python syntax concatenation

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for i in range(begin, end)
balabala

for i in liebiaoming:
balabala

while tiaojian:
balabala

break

---

turtle module

#导入turtle moduleimport turtle  
#use the Pen in the module of turtle 实例化一个t对象t = turtle.Pen()#向前n个像素点t.forward(n)#向后n个像素点t.backward(n)#←m°t.left(m)
t.right(m)
t.reset()

---

function module package
function:
def hhhh (parameter list):
ksjfdlk

Function return value: return

Built-in function: python’s own function

Module: a collection of functions, import first, then use
module.function( )

Package: Contains multiple modules
from PLI import IMagine

---

Class Object Object-oriented
Class: Function collection, which can instantiate the mold of the object
Instantiation: Object = class() t = turtle.Pen()
Object: entity instantiated by the class,
Object-oriented: optimization class, instance object, call function execution Operation

Definition of class:
class class name (parent class name): <br> pass

The first parameter is self

def __init__ (self, spots): <br> Pass
#Assign 10 to spots
kitty = Cats(10)

The object calls the functions and variables in the class
a.b

When the function is defined in the class, Call functions and variables of itself or the parent class, self.function self.vari.

---

File operation

File writing—–import pickle

##save_file = open(“save.dat”, “wb ”) pickle.dump(game_data,
save.file)
save_file.close()

Open:

File variable = open("File path file name", "wb")

Save:

pickle.dump (variable to be written, file variable)

Close:

File variable.close()

File reading—–import pickle

open_file = open(“save.dat”, “rb”) load_game_data = pickle.load(
load_file)
load_file.close()

Open:

File variable = open("File path file name", "rb")

Save:

Variable to put the content = pickle.load(file variable)

Close:

File variable.close()

---

Ubuntu vim

Value String " " List[] Tuple ( ) Tuple {}

Conditional statement if Loop statement for while

Code vertical alignment table hierarchical relationship
Function def Object t. Class Class Module import Package from
Object-oriented programming
File read and write operations

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