Python text file searching for values and compiling results found -

i have large text file of lots of experimental results search through specific pieces of data, need compile. text file has results many different experiments, , need keep data each experiment together.

e.g. (not actual data)

object 1  colour of object blue. size of object 0.5 m^3 mass of object 0.8 g  object 2  colour of object pink. size of object 0.3m^3 etc. 

i know values want be, can search text specific phrase know present on line data on.

one way thought of doing search through file each specific line (i'm looking 2 different variables), , add value needed list. create dictionary each object, assuming @ same number in each list data same object.

e.g.

variable_one = [] variable_two = []  def get_data(file):     open("filename.txt", "r") file:         line in file:             if "the colour" in line:                 variable_one.append(line.split()[6])              if "the mass" in line:                 variable_two.append(line.split()[6])           file.close() 

or, search through file , create list, each entry being section of data different object, searching 2 variables each object within different items in list - again storing values each object in dictionary.

what want know if there more efficient/better method doing ideas had?

here alternative uses 1 list , uses less "append" , less "in" , should more effective.

variables = []  open('filename.txt') input:     colour = mass = ''     line in input:         fields = line.split()         if len(fields)>6:             value = fields[6]             if 'the colour' in line:                 colour = value             elif 'the mass' in line:                 mass = value         elif line.startswith('object'):             variables.append((colour, mass))             colour = mass = '' # may not needed. del(variables[0])