‘‘‘
日志记录模块
日志的几个级别
debug
info
warning
error
critical
‘‘‘

import logging

# logging.basicConfig(level=logging.DEBUG)

logging.basicConfig(level=logging.DEBUG, format=‘%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s‘,datefmt=‘ %Y/%m/%d %H:%M:%S‘, filename=‘myapp.log‘, filemode=‘w‘)


logger = logging.getLogger(__name__)


def hello():
    print("hello world")

def main():
    logger.info("开始执行main函数")
    print("##"*10)
    hello()
    logger.info("调用hello() 函数")
    try:
        a = 2/0
        f = open("demon1.py", "r")
    except Exception as e:
        logger.error("除数不能为0")
    finally:
        logger.warning("文件没有正常关闭")


main()

‘‘‘
os模块
os.name
如果结果为nt， 则为windows系统，
如果结果为posix， 则为unix系统
os.system(cmd)   纯粹的执行系统命令，但是没有返回结果
result = os.popen(cmd)
result.read()  这样你就可以对reuslt进行控制了
os.
‘‘‘


import os

print(os.name)

if os.name == "nt":
    cmd = "ipconfig"
elif os.name == "posix":
    cmd = "ifconfig"

# os.system(cmd)

print(os.listdir("C:"))   #列出当前目录， ls
# os.chdir("..")   #改变目录， cd
print(os.listdir())
print(os.getcwd())  #pwd
# os.mkdir("test")
# os.remove("myapp.log")
# os.rmdir("test")
# os.rename("demon1.py", "demon111.py")
print(os.linesep)
# windows换行符\n\r  linux换行符\n   mac \r

if not os.path.exists("test"):
    os.mkdir("test")

print(os.path.abspath("./"))
print(os.path.split("E:\LivePython1\第十一课"))

‘‘‘
sys
‘‘‘

import sys
print(sys.argv[1])
print(sys.argv[2])
print(sys.stdout)
sys.stdout.write("allalallala")

f = open("1.log", "w")
sys.stdout = f
print("hello world")

‘‘‘
random
随机模块
random.randint(a, b)
‘‘‘
import random

print(random.randrange(1, 100, 2))
print(random.sample([1, 2, 3, 4, 5, 6, 7], 2))

class NumberCount(object):
    def __init__(self):
        self.number1 = 0
        self.number2 = 0
        self.number3 = 0
        self.number4 = 0
        self.number5 = 0
        self.number6 = 0
    def count(self):
        for i in range(1, 6001):
            number = random.randint(1, 6)
            if number == 1:
                self.number1 += 1
            if number == 2:
                self.number2 += 1
            if number == 3:
                self.number3 += 1
            if number == 4:
                self.number4 += 1
            if number == 5:
                self.number5 += 1
            if number == 6:
                self.number6 += 1
    def getResult(self):
        print("1出现的次数: {0}".format(self.number1))
        print("2出现的次数: {0}".format(self.number2))
        print("3出现的次数: {0}".format(self.number3))
        print("4出现的次数: {0}".format(self.number4))
        print("5出现的次数: {0}".format(self.number5))
        print("6出现的次数: {0}".format(self.number6))

if __name__ == "__main__":
    numberCount = NumberCount()
    numberCount.count()
    numberCount.getResult()

import random
import string

# print(string.ascii_letters)
# print(string.digits)
# print(string.ascii_lowercase)
# print(string.ascii_uppercase)
# print(string.printable)
# print(string.punctuation)
# print(string.hexdigits)
#


print("".join(random.sample(string.ascii_letters + string.digits, 4)))