diff --git a/Lib/plat-os2emx/grp.py b/Lib/plat-os2emx/grp.py
index 2ac3ca6..8ac9b15 100644
--- a/Lib/plat-os2emx/grp.py
+++ b/Lib/plat-os2emx/grp.py
@@ -58,11 +58,11 @@
 
 # try and find the group file
 __group_path = []
-if os.environ.has_key('ETC_GROUP'):
+if 'ETC_GROUP' in os.environ:
     __group_path.append(os.environ['ETC_GROUP'])
-if os.environ.has_key('ETC'):
+if 'ETC' in os.environ:
     __group_path.append('%s/group' % os.environ['ETC'])
-if os.environ.has_key('PYTHONHOME'):
+if 'PYTHONHOME' in os.environ:
     __group_path.append('%s/Etc/group' % os.environ['PYTHONHOME'])
 
 group_file = None
@@ -149,9 +149,9 @@
             fields[2] = int(fields[2])
             fields[3] = [f.strip() for f in fields[3].split(',')]
             record = Group(*fields)
-            if not gidx.has_key(fields[2]):
+            if fields[2] not in gidx:
                 gidx[fields[2]] = record
-            if not namx.has_key(fields[0]):
+            if fields[0] not in namx:
                 namx[fields[0]] = record
         elif len(entry) > 0:
             pass                         # skip empty or malformed records
diff --git a/Lib/plat-os2emx/pwd.py b/Lib/plat-os2emx/pwd.py
index 4924c90..e1739bd 100644
--- a/Lib/plat-os2emx/pwd.py
+++ b/Lib/plat-os2emx/pwd.py
@@ -61,11 +61,11 @@
 
 # try and find the passwd file
 __passwd_path = []
-if os.environ.has_key('ETC_PASSWD'):
+if 'ETC_PASSWD' in os.environ:
     __passwd_path.append(os.environ['ETC_PASSWD'])
-if os.environ.has_key('ETC'):
+if 'ETC' in os.environ:
     __passwd_path.append('%s/passwd' % os.environ['ETC'])
-if os.environ.has_key('PYTHONHOME'):
+if 'PYTHONHOME' in os.environ:
     __passwd_path.append('%s/Etc/passwd' % os.environ['PYTHONHOME'])
 
 passwd_file = None
@@ -164,7 +164,7 @@
     uidx = {}
     namx = {}
     sep = None
-    while 1:
+    while True:
         entry = passwd.readline().strip()
         if len(entry) > 6:
             if sep == None:
@@ -175,9 +175,9 @@
             for i in (5, 6):
                 fields[i] = __field_sep[sep](fields[i])
             record = Passwd(*fields)
-            if not uidx.has_key(fields[2]):
+            if fields[2] not in uidx:
                 uidx[fields[2]] = record
-            if not namx.has_key(fields[0]):
+            if fields[0] not in namx:
                 namx[fields[0]] = record
         elif len(entry) > 0:
             pass                         # skip empty or malformed records