List of changes¶
Unreleased changes (Available on GitHub)¶
Version 0.31 (18 May 2023)¶
Many improvements to code style and formatting, and the documentation
#555 - Fix problem when writing with changed data (different number of depths)
#552 - Remove or replace cchardet with chardet
#530 - Detect hyphens in data section and adjust regexp_subs as needed
Fix #322 - provide a way to consistently retrieve header items which may or may not be present in the header:
If you try ordinary item-style access, as is normal in Python, a KeyError exception will be raised if it is missing:
>>> permit = las.well['PRMT'] Traceback (most recent call last): File "<stdin>", line 1, in <module> File "c:\devapps\kinverarity\projects\lasio\lasio\las_items.py", line 313, in __getitem__ raise KeyError("%s not in %s" % (key, self.keys())) KeyError: "PRMT not in ['STRT', 'STOP', 'STEP', 'NULL', 'COMP', 'WELL', 'FLD', 'LOC', 'PROV', 'SRVC', 'DATE', 'UWI']"
A better pattern is to use the
lasio.SectionItems.get()
method, which allows you to specify a default value in the case of it missing:>>> permit = las.well.get('PRMT', 'unknown') >>> permit HeaderItem(mnemonic="PRMT", unit="", value="unknown", descr="")
You can use the
add=True
keyword argument if you would like this header item to be added, as well as returned:>>> permit = las.well.get('PRMT', 'unknown', add=True) >>> las.well [HeaderItem(mnemonic="STRT", unit="M", value="0.05", descr="FIRST INDEX VALUE"), HeaderItem(mnemonic="STOP", unit="M", value="136.6", descr="LAST INDEX VALUE"), HeaderItem(mnemonic="STEP", unit="M", value="0.05", descr="STEP"), HeaderItem(mnemonic="NULL", unit="", value="-99999", descr="NULL VALUE"), HeaderItem(mnemonic="COMP", unit="", value="", descr="COMP"), HeaderItem(mnemonic="WELL", unit="", value="Scorpio E1", descr="WELL"), HeaderItem(mnemonic="FLD", unit="", value="", descr=""), HeaderItem(mnemonic="LOC", unit="", value="Mt Eba", descr="LOC"), HeaderItem(mnemonic="SRVC", unit="", value="", descr=""), HeaderItem(mnemonic="CTRY", unit="", value="", descr=""), HeaderItem(mnemonic="STAT", unit="", value="SA", descr="STAT"), HeaderItem(mnemonic="CNTY", unit="", value="", descr=""), HeaderItem(mnemonic="DATE", unit="", value="15/03/2015", descr="DATE"), HeaderItem(mnemonic="UWI", unit="", value="6038-187", descr="WUNT"), HeaderItem(mnemonic="PRMT", unit="", value="unknown", descr="")]
Version 0.30 (12 May 2022)¶
- Fixes for #446 (Implement a numpy-based reader for the data section; `#452`_) and #444 (Provide a way to benchmark speed performance of LASFile.read; `#449`_). This leads to a more than two-fold improvement in speed (e.g. from 1091 msec to 341 msec for a large sample file).
- Fixes for #439 (Data section containing non-numeric chars is parsed entirely as str) and #227 (NULL value replacing valid value in DEPT) by allowing different data types for different columns (PRs `#459`_, `#460`_, `#461`_)
- Partially fix #375 (allow writing mnemonics in ~ASCII line; PRs `#466`_, `#471`_, `#465`_)
- Partial fix for #265 (Parse comma-delimited ~ASCII sections; `#485`_)
- Fix #83 (LAS file with more curves defined in ~C section than available in ~A section; `#480`_)
- Improve visibility and access to the Code of Conduct (`#469`_)
- Fix #453 (rounding issues when writing LAS file) (`#455`_)
- Fix #268 (remove side-effects from writer) (`#447`_, `#451`_)
- Documentation updates (`#475`_, #477, `#481`_, `#501`_, `#498`_, `#500`_)
- Fix #473 (Header lines without a period are discarded unnecessarily)
- Fix #472 (Detect and raise IOError exception for LiDAR files; `#482`_)
- Fix #483 (perfomance decrease in DEBUG logging level; `#484`_)
- Fix #478 (:1 :2 should only be appended to mnemonics when using LASFile.read) with `#479`_: Add update_curve and replace_curve_item methods to LASFile
- Fix #490 (LAS 2.1 reading error; `#491`_)
- Fix #486 (Adding a citation file, and maybe a DOI; `#487`_)
- Fix #392 (ignore_comments not mentioned in documentation; `#495`_)
