python - How can I add the first line in a text file to following lines until a condition is met then repeat? -


i have form of data in text file.

ub25x

0060 4/22/16 -20.19

0060 3/17/15 -23.37

*ub25x

fj39y

0060 1/15/16 -27.34

0060 7/15/16 -23.10

*fj39y

i want print output:

ub25x 0060 4/22/16 -20.19

ub25x 0060 3/17/15 -23.37

fj39y 0060 1/15/16 -27.34

fj39y 0060 7/15/16 -23.10

you can use this:

input = '''ub25x 0060 4/22/16 -20.19 0060 3/17/15 -23.37 *ub25x fj39y 0060 1/15/16 -27.34 0060 7/15/16 -23.10 *fj39y'''  l = input.split('\n') tag = none out = []  item in l:     if tag == item.replace('*',''):         tag = none     elif tag:         out.append(tag + ' ' + item)     else:         tag = item  print out # ['ub25x 0060 4/22/16 -20.19', 'ub25x 0060 3/17/15 -23.37', 'fj39y 0060 1/15/16 -27.34', 'fj39y 0060 7/15/16 -23.10']

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