mirror of
https://github.com/wassname/catalyst.git
synced 2026-07-02 06:45:49 +08:00
Eddie Hebert
90 lines
2.2 KiB
Python
90 lines
2.2 KiB
Python
#
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# Copyright 2012 Quantopian, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logbook
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from contextlib import contextmanager
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log = logbook.Logger("LogUtils")
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class redirector(object):
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def __init__(self, logger, name):
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self.logger = logger
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self.buffer = bytes()
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self.name = name
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def write(self, line):
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self.buffer += ''.join(['>>> ', line.strip('\n'), '\n'])
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def flush(self, final=False):
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if not self.buffer:
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return
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out_form = """ [{pipe_name}] \n{buffer}""".format(
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pipe_name=self.name,
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buffer=self.buffer
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)
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self.logger.error(out_form)
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self.buffer = bytes()
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class log_redirector(object):
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def __init__(self, logger):
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self.logger = logger
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def write(self, line):
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#Absorb blank lines from print statements.
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if line == '\n':
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return
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else:
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#TODO: add logic to guarantee we made this
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self.logger.info(line.strip('\n'))
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def flush(self, final=False):
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pass
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@contextmanager
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def stdout_pipe(logger, pipe_name):
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"""
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Pipe stdout and stderr into a python logger interface
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"""
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import sys
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orig_fds = sys.stdout, sys.stderr
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sys.stderr = redirector(logger, pipe_name)
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sys.stdout = redirector(logger, pipe_name)
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yield
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sys.stderr.flush()
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sys.stdout.flush()
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sys.stdout, sys.stderr = orig_fds
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@contextmanager
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def stdout_only_pipe(logger, pipe_name):
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"""
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Pipes just stdout into a python logger interface
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"""
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import sys
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orig_fd = sys.stdout
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sys.stdout = log_redirector(logger)
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yield
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sys.stdout.flush()
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sys.stdout = orig_fd
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