Type-guided parsing library for converting strings to Python objects
Project description
strto
strto
is a Python library for parsing strings into Python objects based on types and type annotations.
Installation
From PyPi
pip install strto
From source
pip install git+https://github.com/zigai/strto.git
Examples
>>> from strto import get_parser
>>> parser = get_parser()
>>> parser.parse("5", int)
5
>>> parser.parse("1.5", int | float)
1.5
>>> parser.parse("1,2,3,4,5", list[int])
[1, 2, 3, 4, 5]
>>> parser.parse('{"a":1,"b":2,"c":3}', dict[str, int])
{'a': 1, 'b': 2, 'c': 3}
import datetime
>>> parser.parse("2022.07.19", datetime.date)
datetime.date(2022, 7, 19)
>>> parser.parse("0:5:1", range)
range(0, 5, 1)
>>> import enum
>>> class Color(enum.Enum):
... RED = 1
... GREEN = 2
... BLUE = 3
>>> parser.parse("RED", Color)
Color.RED
Add custom parser
from dataclasses import dataclass
from strto import ParserBase, get_parser
@dataclass
class NetworkAddress:
host: str
port: int
class NetworkAddressParser(ParserBase):
def parse(self, value: str) -> NetworkAddress:
host, port = value.rsplit(":")
return NetworkAddress(host=host, port=int(port))
parser = get_parser()
parser.add(NetworkAddress, NetworkAddressParser())
result = parser.parse("example.com:8080", NetworkAddress)
print(result) # NetworkAddress(host='example.com', port=8080)
# You can also use a function
def parse_network_address(value: str) -> NetworkAddress:
host, port = value.rsplit(":")
return NetworkAddress(host=host, port=int(port))
parser = get_parser()
parser.add(NetworkAddress, parse_network_address)
result = parser.parse("example.com:8080", NetworkAddress)
print(result) # NetworkAddress(host='example.com', port=8080)
License
Project details
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Source Distribution
strto-0.1.6.tar.gz
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Built Distribution
strto-0.1.6-py3-none-any.whl
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