- 明确需求（更新程式）
1.通過wxpython，産生一個窗體，窗體上有一段[文字标簽]，一個[進度條]，一個[開始按鈕]。
2.點選【開始按鈕】，下載下傳網絡資源檔案
http://example.cn/test.zip。進度條和文字标簽同時顯示百分比
3.下載下傳完成後，解壓到指定目錄。如果指定目錄下有檔案，則覆寫掉。
- 設計界面
wxpython-通過request遠端下載下傳網絡zip檔案，并解壓安裝檔案
- 程式關鍵點
1.wxpython用的進度條控件是wx.guage.定義如下：
self.gauge_1 = wx.Gauge(self, wx.ID_ANY, 100, style=wx.GA_HORIZONTAL | wx.GA_SMOOTH) 設定進度條的方法如下：msg填的是數字
self.download_gauge.SetValue(msg) 2.因為下載下傳時間長，是以需要在主線程外再啟用一個線程下載下傳，避免程式假死。
3.通過request.Session().get方法下載下傳比request.get下載下傳要快
requests.Session().get(url, verify=False, stream=True) 4.通過stream的形式可以獲得下載下傳進度。如下，message是下載下傳進度，例如10%，message為10
for chunk in response.iter_content(chunk_size=512):
if chunk:
code.write(chunk)
code.flush()
i = i + 512
number = int(i)
message = number * 100 / total_length 5.Zipfile解壓檔案，如果解壓目錄下有同名檔案，則會直接覆寫掉
azip = zipfile.ZipFile(zip_file_path)
azip.extractall(path=unzip_to_path) - 完整代碼(frame窗體和event事件)
updateOTAFrame.py（窗體檔案，用wxglade建立）
#!/usr/bin/env python
# -*- coding: UTF-8 -*-
#
# generated by wxGlade 0.9.0pre on Thu Sep 06 09:41:05 2018
#
import wx
# begin wxGlade: dependencies
# end wxGlade
# begin wxGlade: extracode
# end wxGlade
class MyFrame(wx.Frame):
def __init__(self, *args, **kwds):
# begin wxGlade: MyFrame.__init__
kwds["style"] = kwds.get("style", 0) | wx.DEFAULT_FRAME_STYLE
wx.Frame.__init__(self, *args, **kwds)
self.SetSize((475, 137))
self.label_1 = wx.StaticText(self, wx.ID_ANY, "start")
self.gauge_1 = wx.Gauge(self, wx.ID_ANY, 100, style=wx.GA_HORIZONTAL | wx.GA_SMOOTH)
self.button_1 = wx.Button(self, wx.ID_ANY, "start")
self.__set_properties()
self.__do_layout()
# end wxGlade
def __set_properties(self):
# begin wxGlade: MyFrame.__set_properties
self.SetTitle(u"\u5347\u7ea7\u7a0b\u5e8f")
# end wxGlade
def __do_layout(self):
# begin wxGlade: MyFrame.__do_layout
sizer_1 = wx.BoxSizer(wx.VERTICAL)
sizer_2 = wx.BoxSizer(wx.VERTICAL)
sizer_2.Add(self.label_1, 1, 0, 0)
sizer_2.Add(self.gauge_1, 1, wx.EXPAND, 0)
sizer_2.Add(self.button_1, 1, wx.ALIGN_CENTER, 0)
sizer_1.Add(sizer_2, 1, wx.EXPAND, 0)
self.SetSizer(sizer_1)
self.Layout()
# end wxGlade
# end of class MyFrame updateOTAevent.py(事件檔案，和窗體檔案分開）
# -*- coding: UTF-8 -*-
import os
import zipfile
from threading import Thread
import requests
import wx
from wx.lib.pubsub import pub
from view.window import updateOTAFrame
class MyApp(wx.App):
def OnInit(self):
self.frame = updateOTAFrame.MyFrame(None, wx.ID_ANY, "")
self.frame.CenterOnScreen()
self.download_gauge = self.frame.gauge_1
self.start_button = self.frame.button_1
self.frame.timer = wx.Timer(self.frame) # 建立定時器
# 綁定一個定時器事件，wxpython存在bug,不設定定時器，pub功能不會正常啟用
self.frame.Bind(wx.EVT_TIMER, self.on_timer, self.frame.timer)
self.frame.Show()
self.start_button.Bind(wx.EVT_BUTTON, self.start_event)
pub.subscribe(self.update_ota, "ota_topic")
