Python:Write list value into the file

Question

Need help in the below code:

langs=['C','Java','Cobol','Python']

f1=open('a.txt','r')

f2=open('abc.txt','w')

for index in range(len(langs)):

    for line in f1:

        f2.write(line.replace('Frst languag','langs[index]'))

f1.close()

f2.close()

Line #4: Not sure if the syntax is correct, all i want is the loop to run for n number of times where n is no. of values inside the list.

Line 6: All I need is everytime the loop to run and each time langs[0] value #should be written to the file, then langs[1] value and so on...

your range(len(langs)) and referring to langs[index] is an anti-pattern in Python. Just use for lang in langs: — ngulam
– ngulam, Commented Sep 16, 2014 at 17:50

C.B. · Accepted Answer · 2014-09-16 17:39:15Z

1

f2.write(line.replace('Frst languag','{}'.format(langs[index]))

answered Sep 16, 2014 at 17:39

C.B.

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2 Comments

Matthias Over a year ago

'{}'.format(langs[index]) is the obfuscated version of langs[index].

C.B. Over a year ago

@Matthias very true. Didn't know if the OP had different intentions when specifically using string interpolation ('language {}'.format(...)

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