- Fix #332: Describe default read_policies in docstring, with `#489`_
- Fix #502 (NumPy type conversion alias deprecation; `#503`_)
- minor performance improvements (`#470`_, )
Version 0.29 (14 April 2021)¶
- Fix #404 (lasio changes STEP with imprecise floating-point number behaviour; `#432`_)
- Add option
len_numeric_field=-1
,lhs_spacer=" "
, andspacer=" "
to writer.py:write (see #412; PR `#418`_) - Fix #271 (Read quoted strings in data section properly; `#423`_)
- Fix #427 (Change null_policy to handle small non-zero values; `#429`_)
- Fix #417 (Fix parsing for empty ~Other section; `#430`_)
- Fix #402 (fixes issue when unit starts with dot; `#403`_)
- Fix #395 (Update doc examples to reflect new HeaderItem repr; `#410`_)
- Fix #426 (Update urllib.request to be the preferred urllib; `#428`_)
- Add check for pushed tag version to version tests (`#396`_)
- Update GitHub Action Python CI testing (`#399`_, `#400`_)
- Improve
las_items.py:HeaderItem.__repr__
truncation logic (`#397`_) - Remove codecs import (unused) and fix typo (`#406`_)
- Exclude LAS files from GitHubs Language Stats (`#411`_)
- Re-add try-except check around call to reader.read_data_section_iterative() (`#401`_)
- Remove reader.py:read_file_contents - unused code (see `#401`_; `#393`_)
- Add test for timestring with colon in ~Well section (see #419 - PR `#420`_)
- Fix SyntaxWarning in writer.py (`#425`_)
- Add bugfix and feature request issue templates to GitHub repository
- Apply
black
code style to all Python files (`#438`_, `#398`_) - Update demo notebook for using logging levels with current behaviour
- Update contributing guide (`#437`_, `#441`_)
Version 0.28 (12 September 2020)¶
- Major re-write of reader code working towards LAS 3.0 support (`#327`_; `#347`_, `#345`_, `#353`_, `#355`_, `#358`_, `#367`_, `#368`_, `#369`_)
- Fix #377 (writing “None” as the value instead of “”; #377)
- Fix #373 (enable GitHub Actions CI testing on MacOS, Windows, Ubuntu; `#374`_, `#387`_)
- Fix #363 (parse composite units such as “1000 lbf” correctly; `#390`_)
- Fix #319 (allow skipping comment lines in data sections; `#391`_)
- Avoid unnecessary exceptions on reading LAS 3.0 data sections (`#385`_)
- Fix broken ReadTheDocs build
Version 0.26 (31 August 2020)¶
- This is the final version which works on Python 2.7 (#364)
- Fix #333 (header lines not parsed when colon is in description; `#335`_)
- Fix #359 (sections not found when leading whitespace in line; `#360`_, `#361`_)
- Fix #350 (bug with NULL; `#352`_)
- Fix #339 (0.1IN not recognised as index unit; `#340`_, `#349`_)
- Fix #31 (add command-line script to convert between LAS versions; `#329`_)
- Fix #75 (add Cyrillic variant for metres; `#330`_)
- Fix `#326`_ (Support header-only LAS files–don’t lose the last header section before a missing ~A section)
- Improve documentation regarding deleting items and curves (#315, `#325`_)
- Add deprecation markers (`#331`_)
- Align json.dumps and LASFile.to_json() (`#328`_)
- Fixes and updates to setup.py relating to the adoption of setuptools_scm (#312, `#317`_, `#318`_)
- Clean up and background changes related to future LAS 3.0 support: `#334`_, `#337`_, `#338`_, `#341`_, `#342`_, `#346`_, `#348`_, `#372`_
Version 0.25.1 (1 May 2020)¶
Version 0.25 (28 March 2020)¶
- Add stack_curves() method to allow joining a set of curves into a 2D array (issue #284, PR `#293`_)
- Add lasio.examples module (`#296`_)
- Fix #278 (leading zeroes were being stripped from API/UWI numbers)
- Fix `#286`_ (error on trying to write a file with one row of data)
- Fix `#258`_ (do not catch Ctrl+C when reading file)
- Fix `#292`_ (improve error checking for when trying to write non-2D data)
- Fix #277 (allow pathlib objects to lasio.read)
- Fix #264 (allow periods in mnemonics to be retained in specific cases)
- Fix #201 (adjust descr parsing in ~P section to allow times in the descr, see PR `#298`_)
- Fix `#302`_ (change in str(datetime) handling)
- Fixes to JSON output (`#300`_, #303)
