remove f strings for python back compatibility (#906)

2019-05-31 14:27:11 -07:00
parent f7d5a265e1
commit 7614b02f7a
1 changed files with 1 additions and 1 deletions
--- a/baselines/common/mpi_adam_optimizer.py
+++ b/baselines/common/mpi_adam_optimizer.py
@@ -65,7 +65,7 @@ def check_synced(localval, comm=None):
    vals = comm.gather(localval)
    if comm.rank == 0:
        assert all(val==vals[0] for val in vals[1:]),\
-            f'MpiAdamOptimizer detected that different workers have different weights: {vals}'
+            'MpiAdamOptimizer detected that different workers have different weights: {}'.format(vals)

@with_mpi(timeout=5)
 def test_nonfreeze():