All Purpose Dict

Table of Contents

• What is it?
• Why create it?
• Simple usage
• See Also
• Api
• Test

What is it?

• A dict which doesn't require hashable keys

Why create it?

• I often have a need to store non-hashable keys in a dict. For example storing a dict as a key isn't possible with the builtin dict.

  # doesn't work
  someDict = { "key": "value" }
  anotherDict = { someDict: "anotherValue" }
  

Simple usage

from all_purpose_dict import ApDict

someDict = { "key": "value" }
anotherDict = ApDict([(someDict, "anotherValue")])

print(someDict in anotherDict) # prints True

See Also

• All Purpose Set

Api

Note: This api is young and subject to change quite a bit. There also may be functionality present in the builtin dict which ApDict doesn't cover. I'm willing to add it so please just raise a github issue or PR with details.

class ApDict([a list of pairs])

• 'pairs' may be either a list or tuple with a length of 2
• all methods return self unless specified otherwise
• iterates in the order of insertion
• views are not implemented because I don't have a need for them. Instead I expose keysIterator and valuesIterator. If you need views then raise a github issue.
• the internal methods implemented are
  • __contains__
  • __delitem__
  • __getitem__
  • __iter__
  • __len__
  • __setitem__

clear()

delete(key)

• a function alternative to del aDict[key]

get(key, default=None) => value

• get the value for key if key is in the dictionary, else default.
• note: this never raises a KeyError.

has(key) => bool

• a function alternative to key in aDict

getKeysIterator() => ApDictKeysIterator

set(key, value)

• a function alternative to aDict[key] = val

getValuesIterator() => ApDictValuesIterator

Test

#
# you must have poetry installed
#
$ poetry shell
$ poetry install
$ python runTests.py