在头信息中加入 User-Agent 来解决。在 Safari 浏览器中通过选择菜单[开发]->[显示JavaScript控制台]，然后选择[网络]->[文稿]->[标头]，在内容里的[请求]节可以找到 User-Agent。
import requests
url = "https://movie.douban.com/cinema/later/beijing/"
headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 Safari/605.1.15'}
page = requests.get(url, headers=headers)
print(page.status_code)
200
sudo systemctl restart docker
helm install --generate-name nvdp/nvidia-device-plugin
$ kubectl logs -n kube-system nvidia-device-plugin-1614240442-wfh6c
2021/02/26 07:03:48 Loading NVML
2021/02/26 07:03:48 Failed to initialize NVML: could not load NVML library.
2021/02/26 07:03:48 If this is a GPU node, did you set the docker default runtime to `nvidia`?
2021/02/26 07:03:48 You can check the prerequisites at: https://github.com/NVIDIA/k8s-device-plugin#prerequisites
2021/02/26 07:03:48 You can learn how to set the runtime at: https://github.com/NVIDIA/k8s-device-plugin#quick-start
2021/02/26 07:03:48 If this is not a GPU node, you should set up a toleration or nodeSelector to only deploy this plugin on GPU nodes
from machine import ADC
from machine import Pin
class Light():
"""
基于 PT550 环保型光敏二极管的光照传感器元器件，它的灵敏度更高，测量范围是 0Lux～6000Lux。
Lux（勒克斯）是光照强度的单位，它和另一个概念 Lumens（流明）是不同的。Lumens 是指一个光源（比如电灯、投影仪）发出的光能力的总量，而 Lux 是指空间内一个位置接收到的光照的强度。
因为 ADC 支持的最大位数是 12bit，所以这个数值范围是 0~4095 之间。这里按照线性关系做一个转换。
"""
def __init__(self, pin):
self._light = ADC(Pin(pin))
def value(self):
value = self._light.read()
print("Light ADC value:", value)
return int(value/4095*6000)
import time
import ujson
from umqtt.simple import MQTTClient
from light import Light
"""
QCloud Device Info
"""
DEVICE_NAME = ""
PRODUCT_ID = ""
DEVICE_KEY = ""
"""
MQTT topic
"""
MQTT_DEVICE_CONTROL_TOPIC = "$thing/down/property/"+PRODUCT_ID+"/"+DEVICE_NAME
MQTT_DEVICE_STATUS_TOPIC = "$$thing/up/property/"+PRODUCT_ID+"/"+DEVICE_NAME
MQTT_SERVER = PRODUCT_ID + ".iotcloud.tencentdevices.com"
MQTT_PORT = 1883
MQTT_CLIENT_ID = PRODUCT_ID+DEVICE_NAME
MQTT_USERNAME = ""
MQTT_PASSWORD = ""
class LightSensor():
def __init__(self):
self.light = Light(36)
class TencentMQTT():
light_sensor = LightSensor()
def __init__(self):
self.mqtt_client = None
def connect(self):
self.mqtt_client = MQTTClient(MQTT_CLIENT_ID, MQTT_SERVER, MQTT_PORT, MQTT_USERNAME, MQTT_PASSWORD, 60)
self.mqtt_client.set_callback(TencentMQTT.control)
self.mqtt_client.connect()
"""
接收订阅的消息（用于远程控制）
"""
@staticmethod
def control(topic, msg):
pass
"""
发送设备的状态消息
"""
def report(self):
msg = {
"method": "report",
"clientToken": "clientToken-0123456789",
"params": {
"Illuminance": self.light_sensor.value()
}
}
self.mqtt_client.publish(MQTT_DEVICE_STATUS_TOPIC.encode(), ujson.dumps(msg).encode())
"""
消息循环
"""
def loop(self):
self.mqtt_client.subscribe(MQTT_DEVICE_CONTROL_TOPIC.encode())
up_time = 5000
time_sleep = 50
time_count = 0
while True:
self.mqtt_client.check_msg()
time_count += time_sleep
if (time_count >= up_time):
self.report()
time_count = 0
time.sleep_ms(time_sleep)
from machine import PWM
from machine import Pin
class LED():
"""
LED模块
"""
def __init__(self, rpin, gpin, bpin, freq=1000):
"""
构造函数
:param pin: 接LED的管脚，必须支持PWM
:param freq: PWM的默认频率是1000
"""
self.pin_red = Pin(rpin)
self.pin_green = Pin(gpin)
self.pin_blue = Pin(bpin)
self.led_red = PWM(self.pin_red, freq = freq)
self.led_green = PWM(self.pin_green, freq = freq)
self.led_blue = PWM(self.pin_blue, freq = freq)
def rgb_light(self, red, green, blue, brightness):
if red in range(256) and \
green in range(256) and \
blue in range(256) and \
0.0 <= brightness and \
brightness <=1.0:
self.led_red.duty(int(red/255*brightness*1023))
self.led_green.duty(int(green/255*brightness*1023))
self.led_blue.duty(int(blue/255*brightness*1023))
else:
print("red green blue must between 0 and 255, and brightness from 0.0 to 1.0")
def deinit(self):
"""
析构函数
"""
self.led_red.deinit()
self.led_green.deinit()
self.led_blue.deinit()
esptool.py --chip esp32 --port /dev/cu.usbserial-1410 erase_flash
esptool.py --chip esp32 --port /dev/cu.usbserial-1410 --baud 460800 write_flash -z 0x1000 esp32-idf3-20210202-v1.14.bin
import ubluetooth
ble = ubluetooth.BLE()
ble.active(True)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: [Errno 110] ETIMEDOUT
esptool.py read_mac 命令，确认连接成功。$ esptool.py read_mac
esptool.py v3.0
Found 2 serial ports
Serial port /dev/cu.usbserial-0001
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: f4:cf:a2:ec:0a:86
Uploading stub...
