diff --git a/Demo/scripts/fact.py b/Demo/scripts/fact.py
index 6aac414..b406086 100755
--- a/Demo/scripts/fact.py
+++ b/Demo/scripts/fact.py
@@ -12,17 +12,17 @@
 
 def fact(n):
 	if n < 1: raise error	# fact() argument should be >= 1
-	if n = 1: return []	# special case
+	if n == 1: return []	# special case
 	res = []
 	# Treat even factors special, so we can use i = i+2 later
-	while n%2 = 0:
+	while n%2 == 0:
 		res.append(2)
 		n = n/2
 	# Try odd numbers up to sqrt(n)
 	limit = sqrt(n+1)
 	i = 3
 	while i <= limit:
-		if n%i = 0:
+		if n%i == 0:
 			res.append(i)
 			n = n/i
 			limit = sqrt(n+1)
diff --git a/Demo/scripts/from.py b/Demo/scripts/from.py
index 21ca081..8e663f1 100755
--- a/Demo/scripts/from.py
+++ b/Demo/scripts/from.py
@@ -24,13 +24,13 @@
 while 1:
 	line = mail.readline()
 	if not line: break # EOF
-	if line[:5] = 'From ':
+	if line[:5] == 'From ':
 		# Start of message found
 		print line[:-1],
 		while 1:
 			line = mail.readline()
 			if not line: break # EOF
-			if line = '\n': break # Blank line ends headers
-			if line[:8] = 'Subject:':
+			if line == '\n': break # Blank line ends headers
+			if line[:8] == 'Subject:':
 				print `line[9:-1]`,
 		print
diff --git a/Demo/scripts/lpwatch.py b/Demo/scripts/lpwatch.py
index db0f469..afd46f3 100755
--- a/Demo/scripts/lpwatch.py
+++ b/Demo/scripts/lpwatch.py
@@ -23,7 +23,7 @@
 		# Strip '-P' from printer names just in case
 		# the user specified it...
 		for i in range(len(printers)):
-			if printers[i][:2] = '-P':
+			if printers[i][:2] == '-P':
 				printers[i] = printers[i][2:]
 	else:
 		if posix.environ.has_key('PRINTER'):
@@ -54,13 +54,13 @@
 		if not line: break
 		fields = string.split(line)
 		n = len(fields)
-		if len(fields) >= 6 and fields[n-1] = 'bytes':
+		if len(fields) >= 6 and fields[n-1] == 'bytes':
 			rank = fields[0]
 			user = fields[1]
 			job = fields[2]
 			files = fields[3:-2]
 			bytes = eval(fields[n-2])
-			if user = thisuser:
+			if user == thisuser:
 				userseen = 1
 			elif not userseen:
 				aheadbytes = aheadbytes + bytes
@@ -77,9 +77,9 @@
 		else:
 			if fields and fields[0] <> 'Rank':
 				line = string.strip(line)
-				if line = 'no entries':
+				if line == 'no entries':
 					line = name + ': idle'
-				elif line[-22:] = ' is ready and printing':
+				elif line[-22:] == ' is ready and printing':
 					line = name
 				lines.append(line)
 	#
@@ -87,12 +87,12 @@
 		line = `(totalbytes+1023)/1024` + ' K'
 		if totaljobs <> len(users):
 			line = line + ' (' + `totaljobs` + ' jobs)'
-		if len(users) = 1:
+		if len(users) == 1:
 			line = line + ' for ' + users.keys()[0]
 		else:
 			line = line + ' for ' + `len(users)` + ' users'
 			if userseen:
-				if aheadjobs = 0:
+				if aheadjobs == 0:
 				  line =  line + ' (' + thisuser + ' first)'
 				else:
 				  line = line + ' (' + `(aheadbytes+1023)/1024`
diff --git a/Demo/scripts/pi.py b/Demo/scripts/pi.py
index 5e19db6..74a66a7 100755
--- a/Demo/scripts/pi.py
+++ b/Demo/scripts/pi.py
@@ -19,7 +19,7 @@
 		# Print common digits
 		d, d1 = a/b, a1/b1
 		#print a, b, a1, b1
-		while d = d1:
+		while d == d1:
 			# Use write() to avoid spaces between the digits
 			sys.stdout.write(`int(d)`)
 			# Flush so the output is seen immediately
diff --git a/Demo/scripts/primes.py b/Demo/scripts/primes.py
index 487acef..6a36d6e 100755
--- a/Demo/scripts/primes.py
+++ b/Demo/scripts/primes.py
@@ -17,7 +17,7 @@
 	i = 3
 	while i <= max:
 		for p in primes:
-			if i%p = 0 or p*p > i: break
+			if i%p == 0 or p*p > i: break
 		if i%p <> 0:
 			primes.append(i)
 			if i >= min: print i