converting txt file to list unquoted using python

Question

i want to have this form

[(1, 'A'), (1, 'd'), (1, 'e'), (1, 'l'), (1, ' '), (1, 'a'), (1, 'n'), (1, 'd'), (1, ' '), (1, 'm'), (1, 'o'), (1, 'h'), (1, 'a'), (2, 'm'), (1, 'e'), (1, 'd')]

but i got this

["(1, 'A')", "(1, 'd')", "(1, 'e')", "(1, 'l')", "(1, ' ')", "(1, 'a')", "(1, 'n')", "(1, 'd')", "(1, ' ')", "(1, 'm')", "(1, 'o')", "(1, 'h')", "(1, 'a')", "(2, 'm')", "(1, 'e')", "(1, 'd')"]

and here is my code

def openRLEFile():
    file = askopenfile(parent=root,title='Select a File')
    global filename
    filename = file.name
    content = [x.strip('\n') for x in file]
    tDecompressed = decodeRLE(content)
    text.delete(0.0,END)
    text.insert(0.0,tDecompressed)
    file.close()

may be you should process your (sub) strings to transform them as you wish i.e. as tuples of int and character... What have you tried to do so? — Julien, Dec 11 '16 at 05:58
@JulienBernu i'm stuck here buddy and have no idea what to do to have that form of list — Mohammed Ehab Mohammed, Dec 11 '16 at 06:03
did you create this file? maybe you should do it in different way. — furas, Dec 11 '16 at 06:13
Try this on bash terminal if you are on linux: `sed -i 's/"//g' filename`. It will replace all the `"` with empty space in your file. — Mohammad Yusuf, Dec 11 '16 at 06:26

Julien · Accepted Answer · 2016-12-11T06:28:44.007

1

While eval() as proposed by 宏杰李 works conveniently, it is often not recommended to use it for security purpose.

Instead you could process manually:

def my_process(x):
    x = x[1:-1] # get rid of brackets
    x = x.split(", ")
    return (int(x[0]), x[1])

then use:

content = [my_process(x.strip('\n')) for x in file]

edited Dec 11 '16 at 06:28

answered Dec 11 '16 at 06:15

Julien

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宏杰李 · Answer 2 · 2016-12-11T06:35:20.103

-2

use eval to convert str to python tuple, like this:

eval("(1, ' ')")

out:

(1, ' ')

in you case:

content = [eval(x.strip('\n')) for x in file]

to make the code safety, recommend use ast.literal_eval

import ast
content = [ast.literal_eval(x.strip('\n')) for x in file]

edited Dec 11 '16 at 06:35

answered Dec 11 '16 at 06:03

宏杰李

11,820
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I would caution against doing `eval` on the contents of files and would recommend anyone dropping in here from the internet of the future takes a very serious look at whether or not they want to blindly execute whatever may be represented as code in a file. – erewok Dec 11 '16 at 06:17
@erewok sorry can you explain why it's dangerous ? – Mohammed Ehab Mohammed Dec 11 '16 at 06:20
the file could contain virus code, and `eval` will then execute it... – Julien Dec 11 '16 at 06:22
`eval` takes a string and evaluates it is as code. Your program is processing data from a file. If there is malicious code in the file, you would be would running it by running `eval` on it. – erewok Dec 11 '16 at 06:23

converting txt file to list unquoted using python

2 Answers2