day16 函数的用法：内置函数

#内置：python自带
# def func():
#     a = 1
#     b = 2
#     print(locals())
#     print(globals())
# func()

# range(100)  #[0,100)
# range(5,100) #[5,100)
# range(1,100,2)
#可迭代对象，可以for循环，惰性运算
# range(100).__iter__()
# iterator = iter(range(100))  #拿到一个迭代器
# print(iterator.__next__())
# print(next(iterator))
# for i in range(100):
#     print(i)
# def iter():
#     return range(100).__iter__()

# print(dir([]))
# print(dir(5))
# a = 1
# def func():pass
# print(callable(a))      #不可以调用
# print(callable(print))  #可以调用
# print(callable(func))   #可以调用

#ctrl + 左键单击 ：pycharm
#help：包含所有方法名以及他的使用方法 —— 不知道用法
#dir：只包含方法名 —— 想查看某方法是否在这个数据类型中

import time   #时间
import os     #操作系统

# f = open(‘文件名‘,‘w‘,encoding=‘utf-8‘)
#打开模式：r、w、a、rb、wb，ab
#编码 utf-8/GBK

# print(id(1))
# print(id(2))
# print(hash(‘sajghfj;eyrwodnvjnz,.jifupwk‘))  #算法
# print(hash(125342))
# print(hash((1,2,3,4)))

#数据的存储和查找
#模块：hashlib
# {‘k‘:‘v‘}
# [1,2,3,4,5,6,]

# hash([1,2,3,4,5,6,])
#hash 判断一个数据类型是否可以hash
#在一个程序执行的过程中，对同一个值hash的结果总是不变
#多次执行，对同一个值的hash结果可能改变

# s = input(‘提示:‘)
# print(1,2,3,4,5,sep=‘*‘)  #sep是指定多个要打印的内容之间的分隔符
# print(1,2,sep=‘,‘)   #print(‘%s,%s‘%(1,2))
# f = open(‘a‘,‘w‘)
# print(‘abc\n‘)
# print(2)

# import time
# for i in range(0,101,2):  #[0,2,4,6,8...100]
#      time.sleep(0.2)
#      char_num = i//2      #打印多少个‘*‘    8/2 = 4
#      if i == 100:
#           per_str = ‘\r%s%% : %s\n‘ % (i, ‘|‘ * char_num)
#      else:
#           per_str = ‘\r%s%% : %s‘%(i,‘|‘*char_num)
#      print(per_str,end=‘‘, flush=True)
# print(‘你好‘)
# print(‘再见‘)
#ftp == 网盘
# print("\033[31;1mHello world,how are you \033[0m")
# print(‘\033[4;32;41m金老师‘)
# print(‘egon‘)
# print(‘alex \033[0m‘)

# exec("print(‘12345‘)")
# eval("print(‘12345‘)")
# print(exec(‘1+2+3-4‘))
# print(eval(‘1+2+3-4‘))
# a = 1+2+3-4
# print(1+2+3-4)

# code1 = ‘for i in range(0,10): print (i)‘
# compile1 = compile(code1,‘‘,‘exec‘)
# exec(compile1)

#简单求值表达式用eval
# code2 = ‘1 + 2 + 3 + 4‘
# compile2 = compile(code2,‘‘,‘eval‘)
# print(eval(compile2))

# code3 = ‘name = input("please input your name:")‘
# compile3 = compile(code3,‘‘,‘single‘)
# # name #执行前name变量不存在
# exec(compile3)
# print(name)

#exec
#eval
#compile

# print(abs(5))

# ret = divmod(10,2)   #商余
# print(ret)
# ret = divmod(3,2)
# print(ret)
# ret = divmod(7,2)
# print(ret)

# 107
# 10
# divmod(107,10)

# print(round(3.14159,2))

# print(pow(2,3.5))   #幂运算
# print(pow(3,2))
# print(pow(2,3,2))
# print(pow(2,3,3))  #x**y%z

# print(sum([1,2,3,4,5,6],-2))
# print(sum(range(100)))
#sum接收一个可迭代对象

#min
# print(min([1,4,0,9,6]))
# print(min([],default=0))
print(min([-9,1,23,5],key=abs))#匿名函数
# print(min({‘z‘:1,‘a‘:2}))

# t = (-25,1,3,6,8)
# print(max(t))
# print(max(t,key = abs))
# print(max((),default=100))