python教學影片：
https://www.youtube.com/watch?v=1PC3etgLwVc&feature=youtu.be&list=PLXO45tsB95cIRP5gCi8AlYwQ1uFO2aQBw
寫入檔案
my_file = open('my_file.txt','w') write 覆蓋寫入檔案
my_file = open('my_file.txt','a') append 加入在後面
my_file.write(text)
my_file.close()
讀取檔案
file = open('my file.txt','r') read
content = file.read() 讀取檔案到content
content = file.readline() 讀取單行內容到content
content = file.readlines() 讀取內容並轉換為陣列到content
Class
class Human:
name = 'Goods MAN'
price = 18
def __init__(self,name,price,hight,width,weight):
self.name = name
self.price = price
self.h = hight
self.wi = width
self.we = weight
def add(self,x,y):
print(self.name)
result = x+y
print(result)
def minus(self,x,y):
result = x-y
print(result)
def times(self,x,y):
result = x*y
print(result)
def divide(self,x,y):
result = x/y
print(result)
Input
a_input = input('plz enter a num:') #return a sting
print('This input num is :',a_input)
if a_input == '1':
print('This is a good one')
elif a_input == '2':
print('This is Two')
else:
print('good luck')
tuple 跟 list
a_tuple = 5,4,1,25,11
a_list = [11,254,1548,1230]
for index in range(len(a_list)):
print('index=',index,' number in list=',a_list[index])
List 基礎運用
a = [5,1,3,6,4,8,7]
a.append(11)
a.insert(2,150)
a.remove(8)
a.sort(reverse = True)
print(a)
多維list
a = [1,2,3,4,5]
muti = [[1,2,3],
[4,5,6],
[7,8,9]
]
print(muti[0][2])
字典
d = {'apple':[1,2,3],'pear':{'k1':'apple','k2':10},'orange':2}
print(d)
載入模組
#import time
#import time as t
#from time import time,localtime
from time import *
print(localtime())
print(time())
#Break #continue
a =True
while a:
b = input('type ans: ')
if b == '1':
continue
else:
pass
print('still in loot')
Try Error處理
try:
file = open('NONONO.txt','r+')
except Exception as e:
print(e)
response = input('do you want to create a new file')
if response == 'y':
file = open('NONONO.txt','w')
else:
pass
else:
file.write('GOGOGO')
file.close()
zip lambda map
a = [1,2,3]
b = [4,5,6]
list(zip(a,b))
for i,j in zip(a,b):
print(i/2,j*2)
def fun1(x,y):
return(x+y)
fun2 = lambda x,y:x+y
print(fun1(5,6))
print(fun2(7,8))
r = list(map(fun1,[1],[2]))
r2 = list(map(fun1,[1,3],[2,5]))
print(r)
print(r2)
Copy DeepCopy
import copy
a = [1,2,3]
b = a #完全共用ID位置與值
print('a ID:',id(a))
print('b ID:',id(b))
a[0] = 21
print(b)
copy.copy #除第一層以外，其餘數值共用ID位置
c = copy.copy(a)
print("c ID = a ID ? :",id(a) == id(c))
a = [1,2,[3,4]]
d = copy.copy(a)
print("d ID = a ID ? :",id(a) == id(d))
print("d[2] ID = a[2] ID ? :",id(a[2]) == id(d[2]))
e = copy.deepcopy(a) #完全不共用，產生出的新變量，ID是完全獨立的
print("e[2] ID = a[2] ID ? :",id(a[2]) == id(e[2]))
pickle 存放資料
import pickle
a_dict = {'da':111,2:[23,1,4],'23':{1:2,'d':'sad'}}
#file = open('pickle_example.pickle','wb')
#pickle.dump(a_dict,file)
#file.close()
with open('pickle_example.pickle','rb') as file:
a_dict1 = pickle.load(file)
#讀取先前的結果
print(a_dict1)
Set
char_list = ['a','b','c','c','d','d','d']
print(set(char_list))
print(type(set(char_list)))
print(type({1:50}))
sentence = "Hello world"
print(set(sentence))
unique_char = set(char_list)
unique_char.add('x')
#unique_char.clear()
#unique_char.remove('x')
#unique_char.discard('y')
print(unique_char)
set1 = unique_char
set2 = {'a','e','i'}
print(set1.difference(set2)) #set1與set2差集
print(set1.intersection(set2)) #set1與set2聯集
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