pub.subscribe(self.download_text_topic, "download_text_topic")
self.download_text = self.frame.label_1
self.download_text.SetLabelText("點選開始更新按鈕，即刻開始更新")
self.start_button.SetLabelText("開始更新")
pub.subscribe(self.close_frame, "close_download_topic")
return True
# 下載下傳完成後，關閉視窗
def close_frame(self, msg):
self.frame.Destroy()
# 開始下載下傳按鈕事件
def start_event(self, event):
self.start_button.SetLabelText("正在更新")
self.download_text.SetLabelText("正在下載下傳更新包，請不要關閉程式,目前進度：0%")
self.start_button.Disable()
GuageThread()
event.Skip()
# 控制下載下傳的時候的文字
def download_text_topic(self, msg):
if msg < 100:
self.download_text.SetLabelText("正在下載下傳更新包，請不要關閉程式,目前進度：" + str(msg) + "%")
else:
self.download_text.SetLabelText('下載下傳成功，現在開始解壓，請耐心等待大于10秒')
self.start_button.SetLabelText('正在解壓')
# 控制下載下傳的進度條
def update_ota(self, msg):
if msg < 100: # 如果是數字，說明線程正在執行，顯示數字
self.download_gauge.SetValue(msg)
else:
self.download_gauge.SetValue(msg)
def on_timer(self, evt): # 定時執行檢查網絡狀态
pass
# 另外啟動一個線程來控制進度條，不然程式會假死
class GuageThread(Thread):
def __init__(self):
# 線程執行個體化時立即啟動
Thread.__init__(self)
self.start()
def run(self):
# 線程執行的代碼
self.download_file()
def download_file(self):
# url = "http://example.cn/test.zip" 是網絡上的zip壓縮封包件
url = "http://example.cn/test.zip"
# 通過Session來下載下傳，速度比直接requests.get快了大約百分之30
response = requests.Session().get(url, verify=False, stream=True)
total_length = int(response.headers.get("Content-Length"))
with open(os.path.abspath(os.getcwd() + "/resource/download/new.zip"), "wb") as code:
i = 0
temp = 0
# 用chunk_size的方法來下載下傳，可以知道目前的下載下傳進度。chunk_size影響每次寫入的記憶體大小
for chunk in response.iter_content(chunk_size=512):
if chunk:
code.write(chunk)
code.flush()
i = i + 512
number = int(i)
# 因為進度條的長度設定成了100，是以這裡要乘以100
message = number * 100 / total_length
wx.CallAfter(pub.sendMessage, "ota_topic", msg=message)
if temp != message:
temp = message
wx.CallAfter(pub.sendMessage, "download_text_topic", msg=message)
filepath = os.path.abspath(os.getcwd() + "/resource/download/new.zip")
# 直接放在程式根目錄下了
foldpath = os.path.abspath(os.getcwd())
self.unzip(filepath, foldpath)
wx.CallAfter(pub.sendMessage, "close_download_topic", msg=1)
# 解壓檔案用的zipfile，将解壓的檔案，放置到指定路徑下（覆寫複制）
def unzip(self, zip_file_path, unzip_to_path):
unzip_flag = False
try:
check_zip_flag = zipfile.is_zipfile(zip_file_path)
if check_zip_flag:
azip = zipfile.ZipFile(zip_file_path)
azip.extractall(path=unzip_to_path)
unzip_flag = True
except Exception as e:
print e.message
finally:
print "unzip_flag==========", unzip_flag
return unzip_flag
# end of class MyApp
if __name__ == "__main__":
app = MyApp(0)
app.MainLoop() 注： 把 url = "http://example.cn/test.zip" 修改為自己要下載下傳的網絡zip壓縮封包件。然後在updateOTAevent.py中運作即可。zip檔案會下載下傳完成後解壓至程式根目錄
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