haldis/app/utils.py

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"Script which contains several utils for Haldis"
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import re
from typing import Iterable, Optional
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def euro_string(value: Optional[int], unit="") -> str:
"""
Convert cents to string formatted euro
"""
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if value is None:
return ""
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euro, cents = divmod(value, 100)
if cents:
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return f"{unit}{euro}.{cents:02}"
return f"{unit}{euro}"
def parse_euro_string(value: str) -> Optional[int]:
m = re.fullmatch("(?:€ ?)?([0-9]+)(?:[.,]([0-9]+))?", value)
if not m:
return None
cents_02 = "{:0<2.2}".format(m.group(2)) if m.group(2) else "00"
return int(m.group(1)) * 100 + int(cents_02)
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def price_range_string(price_range, include_upper=False):
"Convert a price range to a string formatted euro"
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if price_range[0] == price_range[1]:
return euro_string(price_range[0])
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return ("{}{}" if include_upper else "from {}").format(
*map(euro_string, price_range)
)
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def first(iterable: Iterable, default=None):
"""
Return first element of iterable
"""
try:
return next(iter(iterable))
except StopIteration:
return default
def ignore_none(iterable: Iterable):
"Filter to ignore None objects"
return filter(lambda x: x is not None, iterable)