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author | Vinay Sajip <vinay_sajip@yahoo.co.uk> | 2013-01-23 09:32:10 (GMT) |
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committer | Vinay Sajip <vinay_sajip@yahoo.co.uk> | 2013-01-23 09:32:10 (GMT) |
commit | 9427b0313346fc629d9b3f5e0134fbacb8533c06 (patch) | |
tree | 467f72d228636da8545dbae52204a997a021d64f /Doc/howto | |
parent | 8bea200b98356c931aed6ae3ddfe2e1f5400ab71 (diff) | |
parent | 3d9e972270270e1498712065a17ec3a589ae8986 (diff) | |
download | cpython-9427b0313346fc629d9b3f5e0134fbacb8533c06.zip cpython-9427b0313346fc629d9b3f5e0134fbacb8533c06.tar.gz cpython-9427b0313346fc629d9b3f5e0134fbacb8533c06.tar.bz2 |
Merged doc update from 3.2.
Diffstat (limited to 'Doc/howto')
-rw-r--r-- | Doc/howto/logging-cookbook.rst | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/Doc/howto/logging-cookbook.rst b/Doc/howto/logging-cookbook.rst index b812f7b..36a550e 100644 --- a/Doc/howto/logging-cookbook.rst +++ b/Doc/howto/logging-cookbook.rst @@ -1622,7 +1622,7 @@ Implementing structured logging Although most logging messages are intended for reading by humans, and thus not readily machine-parseable, there might be cirumstances where you want to output messages in a structured format which *is* capable of being parsed by a program -(without needed complex regular expressions to parse the log message). This is +(without needing complex regular expressions to parse the log message). This is straightforward to achieve using the logging package. There are a number of ways in which this could be achieved, but the following is a simple approach which uses JSON to serialise the event in a machine-parseable manner:: @@ -1647,6 +1647,9 @@ If the above script is run, it prints:: message 1 >>> {"fnum": 123.456, "num": 123, "bar": "baz", "foo": "bar"} +Note that the order of items might be different according to the version of +Python used. + If you need more specialised processing, you can use a custom JSON encoder, as in the following complete example:: @@ -1655,6 +1658,7 @@ as in the following complete example:: import json import logging + # This next bit is to ensure the script runs unchanged on 2.x and 3.x try: unicode except NameError: @@ -1677,7 +1681,7 @@ as in the following complete example:: s = Encoder().encode(self.kwargs) return '%s >>> %s' % (self.message, s) - _ = StructuredMessage + _ = StructuredMessage # optional, to improve readability def main(): logging.basicConfig(level=logging.INFO, format='%(message)s') @@ -1690,3 +1694,6 @@ When the above script is run, it prints:: message 1 >>> {"snowman": "\u2603", "set_value": [1, 2, 3]} +Note that the order of items might be different according to the version of +Python used. + |