<p>在windows上使用多处理时,任何打开的文件句柄都会被派生的进程继承。这有一个令人不快的副作用锁定他们。在</p>
<p>我对其中一个感兴趣:<br/>
1) 防止继承<br/>
2) 从派生进程释放文件的方法</p>
<p>考虑下面的代码,它在OSX上运行良好,但在windows上崩溃操作系统重命名在</p>
<pre><code>from multiprocessing import Process
import os
kFileA = "a.txt"
kFileB = "b.txt"
def emptyProcess():
while 1:
pass
def main():
# Open a file and write a message
testFile = open(kFileA, 'a')
testFile.write("Message One\n")
# Spawn a process
p = Process(target=emptyProcess)
p.start()
# Close the file
testFile.close()
# This will crash
# WindowsError: [Error 32] The process cannot access the file
# because it is being used by another process
os.rename(kFileA, kFileB)
testFile = open(kFileA, 'a')
testFile.write("Message Two\n")
testFile.close()
p.terminate()
if __name__ == "__main__":
main()
</code></pre>