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Description:

paramparser 1.0.0

param-parser

param-parser is a parser library for a param string expression. Those expressions are arbitrary strings with
placeholders in it, where a placeholder consists of a name, an optional type and a list of options.
Installation
With a correctly configured pipenv toolchain:
pipenv install param-parser

You may also use classic pip to install the package:
pip install param-parser

Getting started
Examples of param string expressions look as follows:
this-is-a-{param:string:option1,option2,option3}-expression
this-is-a-{param:string}-expression
this-is-a-{param}-expression

As you see, a param is introduced by an opening curly bracket, followed by the name of the param, a colon, the type of
the param, another colon and a comma separated list of options. The param configuration gets terminated by a closing
curly bracket. Note that the type and option configuration are optional, but the name is mandatory.
To parse an expression shown above, use the Python code as follows:
import param_parser

result = param_parser.parse(r"this-is-a-{param:string:option1,option2,option3}-expression")

result[0] # Gets a `param_parser.node.SequenceNode` instance
result[0].sequence_value # Gets `"this-is-a-"` as a string

result[1] # Gets a `param_parser.node.ParamNode` instance
result[1].param_name # Gets `"param"` as a string
result[1].param_type # Gets `"string"` as a string
result[1].param_options # Gets `["option1", "option2", "option3"]` as a list of strings

result[2] # Gets a `param_parser.node.SequenceNode` instance
result[2].sequence_value # Gets `"-expression"` as a string

It is also possible to escape opening curly brackets, closing curly brackets, colons and commas as follows:
import param_parser

result = param_parser.parse(r"this-is-a-\{param:string:option1,option2,option3\}-expression")

result[0] # Gets a `param_parser.node.SequenceNode` instance
result[0].sequence_value # Gets `"this-is-a-{param:string:option1,option2,option3}-expression"` as a string

Supported versions

Supported

Python 3.7
✓

Python 3.8
✓

Python 3.9
✓

Python 3.10
✓

Python 3.11
✓

List of developers

Andreas Stocker AStocker@anexia-it.com, Lead Developer