使用Scapy生成数据包PDF时，如何抑制PyX警告消息？

Question

我正在使用Scapy的pdfdump方法生成数据包的PDF：

from scapy.layers.inet import ICMP, IP

packet = IP(dst="192.168.111.1") / ICMP()
packet.pdfdump("report.pdf")

执行此代码后， PyX库会打印出许多消息。

PyX executes tex with args ['--output-directory', '/tmp/pyx1ojf7_d9'] located at /usr/bin/tex
PyX filelocator found 10pt.lfs by method internal
PyX executes kpsewhich with args ['--format', 'vf', 'cmss10'] located at /usr/bin/kpsewhich
PyX filelocator failed to find cmss10 of type ('vf',) and extensions {'', '.vf'}
PyX executes kpsewhich with args ['--format', 'tfm', 'cmss10'] located at /usr/bin/kpsewhich
PyX filelocator found cmss10 by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/tfm/public/cm/cmss10.tfm
PyX executes kpsewhich with args ['--format', 'vf', 'cmtt10'] located at /usr/bin/kpsewhich
PyX filelocator failed to find cmtt10 of type ('vf',) and extensions {'', '.vf'}
PyX executes kpsewhich with args ['--format', 'tfm', 'cmtt10'] located at /usr/bin/kpsewhich
PyX filelocator found cmtt10 by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/tfm/public/cm/cmtt10.tfm
PyX executes kpsewhich with args ['--format', 'map', 'pdftex.map'] located at /usr/bin/kpsewhich
PyX filelocator found pdftex.map by method kpsewhich at /var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map
PyX executes kpsewhich with args ['--format', 'type1 fonts', 'cmss10.pfb'] located at /usr/bin/kpsewhich
PyX filelocator found cmss10.pfb by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmss10.pfb
PyX executes kpsewhich with args ['--format', 'afm', 'cmss10'] located at /usr/bin/kpsewhich
PyX filelocator found cmss10 by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/afm/public/amsfonts/cm/cmss10.afm
PyX executes kpsewhich with args ['--format', 'type1 fonts', 'cmtt10.pfb'] located at /usr/bin/kpsewhich
PyX filelocator found cmtt10.pfb by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmtt10.pfb
PyX executes kpsewhich with args ['--format', 'afm', 'cmtt10'] located at /usr/bin/kpsewhich
PyX filelocator found cmtt10 by method kpsewhich at /usr/share/texlive/texmf-dist/fonts/afm/public/amsfonts/cm/cmtt10.afm

有没有办法禁用或禁止显示这些消息，使它们不被打印出来？ PyX手册没有太多关于如何调整这些消息的详细程度的信息。

Answer 1

使用标准python日志记录框架在日志记录级别logging.INFO上创建此输出。 默认情况下，此类日志记录输出会静音，因为默认情况下为logging.WARNING（IIRC）。 无论如何，只要调整您的日志记录级别，以防止通知困扰您。 另外，您可能会看到pyxinfo调用，这是PyX提供的启用此输出的解决方案。 （也许这是您正在使用的库在某处调用的，您想禁用它。）请注意，PyX的这种行为也记录在http://pyx.sourceforge.net/manual/text.html#debugging