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Find out if a process exists based on PID
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| import os | |
| import errno | |
| def pid_exists(pid): | |
| """Check whether pid exists in the current process table.""" | |
| if pid < 0: | |
| return False | |
| try: | |
| os.kill(pid, 0) | |
| except OSError, e: | |
| return e.errno == errno.EPERM | |
| else: | |
| return True |
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