mirror of
https://github.com/wassname/catalyst.git
synced 2026-06-28 14:29:26 +08:00
Stephen Diehl
53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
"""
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Small classes to assist with timezone calculations, LOGGER configuration,
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and other common operations.
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"""
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# DEPRECATED DO NOT USE
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import logging
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import logging.config
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from os.path import join, abspath, dirname
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def configure_logging():
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logging.config.fileConfig(
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logger_path(),
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disable_existing_loggers = False
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)
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def logger_path():
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import zipline
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log_path = dirname(abspath(zipline.__file__))
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return join(log_path, 'logging.cfg')
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# utility for tailing a log file.
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def tail( f, window=20 ):
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"""
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from
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http://stackoverflow.com/questions/136168/get-last-n-lines-of-a-file- \
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with-python-similar-to-tail
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"""
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BUFSIZ = 1024
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f.seek(0, 2)
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bytes = f.tell()
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size = window
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block = -1
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data = []
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while size > 0 and bytes > 0:
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if (bytes - BUFSIZ > 0):
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# Seek back one whole BUFSIZ
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f.seek(block*BUFSIZ, 2)
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# read BUFFER
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data.append(f.read(BUFSIZ))
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else:
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# file too small, start from begining
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f.seek(0,0)
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# only read what was not read
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data.append(f.read(bytes))
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linesFound = data[-1].count('\n')
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size -= linesFound
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bytes -= BUFSIZ
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block -= 1
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return '\n'.join(''.join(data).splitlines()[-window:])
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