#定義學(xué)生列表,可存放多個(gè)學(xué)生
students=['a','b','c','d']
print(students[1])
student_info=['e',18,'mele',['喝酒','泡吧']]
print(student_info[3])
print(student_info[3][1])

#2 切片(顧頭不顧尾,步長(zhǎng))
print(student_info[0:4:2])
#3 長(zhǎng)度
print(len(student_info))
#4 成員運(yùn)算
print('e' in student_info)
print('e' not in student_info)
#5 追加
student_info=['e',18,'mele',['喝酒','泡吧']]
student_info.append('合肥學(xué)院')
#6 刪除
del student_info[2]
print(student_info)
#7 index獲取某個(gè)值的索引
student_info_1=['h',17,'femele','尬舞','喊麥','17']
print(student_info_1.index(17))
#8 獲取某個(gè)值的數(shù)量
print(student_info_1.count(17))
#9 pop取值 默認(rèn)取列表中最后一個(gè)值 有索引就取索引的值
student_info_1.pop()
print(student_info_1)
#
sex=student_info_1.pop(2)
print(sex)
print(student_info_1)

#10 remove
student_info_1=['h',17,'femele','尬舞','喊麥','17']
student_info_1.remove(17)#從左到右刪除第一個(gè)遇到的值
print(student_info_1)
name=student_info_1.remove('h')
print(name)
print(student_info_1)
#11 insert 插入
student_info_1.insert(3,'合肥學(xué)院')
print(student_info_1)
#12 extend 合并列表
student_info_a=['h',17,'femele','尬舞1','喊麥2','17']
student_info_b=['g',17,'femele','尬舞1','喊麥2','17']
student_info_a.extend(student_info_b)
print(student_info_a)
#13 循環(huán)
for student in student_info_1:
    print(student)

#tuple元組
tuple1=(1,2,3,'四','five')
print(tuple1)
#1 按索引取值
print(tuple1[2])#取第三個(gè)值
#2 切片(顧頭不顧尾,步長(zhǎng))
print(tuple1[0:5:2])
#3 長(zhǎng)度
print(len(tuple1))
#4 成員運(yùn)算
print(1 in tuple1)
print(1 not in tuple1)
#5 循環(huán)
for line in tuple1:
    print(line)
    print(line,end='')

''''
#不可變類型
數(shù)字類型
int
float
字符串類型
str
元組
tuple
#可變類型
列表list
字典dict
集合可變和不可變都有'''
number=100
print(id(number))
number=111
print(id(number))
print()

sal=100.1
print(id(sal))
sal=111.1
print(id(sal))
print()

str1='hello python'
print(id(str1))
str2=str1.replace('hello','like')
print(id(str2))
#可變類型

#list1與list2指向同一個(gè)內(nèi)存地址
list1=[1,2,3]
list2=list1
list1.append(4)
print(id(list1))
print(id(list2))

#字典dict
dict1=({'age':18,'name':'peke'})
print(dict1)
print(type(dict1))
#取值 字典名+[] 括號(hào)內(nèi)是對(duì)應(yīng)的值
print(dict1['age'])
#2 存儲(chǔ)一個(gè)level：9到字典中
dict1['level']=9
print(dict1)

#3 len
print(len(dict1))

#4
print('name'in dict1)#值判斷key
print('peke'not in dict1)

#5 刪除
del dict1['level']
print(dict1)

#6 key value items
print(dict1.keys())
print(dict1.values())
print(dict1.items())

#7 循環(huán)
for key in dict1:
    print(key)
    print(dict1[key])

#8 get
print(dict1.get('age'))
''''''
#print(dict1['sex'])#KeyError: 'sex' cant find
dict1=({'age':18,'name':'peke'})
print(dict1.get('sex'))

dict2=(dict1.get('sex','mele'))
print(dict2)

#參數(shù)1 文件的絕對(duì)路徑
#參數(shù)2 操作文件的模式
f=open('file.txt',mode='wt',encoding='utf-8')
f.write('tank')
f.close()#關(guān)閉操作系統(tǒng)文件資源

#2 讀文本文件
f=open('file.txt','r',encoding='utf-8')
print(f.read())
f.close()

#3 追加
f=open('file.txt','a',encoding='utf-8')
f.write('\n 合肥學(xué)院')
f.close()

# 上下文處理
#with 可以管理open打開的文件 會(huì)在with執(zhí)行完后自動(dòng)調(diào)用close() 關(guān)閉文件
# with open() as f 句柄
with open('file.txt',mode='wt',encoding='utf-8') as f1:
   f.write('墨菲定律')

with open('file.txt',mode='r',encoding='utf-8') as f2:
   print(f.read())

with open('file.txt',mode='a',encoding='utf-8') as f3:
   f.write('圍城')
   #f.close()

#with 管理圖片
with open('cxk.jpg','rb') as f4:
   res=f.read()
   print(res)
jpg=res

with open('cxk.jpg','wb') as f5:
   f.write(jpg)


#with管理多個(gè)文件
with open('cxk.jpg','rb') as f4,open('cxk.jpg','wb') as f5:
   res=f4.read()

   f5.write(res)

#1
def login():

     user=input('請(qǐng)輸入用戶名').strip()
     pwd=input('請(qǐng)輸入密碼').strip()
     if user=="cheng" and pwd=="123":
         print("login successful")
     else:
        print("login error")
print(login)
login()#調(diào)用


#2
def login(username,password):
    if username== "cheng" and password == "123":
        print("login successful")
    else:
        print("login error")
login('cheng','123')

#3

'''
ATM
1:提現(xiàn)
2:...
...
....
..
..

'''
def register():
    pass

#在定義階段x,y為形參

#在調(diào)用階段x,y為實(shí)參

#關(guān)鍵數(shù)參數(shù)
def func(x,y):
    print(x,y)
func(x=100,y=10)
#傳參數(shù)的時(shí)候不能多傳也不能少傳


#默認(rèn)參數(shù)
'''
在定義階段,為參數(shù)設(shè)置默認(rèn)值


'''
def foo(x=10,y=10):
    print(x,y)

foo()
foo(11,22)


'''
    函數(shù)的嵌套定義
    函數(shù)的對(duì)象
    函數(shù)的名稱空間
    
    在python中頂格寫的全部稱為全局名稱空間
    在函數(shù)內(nèi)部定義的為局部名稱空間
    python解釋器自帶的都稱為內(nèi)置名稱空間
    加載順序
    內(nèi)置—>全局—>局部
    查找順序
    局部->全局—>內(nèi)置
    
'''
# 1 在函數(shù)內(nèi)部定義函數(shù)
def func1():
    print('from func1')
    def func2():
        print('form func2')
# 2 函數(shù)對(duì)象
def f1():
    pass
def f2():
    pass
dic1={'1':f1,'2':f2}

ch =input("請(qǐng)選擇功能")
if ch=='1':
    print(dic1[ch])
    dic1[ch]()
elif ch=='2':
    print(dic1[ch])
    dic1[ch]()

# 3 函數(shù)的名稱空間
x=10
def func1():
    print('from func1...')
    x=20
    print(x)
    def func2():
        print('form func2...')