Filter Python list to remove similar values -

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so have list around 100 float values between 0 , 1 , like:

[0.642918256477056,  0.6429182558639024,  0.6429182466700671,  0.6429182068585415,  0.6429180997884363,  0.6428178743476422,  0.6428174651415239,  0.6428167927406518, ... ]

what need way create more simple list, values same during 4 decimals removed , keep first. example: number 0,6429... repeated several times in original list, need once.

after still need know values (indexes) removed can "remap" them. example:

len(original_list) # result: 100 | remap 0:1 range (index0 0, index 100 1) len(filterted_list) # result: 10

for example, if index 5 of filteres_list index 80 in original_list, need know original remapped value 0.8.

sorry if can't explain better, if me first part help. thank guys.

use set , round:

li=[0.642918256477056,  0.6429182558639024,  0.6429182466700671,  0.6429182068585415,  0.6429180997884363,  0.6428178743476422,  0.6428174651415239,  0.6428167927406518]  seen=set() data=[] n in li:     nr=round(n,4)     if nr not in seen:         seen.add(nr)         data.append(nr)   # append n if want unrounded value  print data  # [0.6429, 0.6428]

you can either append data either n (unrounded) or nr rounded value. order maintained.


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