包的调用

可以看一下day16这里先省略

常用模块

datetime 模块

# 为什么要有datetime模块,datetime模块有什么用
# 时间的加减
#
# import datetime
#
# # 获取当前时间
# now = datetime.datetime.now()
# # print(type(now))
# # now = str(now)
# # print(now.split()[0])
# # print(now.split()[1])
#
# print(now + datetime.timedelta(days=5))  # 默认为天
# print(now - datetime.timedelta(5))  # 默认为天
# print(now + datetime.timedelta(-5))  # 默认为天
#
# # print(now + datetime.timedelta(years=5))  # 无法加年和月
# print(now + datetime.timedelta(hours=5))
# print(now + datetime.timedelta(minutes=65))
# print(now + datetime.timedelta(seconds=65))
#
#
# print(now.replace(year=2012,month=12,day=22,hour=5,minute=13,second=14))

random模块

# import random
# a = random.choice([1,2,'a','h'])
# print(a)
#
# print(random.sample(['a','fg',5,2],3))
# 为什么要有random模块,random模块有什么用
# 随机数

# import random
#
# # 打印(0,1)  # 不会取0和1
# print(random.random())
#
# # 打印[n,m]的整数  # 会去n和m
# print(random.randint(1,3))
#
# # 打印(n,m) 的小数
# print(random.uniform(1,3))
#
# # 打印[n,m)的整数
# print(random.randrange(1,3))

# 牢记(从容器中随机选择一个)(******)
# count = 0
# while True:
#     res = random.choice([10000,2,1,3,4])
#     count += 5000
#     if count == 15000:
#         print(f'恭喜你获得10000元现金大奖')
#         count = 0
#         break
#     else:
#         if res == 10000:
#             print('再来一次')
#         else:
#             print(f'恭喜你获得{res}')
#
#     print(f'{"nick"}获得10000元现金大奖')
#     print(f'{"tank"}获得1元现金大奖')
#     print(f'{"sean"}获得1000元现金大奖')
# # 牢记(从容器中随机选择多个)(******)
# print(random.sample([1,'a',2,'b'],2))
#
# # 牢记(打乱容器)(********)
# lis = [1,2,3,4]
# random.shuffle(lis)
# print(lis)

os模块

# 删除文件
# os.remove(r'D:\上海python全栈9期\Python9期视频\day 17\test.py')

# 重命名文件名
# os.rename(r'D:\上海python全栈9期\Python9期视频\day 17\test.py',r'D:\上海python全栈9期\Python9期视频\day 17\test2.py')

# 打印环境变量
# print(os.environ)

# 牢记(dirname),用在执行文件添加环境变量
# print(os.path.dirname(r'D:\上海python全栈9期\Python9期视频\day 17\03 random模块.py'))
# print(os.path.dirname(__file__))
# # import sys
# # sys.path.append(r'D:\上海python全栈9期\Python9期视频\day 17')
#
# # 判断文件是否存在
# print(os.path.exists(r'D:\上海python全栈9期\Python9期视频\day 17\02 datetime模块1.py'))
#
# # 拼接文件路径,因为不同系统的路径拼接符不一样
# print(os.path.join(r'D:\上海python全栈9期\Python9期视频\day 17','aa.txt'))
#
#
# # (牢记)计算文件大小
# print(os.path.getsize(r'D:\上海python全栈9期\Python9期视频\day 17\01 time模块.py'))
#
# # 打印文件夹下所有文件夹和文件
# print(os.walk(r'D:\上海python全栈9期\Python9期视频\day 17\aaa').__next__())

sys模块

#########sys模块
# 为什么要有sys模块,sys模块有什么用
# 与Python交互

# import sys
#
# # 牢记（当使用Python file.py 参数  ，接收参数
# print(sys.argv)
#
# # 获取解释器的版本
# print(sys.hexversion)
#
# # 牢记（获取当前文件导入模块的路径）
# # print(sys.path)  # 调用sys.stdout
#
# # sys.stdout.write('123\n')  # c写  print
#
# # print(sys.stdin.read(10))  # c写 input
#
# def print(str,end='\n'):
#     str = str+end
#     sys.stdout.write('我是新的print\n')
#     sys.stdout.write(str)
#
# print('23423423')
# print('23423423')
# print('23423423')
#
# def input():
#     print('我是新的input')
#     print(sys.stdin.read(10))
#     return
#
# input()

pickle模块

# # pickle也是序列化和反序列化，json可以跨平台，只支持dict/list/str/int/float/bool/None
# # pickle支持python中任意数据类型，所以不能跨平台(不同平台的函数一定是不同的),pickle模块序列化过程是以二进制形式转换
#
# def func():
#     print('f1')
#
# import pickle
#
# # 了解
# # res = pickle.dumps(func)
# # print(res)
# # pickle.loads(res)()
#
# # pickle由于传输的是二进制，所以应该用b模式
# with open(r'D:\上海python全栈9期\Python9期视频\day 17\m1\test.pkl','wb') as fw:
#     pickle.dump(func,fw)
#
# with open(r'D:\上海python全栈9期\Python9期视频\day 17\m1\test.pkl','rb') as fr:
#     data = pickle.load(fr)
# data()