[Autoscaler] Fix resource passing bug fix (#10397)

python/ray/autoscaler/command_runner.py

@@ -8,6 +8,7 @@ import os
 import subprocess
 import sys
 import time
+import json
 
 from ray.autoscaler.docker import check_docker_running_cmd, \
                                   check_docker_image, \
@@ -81,18 +82,9 @@ def _with_environment_variables(cmd: str,
             automatically be converted to a one line yaml string.
     """
 
-    def dict_as_one_line_yaml(d):
-        items = []
-        for key, val in d.items():
-            item_str = "{}: {}".format(quote(str(key)), quote(str(val)))
-            items.append(item_str)
-
-        return "{" + ",".join(items) + "}"
-
     as_strings = []
     for key, val in environment_variables.items():
-        if isinstance(val, dict):
-            val = dict_as_one_line_yaml(val)
+        val = json.dumps(val, separators=(",", ":"))
         s = "export {}={};".format(key, quote(val))
         as_strings.append(s)
     all_vars = "".join(as_strings)
@@ -102,7 +94,6 @@ def _with_environment_variables(cmd: str,
 def _with_interactive(cmd):
     force_interactive = ("true && source ~/.bashrc && "
                          "export OMP_NUM_THREADS=1 PYTHONWARNINGS=ignore && ")
-
     return ["bash", "--login", "-c", "-i", quote(force_interactive + cmd)]