Hi, soonix, thank you for the comments.

Could you explain more? What output buffer do you mean? A buffer allocated by print() function?

Wired thing is that I monitor the execution of the script through a putty terminal and find it hangs there for a long while on 2/14 and leave it there. When I am back to it on 2/15 I find it still hangs. So I connect to the machine through the console. When I am in the console it resumes suddenly. The machine configuration is: IBM server -> InReach TTY -> terminal.

In reply to Re^2: print() function hang for long time by dengguochen2003
in thread print() function hang for long time by dengguochen2003

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