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For some background, I'm trying to create a tool that converts worksheets into API calls using Python 3.5
For the conversion of the table cells to the schema needed for the API call, I've started down the path of using javascript like syntax for the headers used in the spreadsheet. e.g:
Worksheet Header (string)
dict.list[0].id
Python Dictionary
{
"dict":
"list": [
{"id": "my cell value"}
]
}
It's also possible that the header schema could have nested arrays/dicts:
one.two[0].three[0].four.five[0].six
And I also need to append to the object after it has been created as I go through each header.
Based on https://stackoverflow.com/a/47276490/2903486 I am able to get nested dictionaries setup using values like one.two.three.four and I'm able to append to the existing dictionary as I go through the rows but I've been unable to add in support for arrays:
def add_branch(tree, vector, value):
key = vector[0]
tree[key] = value \
if len(vector) == 1 \
else add_branch(tree[key] if key in tree else {},
vector[1:],
value)
return tree
file = Worksheet(filePath, sheet).readRow()
rowList = []
for row in file:
rowObj = {}
for colName, rowValue in row.items():
rowObj.update(add_branch(rowObj, colName.split("."), rowValue))
rowList.append(rowObj)
return rowList
import re, json
def branch(tree, vector, value):
"""
Used to convert JS style notation (e.g dict.another.array[0].id) to a python object
Originally based on https://stackoverflow.com/a/47276490/2903486
"""
# Convert Boolean
if isinstance(value, str):
value = value.strip()
if value.lower() in ['true', 'false']:
value = True if value.lower() == "true" else False
# Convert JSON
try:
value = json.loads(value)
except:
pass
key = vector[0]
arr = re.search('\[([0-9]+)\]', key)
if arr:
arr = arr.group(0)
key = key.replace(arr, '')
arr = arr.replace('[', '').replace(']', '')
newArray = False
if key not in tree:
tree[key] = []
tree[key].append(value \
if len(vector) == 1 \
else branch({} if key in tree else {},
vector[1:],
value))
else:
isInArray = False
for x in tree[key]:
if x.get(vector[1:][0], False):
isInArray = x[vector[1:][0]]
if isInArray:
tree[key].append(value \
if len(vector) == 1 \
else branch({} if key in tree else {},
vector[1:],
value))
else:
tree[key].append(value \
if len(vector) == 1 \
else branch({} if key in tree else {},
vector[1:],
value))
if len(vector) == 1 and len(tree[key]) == 1:
tree[key] = value.split(",")
else:
tree[key] = value \
if len(vector) == 1 \
else branch(tree[key] if key in tree else {},
vector[1:],
value)
return tree
My branch solution works pretty well actually now after adding in some things but I'm wondering if I'm doing something wrong/messy here or if theres a better way to handle where I'm editing nested arrays (my attempt started in the if IsInArray section of the code)
I'd expect these two headers to edit the last array, but instead I end up creating a duplicate dictionary on the first array:
file = [{
"one.array[0].dict.arrOne[0]": "1,2,3",
"one.array[0].dict.arrTwo[0]": "4,5,6"
}]
rowList = []
for row in file:
rowObj = {}
for colName, rowValue in row.items():
rowObj.update(add_branch(rowObj, colName.split("."), rowValue))
rowList.append(rowObj)
return rowList
Outputs:
[
{
"one": {
"array": [
{
"dict": {
"arrOne": [
"1",
"2",
"3"
]
}
},
{
"dict": {
"arrTwo": [
"4",
"5",
"6"
]
}
}
]
}
}
]
Instead of:
[
{
"one": {
"array": [
{
"dict": {
"arrOne": [
"1",
"2",
"3"
],
"arrTwo": [
"4",
"5",
"6"
]
}
}
]
}
}
]
690
So I'm not sure if there are any caveats in this solution, but this appears to work for some of the use cases i'm throwing at it:
import json, re
def build_job():
def branch(tree, vector, value):
# Originally based on https://stackoverflow.com/a/47276490/2903486
# Convert Boolean
if isinstance(value, str):
value = value.strip()
if value.lower() in ['true', 'false']:
value = True if value.lower() == "true" else False
# Convert JSON
try:
value = json.loads(value)
except:
pass
key = vector[0]
arr = re.search('\[([0-9]+)\]', key)
if arr:
# Get the index of the array, and remove it from the key name
arr = arr.group(0)
key = key.replace(arr,'')
arr = int(arr.replace('[','').replace(']',''))
if key not in tree:
# If we dont have an array already, turn the dict from the previous
# recursion into an array and append to it
tree[key] = []
tree[key].append(value \
if len(vector) == 1 \
else branch({} if key in tree else {},
vector[1:],
value))
else:
# Check to see if we are inside of an existing array here
isInArray = False
for i in range(len(tree[key])):
if tree[key][i].get(vector[1:][0], False):
isInArray = tree[key][i][vector[1:][0]]
if isInArray and arr < len(tree[key]) \
and isinstance(tree[key][arr], list):
# Respond accordingly by appending or updating the value
tree[key][arr].append(value \
if len(vector) == 1 \
else branch(tree[key] if key in tree else {},
vector[1:],
value))
else:
# Make sure we have an index to attach the requested array to
while arr >= len(tree[key]):
tree[key].append({})
# update the existing array with a dict
tree[key][arr].update(value \
if len(vector) == 1 \
else branch(tree[key][arr] if key in tree else {},
vector[1:],
value))
# Turn comma deliminated values to lists
if len(vector) == 1 and len(tree[key]) == 1:
tree[key] = value.split(",")
else:
# Add dictionaries together
tree.update({key: value \
if len(vector) == 1 \
else branch(tree[key] if key in tree else {},
vector[1:],
value)})
return tree
file = [{
"one.array[0].dict.dont-worry-about-me": "some value",
"one.array[0].dict.arrOne[0]": "1,2,3",
"one.array[0].dict.arrTwo[1]": "4,5,6",
"one.array[1].x.y[0].z[0].id": "789"
}]
rowList = []
for row in file:
rowObj = {}
for colName, rowValue in row.items():
rowObj.update(branch(rowObj, colName.split("."), rowValue))
rowList.append(rowObj)
return rowList
print(json.dumps(build_job(), indent=4))
Result:
[
{
"one": {
"array": [
{
"dict": {
"dont-worry-about-me": "some value",
"arrOne": [
"1",
"2",
"3"
],
"arrTwo": [
"4",
"5",
"6"
]
}
},
{
"x": {
"y": [
{
"z": [
{
"id": 789
}
]
}
]
}
}
]
}
}
]
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