@@ -497,7 +497,7 @@ You can't use lists as keys, since lists can be modified in place using index
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assignments, slice assignments, or methods like :meth: `append ` and
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:meth: `extend `.
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- It is best to think of a dictionary as an unordered set of *key: value * pairs,
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+ It is best to think of a dictionary as a set of *key: value * pairs,
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with the requirement that the keys are unique (within one dictionary). A pair of
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braces creates an empty dictionary: ``{} ``. Placing a comma-separated list of
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key:value pairs within the braces adds initial key: value pairs to the
@@ -509,26 +509,26 @@ pair with ``del``. If you store using a key that is already in use, the old
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value associated with that key is forgotten. It is an error to extract a value
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using a non-existent key.
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- Performing ``list(d.keys() ) `` on a dictionary returns a list of all the keys
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- used in the dictionary, in arbitrary order (if you want it sorted, just use
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- ``sorted(d.keys() ) `` instead). [2 ]_ To check whether a single key is in the
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+ Performing ``list(d) `` on a dictionary returns a list of all the keys
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+ used in the dictionary, in insertion order (if you want it sorted, just use
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+ ``sorted(d) `` instead). [2 ]_ To check whether a single key is in the
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dictionary, use the :keyword: `in ` keyword.
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Here is a small example using a dictionary::
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>>> tel = {'jack': 4098, 'sape': 4139}
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>>> tel['guido'] = 4127
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>>> tel
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- {'sape ': 4139 , 'guido ': 4127 , 'jack ': 4098 }
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+ {'jack ': 4098 , 'sape ': 4139 , 'guido ': 4127 }
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>>> tel['jack']
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4098
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>>> del tel['sape']
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>>> tel['irv'] = 4127
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>>> tel
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- {'guido ': 4127 , 'irv ': 4127, 'jack ': 4098 }
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- >>> list(tel.keys() )
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- ['irv ', 'guido', 'jack ']
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- >>> sorted(tel.keys() )
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+ {'jack ': 4098 , 'guido ': 4127, 'irv ': 4127 }
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+ >>> list(tel)
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+ ['jack ', 'guido', 'irv ']
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+ >>> sorted(tel)
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['guido', 'irv', 'jack']
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>>> 'guido' in tel
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True
@@ -539,7 +539,7 @@ The :func:`dict` constructor builds dictionaries directly from sequences of
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key-value pairs::
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>>> dict([('sape', 4139), ('guido', 4127), ('jack', 4098)])
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- {'sape': 4139, 'jack ': 4098 , 'guido ': 4127 }
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+ {'sape': 4139, 'guido ': 4127 , 'jack ': 4098 }
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In addition, dict comprehensions can be used to create dictionaries from
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arbitrary key and value expressions::
@@ -551,7 +551,7 @@ When the keys are simple strings, it is sometimes easier to specify pairs using
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keyword arguments::
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>>> dict(sape=4139, guido=4127, jack=4098)
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- {'sape': 4139, 'jack ': 4098 , 'guido ': 4127 }
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+ {'sape': 4139, 'guido ': 4127 , 'jack ': 4098 }
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.. _tut-loopidioms :
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