DAT file in python

Question

I have a problem with .dat files in Python: I can not encode it. I have tried UTF-8, ASCII and many more.

import re

with open("mixture1.dat",'r', encoding="ascii", errors="surrogateescape") as f:
    lines = f.readlines()
    text = "".join(lines)

print(text)

Here is the link for the "mixture1.dat". There should be something related in chemistry but I could not open it for a week. How should I do it?

EDIT: SOLUTION

import pickle

def read_file(filename):
    with open(filename,  'rb')  as  FID:
        mp  = pickle.Unpickler(FID)
        data = mp.load()
    return data

Worked fine

Opening a binary file like that has no chance of success. strings says "numpy.core.multiarray". Check out stackoverflow.com/questions/20518632/… — user9706
– user9706, Commented Jan 1, 2021 at 7:55
What should i do then? I should open it and it corresponds to a mixture of two molecules — Samadzade Muhammed
– Samadzade Muhammed, Commented Jan 1, 2021 at 8:03

PApostol · Accepted Answer · 2021-01-01 08:11:08Z

1

You can use numpy for this:

import numpy as np
data = np.fromfile('mixture1.dat', dtype=float)

print(data.size)
print(data[:20])

Output:

23767
[ 5.43235748e-312  7.01653493e-205  3.63521590e+228  9.77081644e+199
  4.03065734e-277 -2.37251204e-214  9.10016855e+276  4.27255706e+180
 -2.89898361e-211 -8.83065826e-211  3.49131717e+070  1.91561942e+053
 -3.80240360e-210  2.67555322e-318 -8.83065517e-211 -5.81601764e+181
 -5.71181552e-277  8.93904783e+014  3.37067979e-234  3.07882662e-292]

edited Jan 1, 2021 at 8:11

answered Jan 1, 2021 at 8:05

PApostol

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4 Comments

Samadzade Muhammed Over a year ago

What is the meaning of these numbers? Is it a header or the numbers in the file itself? Cause it was given that data is given in a binary file with 10001 values corresponding to the normalized fluorescence signal measured for 1 µs with a time step of 100 ps.

PApostol Over a year ago

My understanding from the docs is that the numbers are the data in the file itself.

Samadzade Muhammed Over a year ago

I have multiple that kind of file. Numbers in the even indexes are the same [ 1.10687736e+193 -3.04853105e+012 -8.83065517e-211 7.82932173e+185 -5.71172958e-277 8.93904783e+014 -1.21750579e+288 3.07882662e-292 3.90254972e+267 6.53306071e+089] [ 1.10687736e+193 -7.26428739e+192 -8.83065517e-211 3.21748662e+272 -5.71171472e-277 8.93904783e+014 -2.18020972e+271 3.07882662e-292 -1.42643138e-238 6.53306071e+089]

pepoluan Over a year ago

@SamadzadeMuhammed you should ask the meaning of the numbers to the people who created your .dat files. We can only help you decode the file, but we cannot tell you its meaning.

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