10 examples of 'check if key exists in dictionary python' 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
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
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
1def contains_val(data, key, value):
2 """
3 check if certain key has certain value, return true if so and false otherwise
4 """
5 # try to get value variable from parser specific variables
6 value = _ttp_["parser_object"].vars.get(value, value)
7 if not value in data.get(key, ""):
8 return data, False
9 return data, None
359def __contains__(self, key):
360 for i in self.value:
361 try:
362 if i.tag == key:
363 return True
364 except AttributeError:
365 # not a list of nodes
366 return False
367 return False
87def __contains__(self, key):
88 try:
89 self.tree[hash(key)]
90 return True
91 except KeyError: return False
86def assert_key_exists(self, key, caller):
87 """Assert that context contains key.
89 Args:
90 key: validates that this key exists in context
91 caller: string. calling function or module name - this used to
92 construct error messages
94 Raises:
95 KeyNotInContextError: When key doesn't exist in context.
97 """
98 assert key, ("key parameter must be specified.")
99 if key not in self:
100 raise KeyNotInContextError(
101 f"context['{key}'] doesn't exist. It must exist for {caller}.")
103def is_key_true(value: Union[PersistType, GenericPersistType[T]], key: str) -> bool:
104 """Test if the key is explicitly in the value and that the value for that key is explicitly the boolean True."""
105 if isinstance(value, Mapping) and key in value and value[key] is True:
106 return True
107 return False
113def __contains__(self, key):
114 """check if the key exists"""
115 return key in self.data

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