: any):
pass
# get an arg by the index
def __getitem__(self, i: int) -> any:
pass
# set an arg by the index
def __setitem__(self, i: int, arg: any):
pass
# get the length of list
def len(self) -> int:
pass
Note that the index of the __setitem__() method cannot exceed the length of the List. If you want to add members of the list, you need to use the append() method.
Use ‘[]’ brackets to index the list
List objects can be indexed using ‘[]’. list[1] = a is equivalent to list.__setitem__(1, a), and a = list[1] is equivalent to a = list.__getitem__(1).
Use for loop to iterate over List
List objects support for loop traversal
example:
import PikaStdData
list = PikaStdData.List()
list.append(1)
list.append('eee')
list.append(23.44)
for item in list:
print(item)
class Dict():
The Dict class provides the Dict dictionary function, and a dictionary can be created by creating an object of the Dict class. Such as:
import PikaStdData
dict = PikaStdData.Dict()
Dict class methods
# get an arg by the key
def __getitem__(self, key: str) -> any:
pass
# set an arg by the key
def __setitem__(self, key: str, arg: any):
pass
# remove an arg by the key
def remove(self, key: str):
pass
Index dictionary using ‘[]’ brackets
Dict objects can be indexed using ‘[]’. dict['x'] = a is equivalent to dict.set('x', a) and a = dict['x'] is equivalent to a = dict.__getitem__('x') .
Using a for loop to iterate over a Dict
Dict objects support for loop traversal
example:
import PikaStdData
dict = PikaStdData.Dict()
dict['a'] = 1
dict['b'] = 'eee'
dict['c'] = 23.44
for item in dict:
print(item)
class ByteArray(List)
[Note]: The version of PikaStdData requires at least v1.5.3
The ByteArray class provides the ByteArray byte array function. By creating an object of the ByteArray class, a byte array can be created.
Such as:
import PikaStdData
bytes = PikaStdData.ByteArray()
The ByteArray class inherits from the List class and can use the methods of the List class.
Example:
>>> bytes = PikaStdData.ByteArray(b'test')
>>> for byte in bytes:
... print(byte)
...
116
101
115
116
>>> bytes.append(0xff)
>>> bytes.append(0x0f)
>>> print(bytes[4])
255
>>> print(bytes[5])
15