- Fix #304 (add column_fmt argument to LASFile.write method)
Version 0.23¶
Version 0.22¶
Version 0.21¶
Version 0.20¶
- Fix #233 (pickling error lost Curve.data during multiprocessing)
- Fix #226 (do not issue warning on empty ~Parameter section)
- Revised default behaviour to using null_policy=’strict’ (ref. #227)
- Fix `#221`_ (depths > 10000 were being rounded by default)
- Fix `#225`_ (file handle leaked if exception during parsing)
Version 0.18¶
- Fix version numbering setup
- Fix #92 (can ignore blah blah lines in ~C section)
- Fix #209 (can now add curves with LASFile[‘mnemonic’] = [1, 2, 3])
- Fix #213 (LASFile.data is now a lazily generated property, with setter)
- Fix #218 (LASFile.append_curve was not adding data=[…] properly)
- Fix #216 (LASFile now raises KeyError for missing mnemonics)
- Fix #214 (first duplicate mnemonic when added was missing the :1)
Version 0.17¶
- Add Appveyor continuous integration testing
- Add example notebook for how to use python logging module
- Fix #160 (add methods to LASFile for inserting curves)
- Fix #155 (implement del keyword for header items)
- Fix #142 (implement slicing for SectionItems)
- Fix #135 (UWI numbers losing their leading zeros)
- Fix #153 (fix SectionItems pprint repr in Python 3)
- Fix #81 (accept header items with missing colon)
- Fix #71 (add Docker build for lasio to DockerHub)
- Fix #210 (allow upper/lowercase standardization of mnemonics on read)
- Document recent additions (nearly up to date) (in Sphinx docs)
Version 0.16¶
- Add read_policy and null_policy keywords - see documentation for details
- Fix bugs around files with missing ~V ~W ~P or ~C sections (#84 #85 #78)
- Fix #17 involving files with commas as a decimal mark
- Improve LASHeaderError traceback message
- Fix bug involving files with ~A but no data lines following
- Fix bug with blank line at start of file
- Fix bug involving missing or duplicate STRT, STOP and STEP mnemonics
Version 0.15.1¶
- Major performance improvements with both memory and speed
- Major improvement to read parser, now using iteration
- Add
LASFile.to_excel()
andLASFile.to_csv()
export methods - Improve
las2excelbulk.py
script - Published new and updated Sphinx documentation
- Improved character encoding handling when
chardet
not installed autodetect_encoding=True
by default- Allow reading of multiple non-standard header sections (#167, `#168`_)
- Add flexibility in reading corrupted headers (
ignore_header_errors=True
) - Add ability to avoid reading in data (
ignore_data=True
) - Remove excessive debugging messages
- Fix bug #164 where
FEET
was not recognised asFT
- Fix major globals() bug #141 affecting LASFile.add_curve
- Add command-line version script
$ lasio
to show version number.
Version 0.14 and 0.15 skipped due to broken PyPI upload.
Version 0.13¶
- Other minor bug fixes inc inability to rename mnemonics in written LAS file.
Version 0.11.2¶
- Fix bug with not correctly figuring out units for LASFile.write()
- Add
LASFile.add_curve(CurveItem)
method which automatically goes to the old method atLASFile.add_curve_raw(mnemonic=, data=, ...)
if necessary, so it should be transparent to users
Version 0.11¶
- Reorganise code into modules
- various
Version 0.10¶
- Internal change to SectionItems for future LAS 3.0 support
- Added JSON encoder
- Added examples for using pandas DataFrame (.df attribute)
- LAS > Excel script refined (las2excel.py)
Version 0.9.1 (2015-11-11)¶
- pandas.DataFrame now as .df attribute, bugfix
Version 0.8 (2015-08-20)¶
- numerous bug fixes, API documentation added
Version 0.7 (2015-08-08)¶
- all tests passing on Python 2.6 through 3.4
Version 0.6 (2015-08-05)¶
- bugfixes and renamed from
las_reader
tolasio
Version 0.5 (2015-08-01)¶
- Improvements to writing LAS files
Version 0.4 (2015-07-26)¶
- Improved handling of character encodings, other internal improvements
Version 0.3 (2015-07-23)¶
- Added Python 3 support, now reads LAS 1.2 and 2.0
Version 0.2 (2015-07-08)¶
- Tidied code and published on PyPI