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Use distcp to move concatenate multi-file CSV output to single file on S3
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| import os | |
| import sys | |
| import subprocess | |
| os.environ["SPARK_HOME"] = r"/usr/lib/spark" | |
| # Set PYTHONPATH for Spark | |
| for path in [r'/usr/lib/spark/python/', r'/usr/lib/spark/python/lib/py4j-src.zip']: | |
| sys.path.append(path) | |
| from pyspark import SparkContext | |
| from pyspark.sql import SQLContext | |
| from pyspark.sql.functions import udf | |
| from pyspark.sql.types import * | |
| sc = SparkContext() | |
| sqlContext = SQLContext(sc) | |
| def valueToCategory(value): | |
| if value == '2': return 'unconfirmed' | |
| elif value == '3': return 'confirmed' | |
| else: return '-9999' | |
| df = sqlContext.read.csv('output') | |
| # filter | |
| filtered = df.filter(df['_c3'] > 2015) | |
| # add stupid confidence_text | |
| # http://stackoverflow.com/a/37263999/4355916 | |
| udfValueToCategory = udf(valueToCategory, StringType()) | |
| df_with_cat = filtered.withColumn("category", udfValueToCategory("_c2")) | |
| # rename columns | |
| # oldColumns = df_with_cat.columns | |
| # newColumns = ['lon', 'lat', 'confidence', 'year', 'julian_day', 'area', 'emissions', 'climate_mask', 'iso', 'adm1', 'adm2', 'confidence_text'] | |
| # df_with_cat = reduce(lambda df_with_cat, idx: df_with_cat.withColumnRenamed(oldColumns[idx], newColumns[idx]), xrange(len(oldColumns)), df_with_cat) | |
| s3_temp_dir = r's3://gfw2-data/alerts-tsv/temp/output-glad2-all-20170509-2' | |
| df_with_cat.write.csv(s3_temp_dir) | |
| # s3_cmd = ['s3-dist-cp', '--src', r'hdfs:///processed/', '--dest', r's3://gfw2-data/alerts-tsv/temp/output-glad2-summary-v5/', '--groupBy', '".*(part-r*).*"'] | |
| s3_cmd = ['s3-dist-cp', '--src', s3_temp_dir, '--dest', 's3://gfw2-data/alerts-tsv/temp/output-glad2-summary-v9/', '--groupBy', '.*(part-r*).*'] | |
| subprocess.check_call(s3_cmd) | |
| remove_temp_cmd = ['aws', 's3', 'rm', s3_temp_dir, '--recursive'] | |
| subprocess.check_call(remove_temp_cmd) |
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