string - Modifying data in a column Python -

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hi guys have column this,

 start  start = 11122001  start = 12012014  start = 23122001

and want remove "start =" , date format 

 start  11/12/2001  12/01/2014  23/12/2001

how do properly?

it depends on trying do.

if want remove start = each line:

lines = [ format_date(re.sub("^start =", '', line)) line in lines ]

(presuming have text line line in list).

to format date need implement function format_date convert dates 11122001 11/12/2001.

there several ways how depending on input format. 1 of solutions:

def format_date(x):   if re.match(x, '[0-9]{8}'):     return "/".join([x[:2], x[2:4], x[4:]])   else:     return x

you check first if line match date expression (looks date), , if does, rewrite it. otherwise return is.

of course, can combine solution in 1 line , don't use function @ all, in case not clear.

another, map-based solution:

def format_line(x):   x = re.sub("^start =", '', line)   if re.match(x, '[0-9]{8}'):     return "/".join([x[:2], x[2:4], x[4:]])   else:     return x  map(format_line, lines)

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