diff --git a/Demo/sockets/finger.py b/Demo/sockets/finger.py
index 8aa0535..01c0b6c 100755
--- a/Demo/sockets/finger.py
+++ b/Demo/sockets/finger.py
@@ -37,7 +37,7 @@
 def main():
 	options = ''
 	i = 1
-	while i < len(sys.argv) and sys.argv[i][:1] = '-':
+	while i < len(sys.argv) and sys.argv[i][:1] == '-':
 		options = options + sys.argv[i] + ' '
 		i = i+1
 	args = sys.argv[i:]
diff --git a/Demo/sockets/telnet.py b/Demo/sockets/telnet.py
index 60f832a..20d14c3 100755
--- a/Demo/sockets/telnet.py
+++ b/Demo/sockets/telnet.py
@@ -58,7 +58,7 @@
 	#
 	pid = posix.fork()
 	#
-	if pid = 0:
+	if pid == 0:
 		# child -- read stdin, write socket
 		while 1:
 			line = sys.stdin.readline()
@@ -82,19 +82,19 @@
 					opt = ''
 				elif iac:
 					iac = 0
-					if c = IAC:
+					if c == IAC:
 						cleandata = cleandata + c
 					elif c in (DO, DONT):
-						if c = DO: print '(DO)',
+						if c == DO: print '(DO)',
 						else: print '(DONT)',
 						opt = IAC + WONT
 					elif c in (WILL, WONT):
-						if c = WILL: print '(WILL)',
+						if c == WILL: print '(WILL)',
 						else: print '(WONT)',
 						opt = IAC + DONT
 					else:
 						print '(command)', ord(c)
-				elif c = IAC:
+				elif c == IAC:
 					iac = 1
 					print '(IAC)',
 				else:
diff --git a/Demo/sockets/throughput.py b/Demo/sockets/throughput.py
index 411af9f..6ffcaa8 100755
--- a/Demo/sockets/throughput.py
+++ b/Demo/sockets/throughput.py
@@ -23,9 +23,9 @@
 def main():
 	if len(sys.argv) < 2:
 		usage()
-	if sys.argv[1] = '-s':
+	if sys.argv[1] == '-s':
 		server()
-	elif sys.argv[1] = '-c':
+	elif sys.argv[1] == '-c':
 		client()
 	else:
 		usage()
diff --git a/Demo/sockets/udpecho.py b/Demo/sockets/udpecho.py
index 53dff64..0e1efc7 100755
--- a/Demo/sockets/udpecho.py
+++ b/Demo/sockets/udpecho.py
@@ -14,9 +14,9 @@
 def main():
 	if len(sys.argv) < 2:
 		usage()
-	if sys.argv[1] = '-s':
+	if sys.argv[1] == '-s':
 		server()
-	elif sys.argv[1] = '-c':
+	elif sys.argv[1] == '-c':
 		client()
 	else:
 		usage()