use pretty printed debug output

bench/client.py

@@ -4,6 +4,7 @@
 import logging
 import os
 from pathlib import Path
+import pprint as pp
 import subprocess
 from typing import Mapping, Sequence, Union
 
@@ -179,12 +180,14 @@ class Client(subprocess.Popen):
             assert host
             self.host = host
 
-        log.debug('Creating %s client: %s', host or 'local', {
-            'cmd': self.cmd,
-            'out': out_file,
-            'err': err_file,
-            'host': host
-        })
+        log.debug(
+            'Creating %s client:\n%s', host or 'local',
+            pp.pformat({
+                'cmd': self.cmd,
+                'out': out_file,
+                'err': err_file,
+                'host': host
+            }))
         self.fout = open(out_file, 'w')
         self.ferr = open(err_file, 'w')
 

bench/server.py

@@ -3,6 +3,7 @@
 
 import logging
 from pathlib import Path
+import pprint as pp
 import subprocess
 
 from .globalvars import KILL_CMD, TERMINATION_TIME
@@ -46,13 +47,14 @@ class Server(subprocess.Popen):
         err_file = bench_dir / SERVER_ERR.format(run=run)
 
         log.debug(
-            'Creating %s server: %s', name, {
+            'Creating %s server:\n%s', name,
+            pp.pformat({
                 'cmd': self.cmd,
                 'out': out_file,
                 'err': err_file,
                 'env': env,
                 'host': host or 'localhost'
-            })
+            }))
 
         self.fout = open(out_file, 'w')
         self.ferr = open(err_file, 'w')