Parse comma-delimited ~ASCII sections #265

[dcslagel]

Description:

Parse comma-delimited ~ASCII sections #265. This is primarily for parsing the data section of LAS-3.0 files. It should work for LAS-3.0 files using the standard Curves, Parameter, and ASCII sections and for LAS-3.0 files using the Log_Definition, Log_Parameter and Log_Data sections.

Change Details:

• Add define_line_splitter(). It will configure a line_splitter()
  function based on the identified data delimiter. This works for
  the normal engine. The numpy engine still needs work
• Add comma-delimiter regexp list to defaults.py::READ_POLICIES
• Add provisional_delimiter variable to hold the identifed delimiter
• Move the call to reader.get_substitutions() to after
  provisional_delimter is fully defined.
• Load the las3_data_section_indices as data_section_indicies if
  after initial scan of the las file the original data_section_inidices
  is empty and las3_data_section_indicies is populated
• Add the line_splitter func as a parameter when calling
  reader.read_data_section_iterative_normal_engine()
• Add logic conditional to associate the ~Log_* sections with the standard equivalent sections.

Notes:

• This change works with the normal parsing engine.

I left these changes out of this specific pull-request. They can be implemented in future pull-requests

• Making the update for the "Numpy" parsing engine .
• Add a parameter enabling the user to specify which Data Delimiter to parse the data with.

Test-Results

All tests pass.
One of the LAS-3.0 tests is updated to reflect that the change will store a LAS-3.0 ~Log_Definition sections data in Lasio's Curve section and the LAS-3.0's ~Log_Parameter section in Lasio's Parameter section.

Name                       Stmts   Miss  Cover
----------------------------------------------
lasio/__init__.py             28      6    79%
lasio/convert_version.py      20     20     0%
lasio/defaults.py             11      0   100%
lasio/examples.py             42     10    76%
lasio/excel.py                88     34    61%
lasio/exceptions.py            6      0   100%
lasio/las.py                 503     72    86%
lasio/las_items.py           199     29    85%
lasio/las_version.py          50     14    72%
lasio/reader.py              463     28    94%
lasio/writer.py              200     10    95%
----------------------------------------------
TOTAL                       1610    223    86%

--
Let me know if this change could be accepted (or rejected) or
needs some additional changes to be approved and merged.

Thank you,
DC

[kinverarity1]

Looks great. Thank you so much for this! 🔥 🎈