我正在使用线程搜索文件：import threadingdef thread(seconds): for root, dirs, files in os.walk('/'): for file in files: if file == 'Viber.exe': viber = os.path.join(root, file) print(viber) print("Finish")threading.Thread(target = thread, args = (1,), daemon = True).start()之后我需要打开那条路：import subprocesssubprocess.check_output(viber, shell=True)但我收到错误：NameError: name 'viber' is not defined我不知道该怎么做，以及如何解决它（（（请有人帮忙！
1 回答
青春有我
TA贡献1784条经验 获得超8个赞
当您viber在函数中声明变量时，python 认为该变量是本地变量，并会在函数结束时将其删除。
您只需要声明viber为全局变量，这样函数就不会声明它自己的变量。
viber = None # declare global variable # add this line
import threading
def thread(seconds):
global viber # use global variable # add this line
for root, dirs, files in os.walk('/'):
for file in files:
if file == 'Viber.exe':
viber = os.path.join(root, file)
print(viber)
print("Finish")
threading.Thread(target = thread, args = (1,), daemon = True).start()
###########
import subprocess
subprocess.check_output(viber, shell=True) # use global variable
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