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# -*- coding: utf-8 -*- |
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from benedict.core import traverse |
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from benedict.utils import type_util |
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import re |
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KEY_INDEX_RE = r"(?:\[[\'\"]*(\-?[\d]+)[\'\"]*\]){1}$" |
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KEY_WILDCARD_RE = r"(?:\[[\'\"]*(\-?[\*]+)[\'\"]*\]){1}$" |
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def check_keys(d, separator): |
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""" |
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Check if dict keys contain keypath separator. |
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""" |
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if not type_util.is_dict(d) or not separator: |
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return |
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def check_key(parent, key, value): |
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if key and type_util.is_string(key) and separator in key: |
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raise ValueError( |
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f"Key should not contain keypath separator '{separator}', found: '{key}'." |
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) |
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traverse(d, check_key) |
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def parse_keys(keypath, separator): |
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""" |
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Parse keys from keylist or keypath using the given separator. |
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""" |
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if type_util.is_list_or_tuple(keypath): |
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keys = [] |
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for key in keypath: |
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keys += parse_keys(key, separator) |
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return keys |
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return _split_keys_and_indexes(keypath, separator) |
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def _split_key_indexes(key): |
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""" |
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Splits key indexes: |
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eg. 'item[0][1]' -> ['item', 0, 1]. |
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""" |
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if "[" in key and key.endswith("]"): |
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keys = [] |
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while True: |
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index_matches = re.findall(KEY_INDEX_RE, key) |
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if index_matches: |
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key = re.sub(KEY_INDEX_RE, "", key) |
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index = int(index_matches[0]) |
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keys.insert(0, index) |
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continue |
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index_matches = re.findall(KEY_WILDCARD_RE, key) |
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if bool(re.search(KEY_WILDCARD_RE, key)): |
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key = re.sub(KEY_WILDCARD_RE, "", key) |
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index = index_matches[0] |
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keys.insert(0, index) |
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continue |
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keys.insert(0, key) |
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break |
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return keys |
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return [key] |
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def _split_keys(keypath, separator): |
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""" |
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Splits keys using the given separator: |
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eg. 'item.subitem[1]' -> ['item', 'subitem[1]']. |
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""" |
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if separator: |
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return keypath.split(separator) |
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return [keypath] |
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def _split_keys_and_indexes(keypath, separator): |
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""" |
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Splits keys and indexes using the given separator: |
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eg. 'item[0].subitem[1]' -> ['item', 0, 'subitem', 1]. |
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""" |
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if type_util.is_string(keypath): |
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keys1 = _split_keys(keypath, separator) |
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keys2 = [] |
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for key in keys1: |
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keys2 += _split_key_indexes(key) |
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return keys2 |
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return [keypath] |
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fabiocaccamo /
python-benedict
