dict
- dict(**kwargs)
- dict(mapping, /, **kwargs)
- dict(iterable, /, **kwargs)
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object's
(key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
d = {}
for k, v in iterable:
d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
in the keyword argument list. For example: dict(one=1, two=2)© Python Software Foundation. PSF License Version 2 · Official docs ↗
Changed in 3.7, 3.8
- 3.7: Dictionary order is guaranteed to be insertion order. This behavior was an implementation detail of CPython from 3.6.
- 3.8: Dictionaries are now reversible.
Members of dict
f
- fromkeys
- Create a new dictionary with keys from iterable and values set to value.
g
- get
- Return the value for key if key is in the dictionary, else default.
i
- items
- Return a set-like object providing a view on the dict's items.
k
- keys
- Return a set-like object providing a view on the dict's keys.
p
s
- setdefault
- Insert key with a value of default if key is not in the dictionary.
u
- update
- If E is present and has a .keys() method, then does: for k in E.keys(): D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by:…
v
- values
- Return an object providing a view on the dict's values.
1 Example
>>> a = dict(one=1, two=2, three=3) >>> b = {'one': 1, 'two': 2, 'three': 3} >>> c = dict(zip(['one', 'two', 'three'], [1, 2, 3])) >>> d = dict([('two', 2), ('one', 1), ('three', 3)]) >>> e = dict({'three': 3, 'one': 1, 'two': 2}) >>> f = dict({'one': 1, 'three': 3}, two=2) >>> a == b == c == d == e == f True
from the Python docs