python入门学习练习题详解-XAMPP中文组官网

本文记录了是学习python过程中做过的小练习题。

题1：按要求过滤日志logfile.log文件内容并写入不同分文件：

包含“ ERROR”的日志，并保存到文件“ error.log”中

包含“ WARNING”的日志，并保存到文件“ warning.log”中

不包含“ ERROR”和“ WARNING”的日志，保存到“ info.log”中

首先创建一个logfile.txt

WARNING 11 --- [freshExecutor-0] jdbc.resultset    : 10. ResultSet.wasNull() returned falseDEBUG [HeartbeatHandler.java:82] :  [DUBBO] Receive heartbeat response in thread New I/O client worker #1-1, dubbo version: 2.6.0INFO 11 --- [freshExecutor-0] jdbc.resultset    : 10. ResultSet.getString(8) returned nullWARNING 11 --- [freshExecutor-0] jdbc.resultset    : 10. ResultSet.next() returned falseERROR [HeartbeatHandler.java:82] :   Can not receive heartbeat response in thread New I/O clientDEBUG [HeartBeatTask.java:66] :  [DUBBO] Send heartbeat to remote channel

代码实现

写法一：打开文件的with open分层次写：

# encoding: utf-8# Author    : Crystal# Datetime  : 2020/4/25 16:42# User      : Administrator
with open("logfile.txt","r") as filelog:    with open("error.log", encoding="utf-8", mode="a") as errorlog:        with open("warning.log", encoding="utf-8", mode="a") as warninglog:            with open("info.log", encoding="utf-8", mode="a") as infolog:                for line in filelog.readlines():                    if "ERROR" in line:                        errorlog.write(line)                    elif "WARNING" in line:                        warninglog.write(line)                    else:                        infolog.write(line)

写法二：还可以把所有with open写在一排：

# encoding: utf-8# Author    : Crystal# Datetime  : 2020/4/25 16:42# User      : Administrator
with open("logfile.txt","r") as filelog, open("error2.log", encoding="utf-8", mode="a") as errorlog, open("warning2.log", encoding="utf-8", mode="a") as warninglog, open("info2.log", encoding="utf-8", mode="a") as infolog:    for line in filelog.readlines():        if "ERROR" in line:            errorlog.write(line)        elif "WARNING" in line:            warninglog.write(line)        else:            infolog.write(line)

题2：请按照注释添加代码def is_to_show（aNumber）：

    // 如果aNumber 是一个偶数，且大于10 ，则返回True 
    return False 
如果“ __main__” == __name__：
    数字= [1,2,3,8,10,12,22,105,110,80,3,70]

// 遍历数字内的所有数字

// 将数字中达成is_to_show 的条件的数字按照从小到大的顺序输出

写法一：先将数字分散再遍历数字，这样写的弊端就是不满足要求的数字也会加入排序，浪费资源：

# encoding: utf-8# Author    : Crystal# Datetime  : 2020/4/25 17:02# User      : Administratordef is_to_show(aNumber):if aNumber % 2 ==0 and aNumber > 10:        return True    return Falseif "__main__" == __name__:    numbers = [1,2,3,8,10,12,22,105,110,80,3,70]    numbers = sorted(numbers)    for aNumber in numbers:        if is_to_show(aNumber) == True:            print(aNumber)

写法二：将满足条件的数字输入到新的数组，然后将新的片断从小到大分开顺序后输出：

# encoding: utf-8# Author    : Crystal# Datetime  : 2020/4/25 17:22# User      : Administratordef is_to_show(aNumber):if aNumber % 2 ==0 and aNumber > 10:        return True    return Falseif "__main__" == __name__:    numbers = [1,2,3,8,10,12,22,105,110,80,3,70]    numbers_new = []    for aNumber in numbers:        if is_to_show(aNumber) == True:            numbers_new.append(aNumber)    numbers_new = sorted(numbers_new)    print(numbers_new)

未完待续......