bash - How do I filter Python screen print? -

i want filter screen print python program.

ideally, nice specify "print blacklist", such one.

*futurewarning* info* 

when part of screen printout matches 1 of above patterns, whole printout filtered out.

i'm surprised no 1 has yet ask question, think extremely useful, because without it, need go through different types of screen printouts , deal them accordingly. can imagine of them may due print, due warning, etc.

i running python script bash, bash-based methods welcome too!

i want filter screen print python program.

you can use python's logging module, routing print , warnings output through it:

# in main module import logging  # -- log output myapp.log logging.basicconfig(filename='myapp.log', level=logging.debug) # -- or log output console logging.basicconfig(level=logging.debug) # route output logging logging.capturewarnings(true) print  = logging.info   

with add own filter filter output per required keywords:

# define filter in own module, logfilter.py class outputfilter(logging.filter):     def __init__(self, keywords, name=none):         super(outputfilter, self).__init__(name)         self.keywords = keywords      def filter(self, record):         msg = record.getmessage()         return not any(k in msg k in self.keywords)  # add in main module logfilter import outputfilter flt = outputfilter(['*futurewarning*', 'info*']) logger = logging.getlogger() # root logger logger.addfilter(flt) warnlogger = logging.getlogger('py.warnings') # warnings logger warnlogger.addfilter(flt) 

(...) without it, need go through different types of screen printouts , deal them accordingly.

if can change source code better use module logger instead of print:

# in module output, right after imports logger = logging.getlogger(__name__) ... # instead of print logger.info(...) logger.error(...) logger.debug(...) 

the advantage logging allows fine grained control on output , where, while configuring central place.

for example, while above uses root logger applies logging output, every module of application can have own logger, specific configuration, e.g.

# somewhere in main module # -- basic config console logging.basicconfig(level=logging.debug) # -- module output should go own file logger = logging.getlogger('path.to.module.a') handler = logging.filehandler(filename='myapp-a.log') # see above logger.sethandler(handler)  logger.setlevel(logging.info)  # path/to/module/a.py # -- right @ top of module import logging logger = logging.getlogger(__name__) ... # in actual code logger.info('info message') 

this example route info messages module file myapp-a.log while other output goes terminal.

note: examples adopted python logging cookbook. check out tutorial more in-depth explanations.