[SPARK-3361] Expand PEP 8 checks to include EC2 script and Python examples

This PR resolves [SPARK-3361](https://issues.apache.org/jira/browse/SPARK-3361) by expanding the PEP 8 checks to cover the remaining Python code base:
* The EC2 script
* All Python / PySpark examples

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #2297 from nchammas/pep8-rulez and squashes the following commits:

1e5ac9a [Nicholas Chammas] PEP 8 fixes to Python examples
c3dbeff [Nicholas Chammas] PEP 8 fixes to EC2 script
65ef6e8 [Nicholas Chammas] expand PEP 8 checks

1 files changed, 11 insertions, 6 deletions

diff --git a/examples/src/main/python/avro_inputformat.py b/examples/src/main/python/avro_inputformat.py
index e902ae2975..cfda8d8327 100644
--- a/examples/src/main/python/avro_inputformat.py
+++ b/examples/src/main/python/avro_inputformat.py
@@ -23,7 +23,8 @@ from pyspark import SparkContext
 Read data file users.avro in local Spark distro:
 
 $ cd $SPARK_HOME
-$ ./bin/spark-submit --driver-class-path /path/to/example/jar ./examples/src/main/python/avro_inputformat.py \
+$ ./bin/spark-submit --driver-class-path /path/to/example/jar \
+> ./examples/src/main/python/avro_inputformat.py \
 > examples/src/main/resources/users.avro
 {u'favorite_color': None, u'name': u'Alyssa', u'favorite_numbers': [3, 9, 15, 20]}
 {u'favorite_color': u'red', u'name': u'Ben', u'favorite_numbers': []}
@@ -40,7 +41,8 @@ $ cat examples/src/main/resources/user.avsc
  ]
 }
 
-$ ./bin/spark-submit --driver-class-path /path/to/example/jar ./examples/src/main/python/avro_inputformat.py \
+$ ./bin/spark-submit --driver-class-path /path/to/example/jar \
+> ./examples/src/main/python/avro_inputformat.py \
 > examples/src/main/resources/users.avro examples/src/main/resources/user.avsc
 {u'favorite_color': None, u'name': u'Alyssa'}
 {u'favorite_color': u'red', u'name': u'Ben'}
@@ -51,8 +53,10 @@ if __name__ == "__main__":
         Usage: avro_inputformat <data_file> [reader_schema_file]
 
         Run with example jar:
-        ./bin/spark-submit --driver-class-path /path/to/example/jar /path/to/examples/avro_inputformat.py <data_file> [reader_schema_file]
-        Assumes you have Avro data stored in <data_file>. Reader schema can be optionally specified in [reader_schema_file].
+        ./bin/spark-submit --driver-class-path /path/to/example/jar \
+        /path/to/examples/avro_inputformat.py <data_file> [reader_schema_file]
+        Assumes you have Avro data stored in <data_file>. Reader schema can be optionally specified
+        in [reader_schema_file].
         """
         exit(-1)
 
@@ -62,9 +66,10 @@ if __name__ == "__main__":
     conf = None
     if len(sys.argv) == 3:
         schema_rdd = sc.textFile(sys.argv[2], 1).collect()
-        conf = {"avro.schema.input.key" : reduce(lambda x, y: x+y, schema_rdd)}
+        conf = {"avro.schema.input.key": reduce(lambda x, y: x + y, schema_rdd)}
 
-    avro_rdd = sc.newAPIHadoopFile(path,
+    avro_rdd = sc.newAPIHadoopFile(
+        path,
         "org.apache.avro.mapreduce.AvroKeyInputFormat",
         "org.apache.avro.mapred.AvroKey",
         "org.apache.hadoop.io.NullWritable",