使用vscode给microPython上添加第三方库,并测试m5stack上用elementTree库解析xml文件
microPython并没有官方的xml解析工具,我在pfalcon/pycopy-lib: Standard library of the Pycopy project, minimalist and light-weight Python language implementation (github.com)里找到了精简的elementTree库(可以解析xml文件或者字符串的节点文本,属性等,但是对比完整的ET库并不能生成xml),下载地址pycopy-lib/xml.etree.ElementTree at master · pfalcon/pycopy-lib (github.com);pycopy-lib/xmltok2 at master · pfalcon/pycopy-lib (github.com)
需要下载两个文件 xmltok2.py,ElementTree.py,
在vscode的扩展里搜索 vscode-m5stack-mpy,安装后就可以简单的添加文件,也可以在vscode里直接让m5s直接执行python文件
点击下边的 Add M5Stack添加设备,加号新建文件,上箭头上传文件到m5s上,把下载下来的两个py文件上传到设备。 执行
import ElementTree as ET
dir(ET)
如果能显示ET库的方法,证明导入库成功
关于ET库的使用方法 (11条消息) Python xml.etree.ElementTree解析XML文件_凯耐的博客-CSDN博客_xml.etree.elementtree
这是我个人写的一个例子
from m5stack import * from m5ui import * from uiflow import * import time setScreenColor(0x222222) xmlString = None rootTag = None rootText = None root01tag = None root01text = None root01attrib = None label0 = M5TextBox(23, 33, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0) title0 = M5Title(title="Title", x=3, fgcolor=0xFFFFFF, bgcolor=0x0000FF) label1 = M5TextBox(23, 61, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0) label2 = M5TextBox(22, 87, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0) label3 = M5TextBox(22, 116, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0) label4 = M5TextBox(25, 151, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0) lcd.clear() import ElementTree as ET xmlString = '<?xml version="1.0"?> <data> <country name="Liechtenstein"> <rank>1</rank> <year>2008</year> <gdppc>141100</gdppc> <neighbor name="Austria" direction="E"/> <neighbor name="Switzerland" direction="W"/> </country> <country name="Singapore"> <rank>4</rank> <year>2011</year> <gdppc>59900</gdppc> <neighbor name="Malaysia" direction="N"/> </country> <country name="Panama"> <rank>68</rank> <year>2011</year> <gdppc>13600</gdppc> <neighbor name="Costa Rica" direction="W"/> <neighbor name="Colombia" direction="E"/> </country> </data>' lcd.clear() lcd.print(xmlString, 0, 0, 0xffffff) wait(2) lcd.clear() title0.setBgColor(0x000099) title0.setTitle('parsing...') root = ET.fromstring(xmlString) title0.setTitle('parsing complete') rootTag = 0 rootTag = root.tag label0.setText(str((str('root.tag:') + str(rootTag)))) rootText = 0 rootText = root.text label1.setText(str((str('root.text:') + str(rootText)))) root01tag = 0 root01tag = root[0][1].tag label2.setText(str((str('root[0][1].tag:') + str(root01tag)))) root01text = 0 root01Text = root[0][1].text label3.setText(str((str('root[0][1].text:') + str(root01text)))) root01attrib = 0 root01attrib = root[0][1].attrib label4.setText(str((str('root[0][1].attrib:') + str(root01attrib))))
实际运行效果 ,可以看出纯py在micropyhhon上运行还是比较慢的
4.69 FhB:/ m5stack添加第三方ET库来解析xml https://v.douyin.com/RRVMGCV/ 覆zhi此链接,打开Douyin搜索,直接观看视频!