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-rwxr-xr-xextra/partition_dumps/partition_script.py42
1 files changed, 42 insertions, 0 deletions
diff --git a/extra/partition_dumps/partition_script.py b/extra/partition_dumps/partition_script.py
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+++ b/extra/partition_dumps/partition_script.py
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+#!/usr/bin/env python3
+"""
+Reads key-prefixed JSON lines from stdin, and writes out to gzipped files under
+./partitioned/.
+
+Skips empty keys and "null" (to handle a jq common-case).
+
+Eg, for tab-separated input:
+
+ something {"a": 1}
+ something2 {"b": 2}
+
+Will write to ./partitioned/something.json.gz:
+
+ {"a": 1}
+
+(and "b" object to ./partitioned/something2.json.gz)
+"""
+
+import os, sys, gzip
+
+def run():
+ last_prefix = None
+ f = None
+ os.makedirs('partitioned', exist_ok=True)
+
+ for line in sys.stdin:
+ (prefix, obj) = line.strip().split('\t')[:2]
+ if not prefix or prefix == "null":
+ continue
+ if prefix != last_prefix:
+ if f:
+ f.close()
+ f = gzip.GzipFile('partitioned/{}.json.gz'.format(prefix), 'a')
+ f.write(obj.encode('utf-8'))
+ f.write(b"\n")
+ last_prefix = prefix
+ if f:
+ f.close()
+
+if __name__=="__main__":
+ run()