1月 152021
1月 052021
File -> Settings -> Project -> Python Interpreter -> Install -> Available Packages -> Manage Repositories https://mirrors.163.com/pypi/simple/ https://mirrors.ustc.edu.cn/pypi/web/simple https://pypi.tuna.tsinghua.edu.cn/simple https://mirrors.aliyun.com/pypi/simple/
12月 242020
https://ipinfo.io/developers
C:\Users\harveymei>curl ipinfo.io { "ip": "119.137.55.106", "city": "Shenzhen", "region": "Guangdong", "country": "CN", "loc": "22.5455,114.0683", "org": "AS4134 CHINANET-BACKBONE", "timezone": "Asia/Shanghai", "readme": "https://ipinfo.io/missingauth" } C:\Users\harveymei>
10月 122020
#定义一个创建文件的函数
def create_file():
path = 'C:/Users/harveymei/Desktop/' #最后一个斜线必须有
fullname = path + filename + '.txt'
file = open(fullname, 'w')
file.close()
#使用for循环调用创建文件函数
for name in range(1,11): #使用range()函数提供1-10序列数值
filename = str(name) #使用str()函数将整数转换为字符串赋值给变量
create_file() #循环调用函数,创建10个文件
PS D:\Python> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe d:/Python/hello.py
PS D:\Python> ls C:\Users\harveymei\Desktop\
目录: C:\Users\harveymei\Desktop
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 2020/10/12 11:51 0 1.txt
-a---- 2020/10/12 11:51 0 10.txt
-a---- 2020/10/12 11:51 0 2.txt
-a---- 2020/10/12 11:51 0 3.txt
-a---- 2020/10/12 11:51 0 4.txt
-a---- 2020/10/12 11:51 0 5.txt
-a---- 2020/10/12 11:51 0 6.txt
-a---- 2020/10/12 11:51 0 7.txt
-a---- 2020/10/12 11:51 0 8.txt
-a---- 2020/10/12 11:51 0 9.txt
-a---- 2020/10/9 9:00 2136 Docker Desktop.lnk
-a---- 2020/4/14 8:55 2371 GitHub Desktop.lnk
-a---- 2020/8/28 15:20 2312 Kindle.lnk
-a---- 2020/8/21 17:59 2255 MockingBot.lnk
-a---- 2020/10/10 9:40 2217 Slack.lnk
PS D:\Python>
10月 092020
#定义密码列表并赋值给变量
password_list = ['*#*#', '12345']
#定义函数
def account_login():
password = input('Password:') #用户输入赋值变量
password_correct = password == password_list[-1] #使用列表索引取值进行布尔运算并赋值变量
password_reset = password == password_list[0]
if password_correct: #条件成立打印信息
print('Login success!')
elif password_reset: #反之,password_reset条件成立(即输入*#*#)
new_password = input('Enter a new password:') #用户输入赋值变量
password_list.append(new_password) #列表追加数据
print('Your password has changed successfully!')
account_login() #继续调用函数
else: #反之,打印错误信息
print('Wrong password or invalid input!')
account_login()
#调用函数
account_login()
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe c:/Users/harveymei/hello.py
Password:54321
Wrong password or invalid input!
Password:12345
Login success!
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python39/python.exe c:/Users/harveymei/hello.py
Password:*#*#
Enter a new password:hahaha
Your password has changed successfully!
Password:hahaha
Login success!
PS C:\Users\harveymei>
9月 232020
#自定义函数,a*a+b*b=c*c,开平方求c值
def Pythagorean_theorem(a,b):
return 'The right triangle third side\'s length is {}'.format((a**2 + b**2)**(1/2))
#引号内的字符串出现符号时需要使用\转义
#使用.format()将格式化的运算值填入字符串中
#调用函数,传入参数并打印函数返回
print(Pythagorean_theorem(3,4))
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
The right triangle third side's length is 5.0
PS C:\Users\harveymei>
9月 232020
#6的2次方
print(6**2)
#6的4次方
print(6**4)
#36的2次方
print(36**2)
#开平方
#1296的1/2次方
print((6**4)**(1/2))
#1296的1/4次方
print((6**4)**(1/4))
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
36
1296
1296
36.0
6.0
PS C:\Users\harveymei>
9月 222020
#自定义函数,重量克转化为千克
def g2kg(g):
kg = g / 1000
return str(kg) + 'kg'
#调用函数并赋值变量
result = g2kg(2500)
#打印变量
print(result)
PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
2.5kg
PS C:\Users\harveymei>
7月 282020
CentOS 8
编译报错(提示为nghttp2版本太旧)
[root@test httpd-2.4.43]# ./configure --enable-http2 checking for nghttp2... checking for user-provided nghttp2 base directory... none checking for pkg-config along ... checking for nghttp2 version >= 1.2.1... FAILED configure: WARNING: nghttp2 version is too old
启用仅CentOS 8支持的Power Tools软件源仓库
可供 CentOS 使用的软件库
https://wiki.centos.org/zh/AdditionalResources/Repositories
PowerTools —— 只供 CentOS8 使用,PowerTools 软件库提供了大量开发者用的工具。缺省是停用的。
