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24 lines
988 B
Python
24 lines
988 B
Python
import re
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from typing import List
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def expand_pairlist(wildcardpl: List[str], available_pairs: List[str]) -> List[str]:
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"""
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Expand pairlist potentially containing wildcards based on available markets.
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This will implicitly filter all pairs in the wildcard-list which are not in available_pairs.
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:param wildcardpl: List of Pairlists, which may contain regex
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:param available_pairs: List of all available pairs (`exchange.get_markets().keys()`)
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:return expanded pairlist, with Regexes from wildcardpl applied to match all available pairs.
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:raises: ValueError if a wildcard is invalid (like '*/BTC' - which should be `.*/BTC`)
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"""
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result = []
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for pair_wc in wildcardpl:
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try:
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comp = re.compile(pair_wc)
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result += [
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pair for pair in available_pairs if re.match(comp, pair)
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]
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except re.error as err:
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raise ValueError(f"Wildcard error in {pair_wc}, {err}")
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return result
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