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Boris Lovosevic
b8fff81b45
'Ctrl+D' on empty line now performs full ESP32 soft reset 'math' module updated, added 'factorial' method 'uos' module updated, added 'mpycore' method to show MicroPython core git commit hash and date
56 lines
1.7 KiB
ReStructuredText
56 lines
1.7 KiB
ReStructuredText
:mod:`ucollections` -- collection and container types
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=====================================================
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.. module:: ucollections
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:synopsis: collection and container types
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|see_cpython_module| :mod:`python:collections`.
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This module implements advanced collection and container types to
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hold/accumulate various objects.
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Classes
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-------
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.. function:: namedtuple(name, fields)
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This is factory function to create a new namedtuple type with a specific
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name and set of fields. A namedtuple is a subclass of tuple which allows
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to access its fields not just by numeric index, but also with an attribute
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access syntax using symbolic field names. Fields is a sequence of strings
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specifying field names. For compatibility with CPython it can also be a
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a string with space-separated field named (but this is less efficient).
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Example of use::
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from ucollections import namedtuple
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MyTuple = namedtuple("MyTuple", ("id", "name"))
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t1 = MyTuple(1, "foo")
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t2 = MyTuple(2, "bar")
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print(t1.name)
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assert t2.name == t2[1]
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.. function:: OrderedDict(...)
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``dict`` type subclass which remembers and preserves the order of keys
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added. When ordered dict is iterated over, keys/items are returned in
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the order they were added::
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from ucollections import OrderedDict
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# To make benefit of ordered keys, OrderedDict should be initialized
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# from sequence of (key, value) pairs.
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d = OrderedDict([("z", 1), ("a", 2)])
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# More items can be added as usual
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d["w"] = 5
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d["b"] = 3
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for k, v in d.items():
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print(k, v)
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Output::
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z 1
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a 2
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w 5
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b 3
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