propertybag 0.1.4

Flexible property bag functions

propertybag

Flexible property bag class

    import propertybag as pb

    bag = pb.Bag({'a':'b'}, c='d')
    print(bag)                      # > {"a": "b", "c": "d"}

    bag.b.c.d.e = 42
    print(bag.b.c.d.e)              # > 42
    print(bag.toJson())             # > {"a": "b", "c": "d", "b": {"c": {"d": {"e": 42}}}}

    # Returns a dict
    bag.b.c['d']

    # Returns a Bag() object
    bag.b.c.d

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Table of contents

• Install
• Examples
• References

 

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Install

$ pip3 install propertybag

 

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Examples

    import propertybag as pb

    Log = print

    # Init with kw args
    bag = pb.Bag(a='b', c='d')
    Log(bag.toJson(True))                   # > {
                                            # >   "a": "b",
                                            # >   "c": "d"
                                            # > }

    # Init with dict
    bag = pb.Bag({'a':'b', 'c':'d'})
    Log(bag.toJson())                       # > {"a": "b", "c": "d"}

    # Init with both
    bag = pb.Bag({'a':'b'}, c='d')
    Log(bag)                                # > {"a": "b", "c": "d"}

    # Set deep value
    bag.d.e.f.g.h = 42
    Log(bag)                                # > {"a": "b", "c": "d", "d": {"e": {"f": {"g": {"h": 42}}}}}

    # Read deep value
    Log(bag.d.e.f.g.h)                      # > 42
    try:
        Log(bag.d.e.f.g.i)                  # > Throws ValueError() exception
    except ValueError as e:
        Log(e)                              # > Value not set

    # If you don't want exceptions thrown when value doesn't exist, provide a default
    bag_nt = pb.Bag({'a': 'b'}, '')
    Log(bag_nt.d.e.f.g.i)                   # > ''

    # Use get/set for compound keys
    bag.set("d.e.f.g.h", 43)
    Log(bag.get("d.e.f.g.h"))               # > 43
    Log(bag.get("d.e.f.g.i", "default"))    # > "default"

    # Iterate
    Log('--------------------------------------------')
    for k,v in bag.items():
        Log(k, v)

    Log('--------------------------------------------')
    for k in bag:
        Log(k)

    Log('--------------------------------------------')
    for v in bag.values():
        Log(v)

 

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References

• Python

  • https://www.python.org/

• pip

  • https://pip.pypa.io/en/stable/