take mash dump format => signature file

mash-csv-to-sig.py

@@ -0,0 +1,42 @@
+#! /usr/bin/env python
+import argparse
+import csv
+import sourmash_lib
+from sourmash_lib import signature
+
+def main():
+    p = argparse.ArgumentParser()
+    p.add_argument('mash_csvfile')
+    args = p.parse_args()
+
+    with open(args.mash_csvfile, 'r') as fp:
+        reader = csv.reader(fp, delimiter=',')
+        for row in reader:
+            print(row[0])
+            hashfn = row[0]
+            hashseed = int(row[1])
+
+            assert hashfn == 'murmur64'
+            assert hashseed == 42
+
+            _, _, ksize, name, hashes = row
+            ksize = int(ksize)
+
+            hashes = hashes.strip()
+            hashes = list(map(int, hashes.split(' ' )))
+
+            e = sourmash_lib.Estimators(len(hashes), ksize)
+            for h in hashes:
+                e.mh.add_hash(h)
+            sig = signature.SourmashSignature('titus@idyll.org',
+                                              e, filename=name)
+            outfile = sig.md5sum()[:8] + '.sig'
+
+            print('wrote signature for %s to %s' % (name, outfile))
+            with open(outfile, 'wt') as outfp:
+                yaml = signature.save_signatures([sig])
+                outfp.write(yaml)
+
+
+if __name__ == '__main__':
+    main()