[root@test httpd-2.4.43]# dnf config-manager --set-enabled PowerTools [root@test httpd-2.4.43]# dnf makecache CentOS-8 - AppStream 9.6 kB/s | 4.3 kB 00:00 CentOS-8 - Base 8.6 kB/s | 3.9 kB 00:00 CentOS-8 - Extras 4.4 kB/s | 1.5 kB 00:00 CentOS-8 - PowerTools 1.7 MB/s | 1.9 MB 00:01 Extra Packages for Enterprise Linux Modular 8 - x86_64 57 kB/s | 18 kB 00:00 Extra Packages for Enterprise Linux 8 - x86_64 58 kB/s | 18 kB 00:00 Metadata cache created. [root@test httpd-2.4.43]#
安装开发库
[root@test httpd-2.4.43]# dnf -y install libnghttp2-devel =============================================================================================== Package Architecture Version Repository Size =============================================================================================== Installing: libnghttp2-devel x86_64 1.33.0-3.el8_2.1 PowerTools 60 k Transaction Summary =============================================================================================== Install 1 Package
重新编译
[root@test httpd-2.4.43]# ./configure --enable-http2 checking whether to enable mod_http2... checking dependencies checking for OpenSSL... (cached) yes setting MOD_LDFLAGS to "-lssl -lcrypto -lpthread -ldl" setting MOD_CFLAGS to "" setting MOD_CPPFLAGS to "-DH2_OPENSSL" checking for nghttp2... checking for user-provided nghttp2 base directory... none checking for pkg-config along ... setting MOD_CFLAGS to "" checking for nghttp2 version >= 1.2.1... OK adding "-lnghttp2" to MOD_LDFLAGS setting LIBS to "-lnghttp2 -lpthread -ldl" checking nghttp2/nghttp2.h usability... yes checking nghttp2/nghttp2.h presence... yes checking for nghttp2/nghttp2.h... yes checking for nghttp2_session_server_new2... yes checking for nghttp2_stream_get_weight... yes checking for nghttp2_session_change_stream_priority... yes adding "-DH2_NG2_CHANGE_PRIO" to MOD_CPPFLAGS checking for nghttp2_session_callbacks_set_on_invalid_header_callback... yes adding "-DH2_NG2_INVALID_HEADER_CB" to MOD_CPPFLAGS checking for nghttp2_session_get_stream_local_window_size... yes adding "-DH2_NG2_LOCAL_WIN_SIZE" to MOD_CPPFLAGS yes setting MOD_HTTP2_LDADD to "-export-symbols-regex http2_module"
7月 012020
查看系统时间日期配置
[centos@dev ~]$ sudo timedatectl
[sudo] password for centos:
Local time: Wed 2020-07-01 09:21:55 UTC
Universal time: Wed 2020-07-01 09:21:55 UTC
RTC time: Wed 2020-07-01 09:21:55
Time zone: UTC (UTC, +0000)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
[centos@dev ~]$
[centos@dev ~]$ sudo timedatectl --help
timedatectl [OPTIONS...] COMMAND ...
Query or change system time and date settings.
-h --help Show this help message
--version Show package version
--no-pager Do not pipe output into a pager
--no-ask-password Do not prompt for password
-H --host=[USER@]HOST Operate on remote host
-M --machine=CONTAINER Operate on local container
--adjust-system-clock Adjust system clock when changing local RTC mode
--monitor Monitor status of systemd-timesyncd
-p --property=NAME Show only properties by this name
-a --all Show all properties, including empty ones
--value When showing properties, only print the value
Commands:
status Show current time settings
show Show properties of systemd-timedated
set-time TIME Set system time
set-timezone ZONE Set system time zone
list-timezones Show known time zones
set-local-rtc BOOL Control whether RTC is in local time
set-ntp BOOL Enable or disable network time synchronization
systemd-timesyncd Commands:
timesync-status Show status of systemd-timesyncd
show-timesync Show properties of systemd-timesyncd
[centos@dev ~]$
修改系统时区
[centos@dev ~]$ sudo timedatectl set-timezone Asia/Hong_Kong
[centos@dev ~]$ date
Wed Jul 1 17:22:59 HKT 2020
[centos@dev ~]$
[centos@dev ~]$ sudo timedatectl
Local time: Wed 2020-07-01 17:24:20 HKT
Universal time: Wed 2020-07-01 09:24:20 UTC
RTC time: Wed 2020-07-01 09:24:20
Time zone: Asia/Hong_Kong (HKT, +0800)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
[centos@dev ~]$