如何在Python中将日志写入字节或内存流？

Question

I want to write a running log to some kind of memory or byte stream. For example, in C# or Java, there exists a memorystream object to accomplish this. Is there some way I can facilitate writing a log to memory in Python?

Instead of this:

file_handle = open("log.txt", "w")
# ...
if (some_error):
    file_handle.write("event 1:...")
    file_handle.write("event 2:...")
    # ...
file_handle.close()

I want to write a running log to some structure in memory. What is best practice for this in Python? A String object? Something else?

Thank you.

Answer 1

如果您正在寻找带有类似文件的接口的字符串，那么您需要的是StringIO

Answer 2

It looks like the StreamHandler class best describes what you are looking for.

"The StreamHandler class, located in the core logging package, sends logging output to streams such as sys.stdout, sys.stderr or any file-like object (or, more precisely, any object which supports write() and flush() methods)."

And this HOWTO describes logging in python in detail.