Databricks - explode JSON from SQL column with PySpark - json

Question

New to Databricks. Have a SQL database table that I am creating a dataframe from. One of the columns is a JSON string. I need to explode the nested JSON into multiple columns. Have used this post and this post to get me to where I am at now.
Example JSON:
{
"Module": {
"PCBA Serial Number": "G7456789",
"Manufacturing Designator": "DISNEY",
"Firmware Version": "0.0.0",
"Hardware Revision": "46858",
"Manufacturing Date": "10/17/2018 4:04:25 PM",
"Test Result": "Fail",
"Test Start Time": "10/22/2018 6:14:14 AM",
"Test End Time": "10/22/2018 6:16:11 AM"
}
Code so far:
#define schema
schema = StructType(
[
StructField('Module',ArrayType(StructType(Seq
StructField('PCBA Serial Number',StringType,True),
StructField('Manufacturing Designator',StringType,True),
StructField('Firmware Version',StringType,True),
StructField('Hardware Revision',StringType,True),
StructField('Test Result',StringType,True),
StructField('Test Start Time',StringType,True),
StructField('Test End Time',StringType,True))), True) ,True),
StructField('Test Results',StringType(),True),
StructField('HVM Code Errors',StringType(),True)
]
#use from_json to explode json by applying it to column
df.withColumn("ActivityName", from_json("ActivityName", schema))\
.select(col('ActivityName'))\
.show()
Error:
SyntaxError: invalid syntax
File "<command-1632344621139040>", line 10
StructField('PCBA Serial Number',StringType,True),
^
SyntaxError: invalid syntax

Answer 1

As you are using pyspark then types should be StringType() instead of StringType and remove Seq replace it with []
schema = StructType([StructField('Module',ArrayType(StructType([
StructField('PCBA Serial Number',StringType(),True),
StructField('Manufacturing Designator',StringType(),True),
StructField('Firmware Version',StringType(),True),
StructField('Hardware Revision',StringType(),True),
StructField('Test Result',StringType(),True),
StructField('Test Start Time',StringType(),True),
StructField('Test End Time',StringType(),True)])), True),
StructField('Test Results',StringType(),True),
StructField('HVM Code Errors',StringType(),True)])