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[FIX] Pip install failure due to relativepath not being fulfilled #2
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Copyright 2020 WorkAround Online Inc. | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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# JAC (JSON as CSV) Format | ||
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The JAC format makes it easy to convert to and from JSON and CSV file formats, while giving application developers a lot of flexibility to customize how easy it is to modify the CSV file for end users. Any JSON object can be represented as a JAC CSV. | ||
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`.jac.csv` files are always valid CSVs. | ||
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An example JAC file is shown below: | ||
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| path | . | name | dogs.0 | dogs.1 | | ||
| --------- | ---- | ----- | ---------- | -------- | | ||
| myName | John | | | | | ||
| friends.0 | | Stacy | Rufus | | | ||
| friends.1 | | Paul | Mr. Fluffs | Whimpers | | ||
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When this file is converted into JSON, it becomes: | ||
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```javascript | ||
{ | ||
"myName": "John", | ||
"friends": [ | ||
{ | ||
"name": "Stacy", | ||
"dogs": ["Rufus"] | ||
}, | ||
{ | ||
"name": "Paul", | ||
"dogs": ["Mr. Fluffs", "Whimpers"] | ||
} | ||
] | ||
} | ||
``` | ||
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## Usage with Javascript | ||
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`npm install jac-format` | ||
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```javascript | ||
const JAC = require("jac-format") | ||
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let csvString = JAC.toCSV( | ||
{ | ||
fruit: [{ name: "apple" }, { name: "lemon" }], | ||
}, | ||
{ | ||
rows: ["fruit.0", "fruit.1"], // optional | ||
columns: ["name"], // optional | ||
} | ||
) | ||
// "path,name\r\nfruit.0,apple\r\nfruit.1,lemon" | ||
// ┌───┬───────────┬─────────┐ | ||
// │ │ A │ B │ | ||
// ├───┼───────────┼─────────┤ | ||
// │ 1 │ 'path' │ 'name' │ | ||
// │ 2 │ 'fruit.0' │ 'apple' │ | ||
// │ 3 │ 'fruit.1' │ 'lemon' │ | ||
// └───┴───────────┴─────────┘ | ||
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// You can also use this | ||
JAC.toJSON(csvString) | ||
// > { "fruit": [{ "name": "apple" }, { "name": "lemon" }] } | ||
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// JAC.fromCSV === JAC.toJSON | ||
// JAC.fromJSON === JAC.toCSV | ||
``` | ||
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## Usage with Python | ||
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`pip install jac_format` | ||
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```python | ||
import jac_format as jac | ||
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csv_string = jac.to_csv( | ||
{ | ||
"fruit": [{ "name": "apple" }, { "name": "lemon" }], | ||
}, | ||
rows=["fruit.0", "fruit.1"], | ||
columns=["name"] | ||
) | ||
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# > csv_string | ||
# "path,name\r\nfruit.0,apple\r\nfruit.1,lemon" | ||
# ┌───┬───────────┬─────────┐ | ||
# │ │ A │ B │ | ||
# ├───┼───────────┼─────────┤ | ||
# │ 1 │ 'path' │ 'name' │ | ||
# │ 2 │ 'fruit.0' │ 'apple' │ | ||
# │ 3 │ 'fruit.1' │ 'lemon' │ | ||
# └───┴───────────┴─────────┘ | ||
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jac.to_json(csv_string) | ||
# { "fruit": [{ "name": "apple" }, { "name": "lemon" }] } | ||
``` | ||
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## Rules | ||
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- JAC CSV files are valid [RFC4180 CSVs](https://tools.ietf.org/html/rfc4180) | ||
- `jac_csv_path` or `path` is the first column, first cell | ||
- The first column contains the first path segment (except for the `jac_csv_path` cell) | ||
- The first row (header) contains the second path segment (except for the `jac_csv_path` cell) | ||
- Each value cell of a JAC CSV can be | ||
- 1. an empty cell | ||
- 2. a string | ||
- 3. a JSON object | ||
- 4. null | ||
- 5. a number | ||
- 7. a JSON array | ||
- Columns right of the "path" column are applied in order from left to right. Each row creates an object. This object is then set at the path of the first column. | ||
- A path can be traversed with either square bracket notation or dot notation | ||
- In dot notation, the usage of a number indicates the index of an array (`a["1"].0` is equivalent to `a["1"][0]`) | ||
- If an array has undefined values, those values are set to `null` | ||
- A value cell's path is constructed by taking the leftmost cell of of a row (in the path column) and appending the topmost header to it | ||
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## Automatic Indexing with "\*" | ||
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Automatic indexing makes it easier to add and delete rows because index numbers don't need to be adjusted. | ||
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These tables are equivalent when converted to JSON: | ||
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| path | . | name | dogs.\* | dogs.\* | | ||
| ---------- | ---- | ----- | ---------- | -------- | | ||
| myName | John | | | | | ||
| friends.\* | | Stacy | Rufus | | | ||
| friends.\* | | Paul | Mr. Fluffs | Whimpers | | ||
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| path | . | name | dogs.0 | dogs.1 | | ||
| --------- | ---- | ----- | ---------- | -------- | | ||
| myName | John | | | | | ||
| friends.0 | | Stacy | Rufus | | | ||
| friends.1 | | Paul | Mr. Fluffs | Whimpers | | ||
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If "\*" are replaced by the smallest index in the path segment that's not already taken. There are two appropriate syntaxes, "[\*]" or ".\*". For a row, only the path segments in the row are considered (i.e. the header is converted into indicies without any information from the `path` column). | ||
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You can also use the `*` to refer to the last object created matching the prefix preceding the star. The example below is equivalent to the two tables above. | ||
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| path | . | name | | ||
| ----------------- | ---------- | ----- | | ||
| myName | John | | | ||
| friends.\* | | Stacy | | ||
| friends.\*.dogs.0 | Rufus | | | ||
| friends.\* | | Paul | | ||
| friends.\*.dogs.0 | Mr. Fluffs | | | ||
| friends.\*.dogs.1 | Whimpers | | | ||
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## Pros & Cons | ||
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1. The flexibility of the JAC CSV format allows applications that output JAC CSV to give the user CSV data in a "flattening" that is most convenient for the application i.e. Columns can be created to make it easy for the user to modify the data. | ||
2. As a result of the flexibility in the JAC CSV format, one JSON file can have almost an infinite amount of CSV variations. | ||
3. Column order matters because it determines how the CSV is merged back into JSON |
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I like the
_here
variable, great convention!