This command can be used to execute arbitrary Python scripts while avoiding unnecessary boilerplate code to load datasets and store results. This command is also useful for testing functionality and results via the commandline interface and for asserting arbitrary conditions in scripts.
First, optional dataset(s) are loaded from one or more sources. Afterwards any number of given expressions (see --exec) are executed. An expression can be given as an argument on the command line, read from a file, or from STDIN. The return value of any given expression is ignored (not evaluated anyhow), only exceptions are treated as errors and cause the command to exit with a non-zero return value. To implement tests and assertions it is best to utilize a Python unittest framework such as 'nose'.
In the namespace in which all expressions are evaluated the NumPy module is available via the alias 'np', and the nose.tools under the alias 'nt' (if installed). Any loaded datasets are available as a list named ``dss``. The first dataset in that list (if any) is available under the name ``ds``.
Check for the presence of a particular sample attribute in a dataset
Extract and store results
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.