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# -*- coding: utf-8 -*- |
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from six import string_types, text_type |
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from slugify import slugify |
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import copy |
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import json |
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import re |
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def clean(d, strings=True, dicts=True, lists=True): |
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keys = list(d.keys()) |
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for key in keys: |
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value = d.get(key, None) |
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if not value: |
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if value is None or \ |
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strings and isinstance(value, string_types) or \ |
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dicts and isinstance(value, dict) or \ |
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lists and isinstance(value, (list, set, tuple, )): |
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del d[key] |
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def clone(d): |
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return copy.deepcopy(d) |
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def dump(data): |
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def encoder(obj): |
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json_types = (bool, dict, float, int, list, tuple, ) + string_types |
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if not isinstance(obj, json_types): |
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return str(obj) |
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return json.dumps(data, indent=4, sort_keys=True, default=encoder) |
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def filter(d, predicate): |
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if not callable(predicate): |
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raise ValueError('predicate argument must be a callable.') |
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new_dict = d.__class__() |
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keys = list(d.keys()) |
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for key in keys: |
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value = d.get(key, None) |
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if predicate(key, value): |
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new_dict[key] = value |
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return new_dict |
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def flatten(d, separator='_', base=''): |
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new_dict = d.__class__() |
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keys = list(d.keys()) |
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for key in keys: |
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keypath = '{}{}{}'.format( |
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base, separator, key) if base and separator else key |
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value = d.get(key, None) |
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if isinstance(value, dict): |
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new_value = flatten(value, separator=separator, base=keypath) |
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new_value.update(new_dict) |
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new_dict.update(new_value) |
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else: |
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new_dict[keypath] = value |
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return new_dict |
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def invert(d, flat=False): |
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new_dict = d.__class__() |
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if flat: |
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for key, value in d.items(): |
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new_dict.setdefault(value, key) |
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else: |
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for key, value in d.items(): |
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new_dict.setdefault(value, []).append(key) |
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return new_dict |
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def items_sorted_by_keys(d, reverse=False): |
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return sorted(d.items(), key=lambda item: item[0], reverse=reverse) |
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def items_sorted_by_values(d, reverse=False): |
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return sorted(d.items(), key=lambda item: item[1], reverse=reverse) |
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def keypaths(d, separator='.'): |
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if not separator or not isinstance(separator, string_types): |
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raise ValueError('separator argument must be a (non-empty) string.') |
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def f(parent, parent_keys): |
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kp = [] |
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for key, value in parent.items(): |
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keys = parent_keys + [key] |
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kp += [separator.join(text_type(k) for k in keys)] |
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if isinstance(value, dict): |
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kp += f(value, keys) |
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return kp |
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kp = f(d, []) |
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kp.sort() |
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return kp |
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def merge(d, other, *args): |
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others = [other] + list(args) |
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for other in others: |
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for key, value in other.items(): |
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src = d.get(key, None) |
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if isinstance(src, dict) and isinstance(value, dict): |
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merge(src, value) |
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else: |
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d[key] = value |
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return d |
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def move(d, key_src, key_dest): |
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if key_dest == key_src: |
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return |
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d[key_dest] = d.pop(key_src) |
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def remove(d, keys, *args): |
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if isinstance(keys, string_types): |
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keys = [keys] |
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keys += args |
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for key in keys: |
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d.pop(key, None) |
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def standardize(d): |
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def f(parent, key, value): |
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if isinstance(key, string_types): |
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# https://stackoverflow.com/a/12867228/2096218 |
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norm_key = re.sub( |
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r'((?<=[a-z0-9])[A-Z]|(?!^)[A-Z](?=[a-z]))', r'_\1', key) |
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norm_key = slugify(norm_key, separator='_') |
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move(parent, key, norm_key) |
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traverse(d, f) |
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def subset(d, keys, *args): |
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new_dict = d.__class__() |
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if isinstance(keys, string_types): |
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keys = [keys] |
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keys += args |
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for key in keys: |
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new_dict[key] = d.get(key, None) |
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return new_dict |
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def swap(d, key1, key2): |
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if key1 == key2: |
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return |
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d[key1], d[key2] = d[key2], d[key1] |
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150
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def traverse(d, callback): |
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if not callable(callback): |
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raise ValueError('callback argument must be a callable.') |
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keys = list(d.keys()) |
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for key in keys: |
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value = d.get(key, None) |
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callback(d, key, value) |
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if isinstance(value, dict): |
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traverse(value, callback) |
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def unique(d): |
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values = [] |
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keys = list(d.keys()) |
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for key in keys: |
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value = d.get(key, None) |
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if value in values: |
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d.pop(key, None) |
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continue |
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values.append(value) |
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fabiocaccamo /
python-benedict
