6 examples of 'python dict key exist' in Python

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

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38def has_key(key, keys):
39 for k in keys:
40 if k['id'] == key:
41 return True
42 return False
53def __contains__(self, key):
54 return str(key) in self.data
5def _find_dict_in_list(list_of_dict, key, val):
6 """Given a list of dictionaries, return the first dictionary that has the
7 given key:value pair.
8 """
9 try:
10 for d in list_of_dict:
11 if (key, val) in d.items():
12 return d
13 except TypeError:
14 pass
21def has_key(self, key):
22 try:
23 value = self[key]
24 except KeyError:
25 return False
26 return True
84def __contains__(self, key):
85 if '.' not in key:
86 return dict.__contains__(self, key)
87 myKey, restOfKey = key.split('.', 1)
88 if myKey in self:
89 target = dict.__getitem__(self, myKey)
90 else:
91 return False
92 if not isinstance(target, dotdict):
93 return False
94 return restOfKey in target

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