parsec.py | universal Python parser combinator library | Parser library
kandi X-RAY | parsec.py Summary
kandi X-RAY | parsec.py Summary
A universal Python parser combinator library inspired by Parsec library of Haskell.
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Top functions reviewed by kandi - BETA
- r Parser .
- Execute a parser .
- Decorate a function into a parser .
- Character sequence .
- Parse optional parser .
- Parse a regular expression .
- Parser a string .
- Parse a partial string .
- Combine a list of values .
- Exclude given parser .
parsec.py Key Features
parsec.py Examples and Code Snippets
Lines of Code : 2License : Strong Copyleft (CC BY-SA 4.0)
Copytestp = digit >> id
import re, collections
def parse_line(l):
return [re.findall('\[.*?\]|[\w\s]+', i.strip()) for i in re.split('\s*\-\>\s*', l)]
lines = [parse_line(i) for i in open('test_input.txt') if not re.findall('[\{\}]', i)]
def get_vals(d, s from scipy.ndimage.filters import gaussian_filter
dk_gf = gaussian_filter(delta_kappa, sigma=20)
Xfinal, Yfinal = np.meshgrid(xfinal,yfinal)
plt.contourf(Xfinal,Yfinal,dk_ma,100, cmap='jet')
plt.show();
>>> map(lambda x,y: x+y, range(10), range(10))
[0, 2, 4, 6, 8, 10, 12, 14, 16, 18]
>>> map(None, {'foo': 1, 'bar': 2})
['foo', 'bar']
>>> map(None, [1, 2, 3], [4,Community Discussions
Trending Discussions on parsec.py
QUESTION
Note: I am importing the parsec library, which overloads the >>= (i.e. - __irshift()__) operator.
The following Python code:
...ANSWER
Answered 2022-Jan-08 at 00:34Because >>= is a statement, not an expression. It doesn't evaluate to a result that can be assigned to testp.
Perhaps you were looking for this?
QUESTION
I want to parse a string like this:
Object A -> Object B [AB_name] Object B -> Object C [BC_name] ...
My goal is to obtain three lists:
Parents = ['Object A', 'Object B', ...]
Children = ['Object B', 'Object C', ...]
PC_names = ['AB_name','BC_name', ...]
I already have a working solution but it is incomprehensible thus difficult to maintain and not very robust. Basically my code iterates with two loops over the string and thereby adds the substrings the several lists.
To fix this I read about the parsec.py lib, but so far I couldn't find a good example for complete newbies like me. I already tried to figure out how it works with the help of other articles and the documentation but with little success by now.
I'm glad about every hint.
The test_input.txt:
...ANSWER
Answered 2021-Jul-18 at 15:50This solution uses re and recursion parse the input lines and traverse the result, yielding back parents, children, and pc_names:
QUESTION
I have a basic question about parsing using Python's parsec.py library.
I would like to extract the date somewhere inside a text. For e.g,
...ANSWER
Answered 2021-Jun-08 at 04:13What you want is a parser which skip any unmatched chars, then parse a regex pattern followed.
The date pattern could be defined with regex parser,
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install parsec.py
You can use parsec.py like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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