Bala subramanian wrote:
Hello all,
query 1) How should i overwrite the input file
I want to open 5 files one by one, do some operation on the lines and
write the modified lines on the same file (overwritting). Can some
please tell me how to do it.
import fileinput
pat1=" R"
pat2="U5"
pat3="A3"
files = fileinput.Fileinput(sys.argv[1:], inplace = 1)
for i in files:
if pat1 in i: print i.replace(pat1," ")
if pat2 in i: print i.replace(pat2,"U ")
if pat3 in i: print i.replace(pat3,"A ")
files.close()
should work for you. Check out the fileinput documentation for details
especially the 'inplace' argument. It's untested though.
Personally speaking, I think the stdout redirection business violates
the 'explicit is better than implicit' rule.
query 2) How should I use wild cards to open files in python. Say I have
files with names *.dat in a directory, i want the program to open every
file with extension .dat and do the process.
import glob
glob.glob(r"*.dat")
should do that for you.
--
~noufal
http://nibrahim.net.in/
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