Access global variable from UDF (User Defined Function) in python in spark

Question

I am trying to alter a global variable from inside a pyspark.sql.functions.udf function in python. But, the change in not getting reflected in the global variable.

The reproducible example along with outputs is:

counter = 0

schema2 = StructType([\
    StructField("id", IntegerType(), True),
    StructField("name", StringType(), True)   
])

data2 = [(1, "A"), (2, "B")]

df = spark.createDataFrame(data = data2, schema = schema2)

def myFunc(column):
    global counter
    counter = counter + 1
    return column + 5
  
myFuncUDF = udf(myFunc, IntegerType())

display(df.withColumn('id1', myFuncUDF(df.id)))

Output:

id	name	id1
1	A	6
2	B	7

When I print the counter variable, it remains 0.

Can anyone help me to know how to access a global variable inside a UDF and alter the global variable on each call to the UDF? or whether it is not possible?