pyparsing v2.0.2 Release Notes
Release Date: 2014-04-01 // about 10 years ago-
Extended "expr(name)" shortcut (same as "expr.setResultsName(name)") to accept "expr()" as a shortcut for "expr.copy()".
➕ Added "locatedExpr(expr)" helper, to decorate any returned tokens with their location within the input string. Adds the results names locn_start and locn_end to the output parse results.
➕ Added "pprint()" method to ParseResults, to simplify troubleshooting and prettified output. Now instead of importing the pprint module and then writing "pprint.pprint(result)", you can just write "result.pprint()". This method also accepts addtional positional and keyword arguments (such as indent, width, etc.), which get passed through directly to the pprint method (see https://docs.python.org/2/library/pprint.html#pprint.pprint).
✂ Removed deprecation warnings when using '<<' for Forward expression assignment. '<<=' is still preferred, but '<<' will be retained for cases where '<<=' operator is not suitable (such as in defining lambda expressions).
Expanded argument compatibility for classes and functions that take list arguments, to now accept generators as well.
📜 Extended list-like behavior of ParseResults, adding support for append and extend. NOTE: if you have existing applications using these names as results names, you will have to access them using dict-style syntax: res["append"] and res["extend"]
📜 ParseResults emulates the change in list vs. iterator semantics for methods like keys(), values(), and items(). Under Python 2.x, these methods will return lists, under Python 3.x, these methods will return iterators.
📜 ParseResults now has a method haskeys() which returns True or False depending on whether any results names have been defined. This simplifies testing for the existence of results names under Python 3.x, which returns keys() as an iterator, not a list.
📜 ParseResults now supports both list and dict semantics for pop(). If passed no argument or an integer argument, it will use list semantics and pop tokens from the list of parsed tokens. If passed a non-integer argument (most likely a string), it will use dict semantics and pop the corresponding value from any defined results names. A second default return value argument is supported, just as in dict.pop().
🛠 Fixed bug in markInputline, thanks for reporting this, Matt Grant!
✅ Cleaned up my unit test environment, now runs with Python 2.6 and 3.3.