schettino72/mergedict

mergedict - A Python `dict` with a merge() method

mergedict - A Python dict with a merge() method

A MergeDict is a dict with a merge() method. merge() is like dict.update()...

from mergedict import MergeDict

d1 = MergeDict({'a': 1, 'b': 'one'})
d1.merge({'a':2, 'c': [2]})

assert d1 == {'a': 2, 'c': [2], 'b': 'one'}

A MergeDict can be subclassed to create custom "merge" operations based on the type of an item value.

from mergedict import MergeDict

class SumDict(MergeDict):
      @MergeDict.dispatch(int)
      def merge_int(this, other):
          return this + other

d2 = SumDict({'a': 1, 'b': 'one'})
d2.merge({'a':2, 'b': 'two'})

assert d2 == {'a': 3, 'b': 'two'}

mergedict module comes with a ConfigDict that will extend/update lists/sets/dicts.

from mergedict import ConfigDict

d3 = ConfigDict({'a': 1, 'my_list': [1, 2]})
d3.merge({'a':2, 'my_list': [3, 4]})

assert d3 == {'a': 2, 'my_list': [1, 2, 3, 4]}

Project Details

• Project management on github - https://github.com/schettino72/mergedict/

license

The MIT License Copyright (c) 2013 Eduardo Naufel Schettino

see LICENSE file

developers / contributors

• Eduardo Naufel Schettino — main author
• Sebastian Pipping — build system fixes

install

$ pip install mergedict

or download and:

$ python setup.py install

tests

To run the tests:

$ py.test

mergedict's Issues

New release with fixes for Python >=3.5 off master?

Hi!

It seems that commit c3f6333 never went into a Git tag or a release on PyPI. Could that be fixed to unbreak support for Python >=3.4?

Thanks and best, Sebastian

Cannot install from PyPI

When I do pip install mergedict I have:

  Downloading mergedict-0.1.1.tar.gz
  Running setup.py (path:/home/spinus/.virtualenvs/sphinx/build/mergedict/setup.py) egg_info for package mergedict
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/home/spinus/.virtualenvs/sphinx/build/mergedict/setup.py", line 10, in <module>
        os.path.join(os.path.dirname(__file__), 'README.rst'), 'r', 'utf8',
      File "/home/spinus/.virtualenvs/sphinx/lib/python2.7/codecs.py", line 878, in open
        file = __builtin__.open(filename, mode, buffering)
    IOError: [Errno 2] No such file or directory: '/home/spinus/.virtualenvs/sphinx/build/mergedict/README.rst'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/home/spinus/.virtualenvs/sphinx/build/mergedict/setup.py", line 10, in <module>

    os.path.join(os.path.dirname(__file__), 'README.rst'), 'r', 'utf8',

  File "/home/spinus/.virtualenvs/sphinx/lib/python2.7/codecs.py", line 878, in open

    file = __builtin__.open(filename, mode, buffering)

IOError: [Errno 2] No such file or directory: '/home/spinus/.virtualenvs/sphinx/build/mergedict/README.rst'

----------------------------------------
Cleaning up...

Circular dependency with configclass, doit and doit-py

Hi! Similar to what was discussed in schettino72/configclass#4 having doit and doit-py as test dependencies for mergedict means an even more complicated bootstrap for doit and doit-py.

Is it not possible to test mergedict without doit and doit-py?

does not merge nested arrays

import json
from mergedict import ConfigDict

ds1 = ConfigDict({
  'a': 1,
  'b': [1,2,3],
  'c': {
    'd': [3,4]
  }
})
ds1.merge({
  'a': 2,
  'b': [4,5,6],
  'c': {
    'd': [1,2]
  }
})
print(json.dumps(ds1, indent=2))

gives the output

{
  "a": 2,
  "c": {
    "d": [
      1,
      2
    ]
  },
  "b": [
    1,
    2,
    3,
    4,
    5,
    6
  ]
}

Outer array in merged. But the inner one (pointed by 'd') is overwritten - is this the expected behavior?