added get_list

snek

@@ -4,6 +4,7 @@ import argparse
 import json
 import shutil
 import subprocess
+from collections import defaultdict
 from datetime import datetime
 from pathlib import Path
 
@@ -114,6 +115,16 @@ class Conda:
         subprocess.run(cmd)
 
 
+    def get_list(self, env):
+        cmd = [self.exe, "list", "--json", "--name", env]
+        pkgs = run_and_parse(cmd)
+        res = defaultdict(list)
+        for p in pkgs:
+            for k in ("name", "version", "build_string", "build_number", "channel"):
+                res[k].append(p[k])
+        return dict(res)
+
+