On Mar 19, 8:51 am, digz <digvijo...@gmail.com> wrote:
> Hi,
> I am trying to convert a | delimited file to fixed width by right
> padding with spaces, Here is how I have written the program , just get
> the feeling this can be done in a much better ( python functional )
> way rather than the procedural code i have below . Any help
> appreciated
>
> #!/usr/bin/python
> def rightFill(fillString, toLength, fillChar):
> return fillString+''.join([fillChar for x in range(len
> (fillString),toLength)])
>
> fieldWidth=[ 14, 6, 18, 21, 21,4, 6 ];
>
> file = open("/home/chatdi/input.csv", "r");
> lines = file.readlines()
> file.close()
>
> out = open( "/home/chatdi/ouptut.csv", 'w')
> for line in lines:
> line = line[:-1]
> index = 0
> for token in line.split('|'):
> paddedToken = rightFill(token, fieldWidth[index], ' ' )
> out.write( paddedToken )
> index = index + 1
> out.write("\n")
Caveat: none of the solutions (including mine) deal with the case of
the field being longer than the width. You might want to throw an
exception.
I use the csv module to do the reading of the file, i am going to do
some testing to see if i can set the delimiter to '' so that i can
also use it for the output. For now this should work.
http://docs.python.org/library/csv.html
import csv
fieldWidth=[ 14, 6, 18, 21, 21,4, 6 ];
csvfilepath = 'somefile.csv'
outcsvfilepath = 'someoutfile.csv'
endl = '\n'
f = open(csvfilepath)
outf = open(outcsvfilepath)
csvfile = csv.reader(f,delimiter = '|')
for row in csvfile:
outrow = [ field + fillchar * (width - len(field)) for width, field
in zip(fieldWidth,row)]
outcsv.write( ''.join(outrow))
outcsv.write( endl )
f.close()
outf.close()
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