mapping-kit 0.1.0a5

Additional useful mappings

Description

Provides

• AttributeDict (keys accessible as dot-denoted attributes, remains subscriptable)

• GroupDict (groups keys based on prefix, makes it easy to write complex configuration in a single dictionary and access it easily)

• SuperDict (a dictionary that is defaultdict, OrderedDict, case-insensitive, and recursive,, each customizable by user)

Examples of AttributeDict:

from mapping_kit import AttributeDict

# All the standard ways that a Python dict can be created in, can be used to
# create AttributeDict. It can also be used as a normal dictionary.

my_dict = {
    "first_name": "Charlie",
    "last_name": "Brown",
}
from_dict = AttributeDict(**my_dict)
print("Hello", from_dict.first_name, from_dict["last_name"])
# Hello Charlie Brown

my_tuples = [("model", "Hindustan Ambassador"),
             ("production", "1957-2014")]
from_tuples = AttributeDict(my_tuples)
print(from_tuples.model, "was produced in the years", from_tuples["production"])
# Hindustan Ambassador was produced in the years 1957-2014

Examples of GroupDict:

from mapping_kit import GroupDict

my_dict = {
    "#Version": "1.4.9a1",
    "beverages": {
        "_lassi": "A yoghurt based beverage",
        "_aamras": "Thick mango pulp",
        "*jaljeera": "Spices mixed in water, out of stock",
        "*alcoholic_drinks": {
            "beer": "4-6% alcohol",
            "red_wine": "5.5-10% alcohol"
        },
    },
    "appetizers": {
        "_pani_puri": "Masala water filled crispy puffed bread",
        "!chicken_pakora": "Deep-fried chicken stuffing in Indian pakoras",
        "_aloo_chaat": "Potato with spicy gravy",
        "!prawn_toast": "Sesame and prawns rolled in bread"
    }
}

gd = GroupDict(my_dict,
               grouping={"#": "comment",  # arbitrary group names
                         "_": "vegetarian",
                         "!": "non_vegetarian",
                         "*": "not_available"},
               recursive=True,
               ignorecase_get=True)

# Accessing group `comment`
print("The version is", gd.comment["version"])
# The version is 1.4.9a1

for key, value in gd.comment.items():
    print("key:", key, ", value:", value)
# key: Version , value: 1.4.9a1

# Chained groups
veg_appetizers = gd.public["appetizers"].vegetarian
print("Vegetarian appetizers are:")
for key in veg_appetizers.keys():
    print(f"  {key}")
# Vegetarian appetizers are:
#   pani_puri
#   aloo_chaat

beverages_not_available = gd["beverages"].not_available
print("Beverages not available are:")
for bna, bna_desc in beverages_not_available.items():
    if isinstance(bna_desc, dict):
        for bna_sub, bna_sub_desc in bna_desc.public.items():
            print(f"  {bna_sub} ({bna_sub_desc})")
    else:
        print(f"  {bna} ({bna_desc})")
# Beverages not available are:
#   jaljeera (Spices mixed in water, out of stock)
#   beer (4-6% alcohol)
#   red_wine (5.5-10% alcohol)

Examples of SuperDict:

from mapping_kit import SuperDict

config = {
    "mode": "read",
    "max-size": 1024 * 1024,
    "type": "csv",
    "files": {
        "mode": "append",
        "file-1": {
            "mode": "write",
            "Name": "FromMumbai.pdf"
        },
        "file-2": {
            "max-size": 3 * 1024 * 1024,
            "Name": "FromTokyo.pdf",
            "worksheet": {
                "rates": "week-1"
            }
        }
    }
}

config_sd = SuperDict(config,
                      key_ignorecase=True,
                      # ordereddict=True,
                      # default_factory=list,
                      build_ancestry=True,
                      read_from_ancestry_incl=["mode", "max-size"],
                      read_from_ancestry_excl=["type"])
# ordereddict: makes order of keys important when comparing two SuperDicts
# default_factory: same usage as in collections.defaultdict

file_1 = config_sd["files"]["file-1"]
file_2 = config_sd["files"]["file-2"]
worksheet = file_2["worksheet"]

for k, v in file_2.items():
    print(f"file-2: {k}={v}")
# file-2: max-size=3145728
# file-2: name=FromTokyo.pdf              (`name` instead of `Name`)
# file-2: worksheet=SuperDict(...)        (recursive SuperDict)
# file-2: mode=append                     (inherited from nearest ancestry)

print(f"file-1: NAME={file_1["NAME"]}")
# file-1: NAME=FromMumbai.pdf             (case-insensitive key `NAME`)

print(f"file-1.parent: mode={file_1.parent["mode"]}")
# file-1.parent: mode=append              (access parent)

print(f"worksheet.parent.parent: mode={worksheet.parent.parent["mode"]}")
# worksheet.parent.parent: mode=append    (access parent hierarchy)

print(f"worksheet.root: mode={worksheet.root["mode"]}")
# worksheet.root: mode=read               (jump straight to root)

print(f"worksheet.root['files']: mode={worksheet.root["files"]["mode"]}")
# worksheet.root['files']: mode=append    (access keys within root)

Example of VirtualIterable:

from mapping_kit import VirtualIterable

for item in VirtualIterable(["a", "b"], None, 4, "c" (1, 2)):
    print(item)
# a
# b
# None
# 4
# c
# 1
# 2

Note: This is an alpha version, and things may change quite a bit.