Running stub...
Stub running...
MAC: f4:cf:a2:ec:0a:86
Hard resetting via RTS pin...
$ ls /dev/cu*
/dev/cu.Bluetooth-Incoming-Port /dev/cu.usbserial-0001
esptool.py --port /dev/cu.usbserial-0001 erase_flash
烧录固件 esptool.py --port /dev/cu.
&>)echo hello &> log.info
$ cat log.info
hello
> filename <<EOF)cat > hello.sh << EOF
#!/bin/bash
echo hello
EOF
let)let n=10-3+4/2
echo $n
9
$ vim test.sh
#!/bin/bash
echo $str
$ chmod u+x test.sh
$ bash test.sh
$ ./test.sh
$ source test.sh
hello world
$ . test.sh
hello world
export)，父进程定义的变量子进程可见。$ export str
$ bash test.sh
hello world
$ source test.sh
hello world
unset)$ unset str
$ echo $str
$$ 当前进程ID$ echo $$
26102
$0 当前进程名$ echo $0
-bash
$ echo ${ips[@]}
10.0.0.1 10.0.0.2 10.0.0.3
抽取视频的关键帧，保存为zip文件。
-c, --create Create a new archive. Arguments supply the names of the files to be archived.
-x, --extract, --get Extract files from an archive.
-z, --gzip, --gunzip, --ungzip Filter the archive through gzip(1).
-j, --bzip2 Filter the archive through bzip2(1).
-f, --file=ARCHIVE Use archive file or device ARCHIVE. If this option is not given, tar will first examine the environment variable `TAPE'. If it is set, its value will be used as the archive name. Otherwise, tar will assume the compiled-in default.
-t, --list List the contents of an archive.
-v, --verbose Verbosely list files processed.
排除所有的 yaml 文件
zip -r yolov5.zip yolov5/ -x "*yolo*.yaml"
只查看文件名 $ zipinfo -1 yolov5.zip yolov5/ yolov5/hubconf.py yolov5/tutorial.ipynb yolov5/Dockerfile yolov5/README.md yolov5/.dockerignore yolov5/models/ yolov5/models/common.py yolov5/models/export.py yolov5/models/yolov5s.yaml yolov5/models/yolo.py yolov5/models/init.py yolov5/models/experimental.py yolov5/models/yolov5m.yaml yolov5/models/yolov5l.yaml yolov5/models/yolov5x.yaml yolov5/LICENSE yolov5/.gitignore yolov5/test.py yolov5/train.py yolov5/weights/ yolov5/weights/download_weights.sh yolov5/requirements.
du - 估计文件空间使用量
-s, --summarize display only a total for each argument
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
top -p 1
top -p1
top - 22:58:02 up 323 days, 12:09, 2 users, load average: 0.64, 0.61, 0.38
Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie
%Cpu(s): 7.2 us, 1.8 sy, 0.0 ni, 90.3 id, 0.0 wa, 0.5 hi, 0.2 si, 0.0 st
MiB Mem : 3780.8 total, 400.2 free, 1749.6 used, 1631.0 buff/cache
MiB Swap: 0.0 total, 0.0 free, 0.0 used. 1939.3 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 178540 7680 3792 S 0.0 0.2 7:50.54 systemd
Ubuntu
sudo apt install vim-gtk3
运行
vim -g
gvim
:!command 运行shell命令:!ls -l 查看当前目录列表:!ifconfig 查看本地IP地址v 进入字符可视w 选择下一个单词0 选择到行首$ 选择到行尾c 剪切选择的字符d 删除选择的字符x 删除选择的字符ggVG 选择所有的字符y 复制选择的字符:%y 复制所有的字符dd 剪切当前行3dd 剪切3行y$ 复制当前字符到行尾:y 复制当前行yy 复制当前行3yy 复制3行:y+ 复制光标所在行（也可以先使用块的方式进行选择再复制）:%y+ 复制所有数据p 粘贴x 删除当前字符:1,$d 删除所有行（1第一行开始，$直到文件末尾，d删除）dw 删除光标所在字符到单词的末尾diw 删除光标所在的整个单词d0 删除光标所在字符到行首d$ 删除光标所在字符到行尾dG 删除光标所在行到文件末尾:%s/search_word/replace_word/g 替换(全文):1,$s/search_word/replace_word/g 替换(全文):3,4s/search_word/replace_word/g 替换(3-4行):%s/search_word//g 删除(全文):1,$s/search_word//g 删除(全文):3,4s/search_word//g 删除(3-4行)在文件之间建立链接
ln [OPTION]... [-T] TARGET LINK_NAME
ln [OPTION]... TARGET
ln [OPTION]... TARGET... DIRECTORY
ln [OPTION]... -t DIRECTORY TARGET...
rm /var/www/ubuntu
更改文件所有者和组
chown [OPTION]... [OWNER][:[GROUP]] FILE...
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