我认为也许 python3 版本的 scapy 会打印来自不同记录器或更高级别的消息。这是我用来抑制模块导入输出的一些代码。
from contextlib import contextmanager
# It looks like redirect_stderr will be part of Python 3.5 as follows:
# from contextlib import redirect_stderr
# Perhaps if you're looking at this code and 3.5 is out, this function could be
# removed.
@contextmanager
def redirect_stderr(new_target):
"""
A context manager to temporarily redirect stderr. Example use:
with open(os.devnull, 'w') as f:
with redirect_stderr(f):
# stderr redirected to os.devnull. No annoying import messages
# printed on module import
from scapy.all import *
# stderr restored
"""
import sys
old_target, sys.stderr = sys.stderr, new_target # replace sys.stdout
try:
yield new_target # run some code with the replaced stdout
finally:
sys.stderr = old_target # restore to the previous value
# Don't print the annoying warning message that occurs on import
with open(os.devnull, 'w') as errf:
with redirect_stderr(errf):
from scapy.all import sr, ICMP, IP, traceroute