6 examples of 'python dict key exist' in Python

133
def _check_key_exists(d: dict, key: object, custom_exception=None) -> None:
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    """ Check if a key exists inside a dictionary. Otherwise, raise KeyError or a custom exception. """
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    try:
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        d[key]
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    except KeyError:
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        if custom_exception:
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            raise custom_exception
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        else:
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            raise KeyError

38
def has_key(key, keys):
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    for k in keys:
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        if k['id'] == key:
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            return True
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    return False

53
def __contains__(self, key):
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    return str(key) in self.data

5
def _find_dict_in_list(list_of_dict, key, val):
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    """Given a list of dictionaries, return the first dictionary that has the
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    given key:value pair.
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    """
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    try:
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        for d in list_of_dict:
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            if (key, val) in d.items():
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                return d
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    except TypeError:
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        pass

21
def has_key(self, key):
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    try:
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        value = self[key]
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    except KeyError:
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        return False
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    return True

84
def __contains__(self, key):
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  if '.' not in key:
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    return dict.__contains__(self, key)
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  myKey, restOfKey = key.split('.', 1)
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  if myKey in self:
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    target = dict.__getitem__(self, myKey)
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  else:
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    return False
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  if not isinstance(target, dotdict):
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    return False
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  return restOfKey in target