如何解决Python自更新程序通过树莓派更新后无法启动新程序的问题

我希望制作一款可自动更新至最新版本的Python程序：添加新功能后，把更新文件上传到树莓派这类中心存储位置，让所有设备上的程序自动完成更新，无需逐个手动操作。

我编写了如下代码，程序能识别自身是否为最新版本，也能成功下载新程序并删除旧文件，但新程序无法启动，且无任何错误提示。

更新测试代码（updaterV1.py） #

#updaterV1.py
import time
import requests
import os
import hashlib
time.sleep(5)
cwd = os.getcwd()
URL = r"http://[rasberry pi's ip]/update%20files/dev/hash.txt"
hash_path = os.path.join(cwd,"remote hash.txt")

with open (hash_path, "wb") as f:
    f.write(requests.get(URL).content)

with open(hash_path,"r") as hash_file:
    remotehash = (hash_file.readline()).strip()
os.remove(hash_path)

hasher = hashlib.sha256()
with open(__file__, 'rb') as self_file:
    selfunhashed = self_file.read()

hasher.update(selfunhashed)
selfhash = hasher.hexdigest()

print(selfhash)
print(remotehash)

if (selfhash == remotehash):
    print("program is up to date")
    input()
else:
    update_path =  os.path.join(cwd,"temp name update.py") 
    URL = r"http://[rasberry pi's ip]/update%20files/dev/update.py" 


    with open (update_path, "wb") as f:
        f.write(requests.get(URL).content)

    with open(update_path,"r") as f:
        name = f.readline().strip() 
        name = name[1:] #use the 1st line as "#name.py" not "# name"
    update_path = os.path.join(cwd,name)
    try:
        os.remove(update_path)
    except:
        pass
    os.rename(os.path.join(cwd,"temp name update.py"),update_path)
    os.system("python \""+update_path+"\"") 
    print("removing self file now")
    os.remove(__file__) 

该代码通过存储在远程目录下的独立TXT文件保存程序哈希值，无需下载完整远程程序即可对比哈希值判断是否需要更新。

内容的提问来源于stack exchange，提问作者Ice129