logstart(self, parameter_s='')
%logstart [-o|-r|-t|-q] [log_name [log_mode]]
If no name is given, it defaults to a file named 'ipython_log.py' in your current directory, in 'rotate' mode (see below).
'%logstart name' saves to file 'name' in 'backup' mode. It saves your history up to that point and then continues logging.
%logstart takes a second optional parameter: logging mode. This can be one of (note that the modes are given unquoted):
append
Keep logging at the end of any existing file.
backup
Rename any existing file to name~ and start name.
global
Append to a single logfile in your home directory.
over
Overwrite any existing log.
rotate
Create rotating logs: name.1~, name.2~, etc.
Options:
-o
log also IPython's output. In this mode, all commands which generate an Out[NN] prompt are recorded to the logfile, right after their corresponding input line. The output lines are always prepended with a '#[Out]# ' marker, so that the log remains valid Python code.
Since this marker is always the same, filtering only the output from a log is very easy, using for example a simple awk call:
awk -F'#\[Out\]# ' '{if($2) {print $2}}' ipython_log.py
-r
log 'raw' input. Normally, IPython's logs contain the processed input, so that user lines are logged in their final form, converted into valid Python. For example, %Exit is logged as _ip.magic("Exit"). If the -r flag is given, all input is logged exactly as typed, with no transformations applied.
-t
put timestamps before each input line logged (these are put in comments).
-q
suppress output of logstate message when logging is invoked
Start logging anywhere in a session.
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