doc/example/sysinfo: port to Python 3

Author: RonnyPfannschmidt

doc/example/sysinfo.py

@@ -6,7 +6,6 @@
 (c) Holger Krekel, MIT license
 """
 import optparse
-import pathlib
 import re
 import sys
 
@@ -34,12 +33,12 @@
 
 
 def parsehosts(path):
-    path = pathlib.Path(path)
+    host_regex = re.compile(r"Host\s*(\S+)")
     l = []
-    rex = re.compile(r"Host\s*(\S+)")
-    with path.open() as f:
-        for line in f:
-            m = rex.match(line)
+
+    with open(path) as fp:
+        for line in fp:
+            m = host_regex.match(line)
             if m is not None:
                 (sshname,) = m.groups()
                 l.append(sshname)
@@ -119,7 +118,7 @@ def getcpuinfo(self):
 
 
 def debug(*args):
-    print >> sys.stderr, " ".join(map(str, args))
+    print(" ".join(map(str, args)), file=sys.stderr)
 
 
 def error(*args):
@@ -140,7 +139,7 @@ def getinfo(sshname, ssh_config=None, loginfo=sys.stdout):
         ri = RemoteInfo(gw)
         # print "%s info:" % sshname
         prefix = sshname.upper() + " "
-        print >> loginfo, prefix, "fqdn:", ri.getfqdn()
+        print(prefix, "fqdn:", ri.getfqdn(), file=loginfo)
         for attr in ("sys.platform", "sys.version_info"):
             loginfo.write(f"{prefix} {attr}: ")
             loginfo.flush()
@@ -151,12 +150,12 @@ def getinfo(sshname, ssh_config=None, loginfo=sys.stdout):
         memswap = ri.getmemswap()
         if memswap:
             mem, swap = memswap
-            print >> loginfo, prefix, "Memory:", mem, "Swap:", swap
+            print(prefix, "Memory:", mem, "Swap:", swap, file=loginfo)
         cpuinfo = ri.getcpuinfo()
         if cpuinfo:
             numcpu, model = cpuinfo
-            print >> loginfo, prefix, "number of cpus:", numcpu
-            print >> loginfo, prefix, "cpu model", model
+            print(prefix, "number of cpus:", numcpu, file=loginfo)
+            print(prefix, "cpu model", model, file=loginfo)
         return ri