tasks: add missing import

1 files changed, 3 insertions, 4 deletions

diff --git a/python/refcat/techreport.py b/python/refcat/techreport.py
index 064e357..e23e151 100644
--- a/python/refcat/techreport.py
+++ b/python/refcat/techreport.py
@@ -1,8 +1,7 @@
-
 """
 Tasks for techreport.
 """
-
+import luigi
 from refcat.tasks import Refcat, OpenCitations
 from refcat.base import shellout, Zstd
 
@@ -11,7 +10,6 @@ class COCIDOIOnly(Refcat):
     """
     Extract DOI-DOI pair, order dois lexicographically.
     """
-
     def requires(self):
         return OpenCitations()
 
@@ -23,7 +21,8 @@ class COCIDOIOnly(Refcat):
                           cut -d , -f2,3 |
                           perl -F, -lane 'printf qq[%s\n], join ",", sort @F' |
                           zstd -c -T0 > {output}
-                          """, input=self.input().path)
+                          """,
+                          input=self.input().path)
         luigi.LocalTarget(output).move(self.output().path)
 
     def output(self):