Issue with list of list in py yaml

Question

I have this yaml im trying to load into python with yaml.safe_load(file) and everytime im getting

yaml.parser.ParserError: while parsing a block mapping in "../fdlmyamls/testHolder/myfile.yaml", line 12, column 9 expected, but found '-' in "../fdlmyamls/testHolder/myfile.yaml", line 13, column 9

The file im trying to load is

myList:
  - Name: MyName
    Attributes:
      - Name: myInnerName
        - Context: some_context
          Description: ""
          Value:
            Trial:
              Description: some description
              ID: myId
              User: myUser
              Options:
                - Label: label1
                  Value: 1
                  Weight: 0.25
                - Label: label2
                  Value: 0
                  Weight: 0.75

but on the line starting with context im getting errors on the load. the pyyaml library returns this what i posted earlier, where as some other online validators gave me this:

A block sequence may not be used as an implicit map key at line 13, column 1 Implicit keys need to be on a single line at line 13, column 9 Implicit map keys need to be followed by map values at line 13, column 9

Answer 1

There are a lot of Syntax Errors in your yaml. I would suggest you to use JSON (.json files) instead, since it is easier to write and read manually but contains exactly the same data.

Import json like this: import json

You can load a json file to python like this:

filepath = 'myfile.json'
with open(filepath, 'r') as f:
    data = json.load(f)

You can save Json to a file like this:

filepath = 'myfile.json'
with open(filepath, 'w') as f:
    data = json.dump(f)

Python to Json datatypes:

Python -> JSON
dict      Object
list      Array
tuple     Array
str       String
int       Number
float     Number
True      true
False     false
None      null

More about Json:

Json docs ,

about the json Python library

actual json Python library docs