how to replace only the first word in regular expression in python

Question

i want to ask how we can replace only the first word in regular expression in python i do this code :

print "number of all KSU occurrences %i "%len(re.findall("ksu",string,re.IGNORECASE))
print "number of all KSU at end lof line %i"%len(re.findall("ksu\n",string,re.IGNORECASE))

and this is my txt file

hello i'm student in KSU i love ksu , i like ksu , i KSU ksu KSU

i just want to replace only first ksu ( ignoring case ) into King Saud University

So, how do you like KSU?

Tim Pietzcker
– Tim Pietzcker

2013-10-01 12:22:56 +00:00
Commented Oct 1, 2013 at 12:22 — Tim Pietzcker
– Tim Pietzcker, Commented Oct 1, 2013 at 12:22

Tim Pietzcker · Accepted Answer · 2013-10-01 12:21:35Z

1

re.sub() takes a count parameter:

re.sub(r"\bksu\b", "King Saud University", string, flags=re.I, count=1)

answered Oct 1, 2013 at 12:21

Tim Pietzcker

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