pyspark dataframe to json without header

[vijz]

My apologies for the similar question asked previously. This question is in Python. But I can't find correct solution I have the following dataframe df1

Output:
SomeJson  
[{ "Number": "1234", "Color": "blue", "size": "Medium" }, { "Number": "2222", "Color": "red", "size": "Small" } ] 

and I am trying to write just the contents of this dataframe as a json.

df0.coalesce(300).write.mode('append').json(<json_Path>)
It brings in the first key as well like:

{
        "SomeJson": [{
                "Number": "1234",
                "Color": "blue",
                "size": "Medium"
            }, {
                "Number": "2222",
                "Color": "red",
                "size": "Small"
            }
        ]
    }

but, I would not like to have { "SomeJson": } this in the output file. I have tried to write below. But, I am getting lost at writing the custom Python function to eliminate the first header. Any assistance is highly appreciated

df0.rdd.map(<custom_function>).saveAsTextFile(<json_Path>)

I had tried df0.rdd.map(lambda x: json.dumps(x["SomeJson"])).saveAsTextFile("filepath") but this gives only values but not keys in Square brackets..also, I would like to remove SomeJson from the output. Any help is much appreciated