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How to turn text file into python list form
How can I check the version of sed in OS X?How do I check if a list is empty?How do I check whether a file exists without exceptions?Finding the index of an item given a list containing it in PythonWhat is the difference between Python's list methods append and extend?Getting the last element of a list in PythonHow to make a flat list out of list of listsHow do I get the number of elements in a list in Python?How do I concatenate two lists in Python?How to clone or copy a list?How do I list all files of a directory?
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I'm trying to turn a list of numbers in a text file into python list form. For example, I want to make
1
2
3
4
5
into
[1,2,3,4,5]
I found something that almost worked in another post using sed.
sed '1s/^/[/;$!s/$/,/;$s/$/]/' file
but this didn't remove the new line after every number. How can I modify this sed command to get it to do what I want. Also, an explanation on the components of the sed command would also be appreciated. Thanks
python list sed
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
|
show 1 more comment
I'm trying to turn a list of numbers in a text file into python list form. For example, I want to make
1
2
3
4
5
into
[1,2,3,4,5]
I found something that almost worked in another post using sed.
sed '1s/^/[/;$!s/$/,/;$s/$/]/' file
but this didn't remove the new line after every number. How can I modify this sed command to get it to do what I want. Also, an explanation on the components of the sed command would also be appreciated. Thanks
python list sed
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
with open('file') as f:..data = f.read().strip().split();..nums = map(int, data)? Why are you usingsedhere ?
– han solo
Mar 23 at 15:18
8
Are you wanting to do this in Python or is this primarily a question onsedand you're just referencing Python because of the format? If the later - you don't need anything except thesedtag... and if the former - you'd don't need thesedtag... Please considering making an edit to your post to clarify that - thanks.
– Jon Clements♦
Mar 23 at 15:21
Just in case you need it for some out of python operationawk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file
– PS.
Mar 23 at 15:31
Append| tr -d 'n'?
– Cyrus
Mar 23 at 15:56
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00
|
show 1 more comment
I'm trying to turn a list of numbers in a text file into python list form. For example, I want to make
1
2
3
4
5
into
[1,2,3,4,5]
I found something that almost worked in another post using sed.
sed '1s/^/[/;$!s/$/,/;$s/$/]/' file
but this didn't remove the new line after every number. How can I modify this sed command to get it to do what I want. Also, an explanation on the components of the sed command would also be appreciated. Thanks
python list sed
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
I'm trying to turn a list of numbers in a text file into python list form. For example, I want to make
1
2
3
4
5
into
[1,2,3,4,5]
I found something that almost worked in another post using sed.
sed '1s/^/[/;$!s/$/,/;$s/$/]/' file
but this didn't remove the new line after every number. How can I modify this sed command to get it to do what I want. Also, an explanation on the components of the sed command would also be appreciated. Thanks
python list sed
python list sed
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
asked Mar 23 at 15:17
Joshua SegalJoshua Segal
62
62
with open('file') as f:..data = f.read().strip().split();..nums = map(int, data)? Why are you usingsedhere ?
– han solo
Mar 23 at 15:18
8
Are you wanting to do this in Python or is this primarily a question onsedand you're just referencing Python because of the format? If the later - you don't need anything except thesedtag... and if the former - you'd don't need thesedtag... Please considering making an edit to your post to clarify that - thanks.
– Jon Clements♦
Mar 23 at 15:21
Just in case you need it for some out of python operationawk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file
– PS.
Mar 23 at 15:31
Append| tr -d 'n'?
– Cyrus
Mar 23 at 15:56
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00
|
show 1 more comment
with open('file') as f:..data = f.read().strip().split();..nums = map(int, data)? Why are you usingsedhere ?
– han solo
Mar 23 at 15:18
8
Are you wanting to do this in Python or is this primarily a question onsedand you're just referencing Python because of the format? If the later - you don't need anything except thesedtag... and if the former - you'd don't need thesedtag... Please considering making an edit to your post to clarify that - thanks.
– Jon Clements♦
Mar 23 at 15:21
Just in case you need it for some out of python operationawk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file
– PS.
Mar 23 at 15:31
Append| tr -d 'n'?
– Cyrus
Mar 23 at 15:56
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00
with open('file') as f:..data = f.read().strip().split();..nums = map(int, data) ? Why are you using sed here ?– han solo
Mar 23 at 15:18
with open('file') as f:..data = f.read().strip().split();..nums = map(int, data) ? Why are you using sed here ?– han solo
Mar 23 at 15:18
8
8
Are you wanting to do this in Python or is this primarily a question on
sed and you're just referencing Python because of the format? If the later - you don't need anything except the sed tag... and if the former - you'd don't need the sed tag... Please considering making an edit to your post to clarify that - thanks.– Jon Clements♦
Mar 23 at 15:21
Are you wanting to do this in Python or is this primarily a question on
sed and you're just referencing Python because of the format? If the later - you don't need anything except the sed tag... and if the former - you'd don't need the sed tag... Please considering making an edit to your post to clarify that - thanks.– Jon Clements♦
Mar 23 at 15:21
Just in case you need it for some out of python operation
awk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file– PS.
Mar 23 at 15:31
Just in case you need it for some out of python operation
awk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file– PS.
Mar 23 at 15:31
Append
| tr -d 'n'?– Cyrus
Mar 23 at 15:56
Append
| tr -d 'n'?– Cyrus
Mar 23 at 15:56
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00
|
show 1 more comment
4 Answers
4
active
oldest
votes
With GNU sed for -z to read the whole file at once:
sed -z 's/n/,/g; s/^/[/; s/,$/]n/' file
[1,2,3,4,5]
With any awk in any shell on any UNIX box:
$ awk 'printf "%s%s", (NR>1 ? "," : "["), $0 ENDprint "]"' file
[1,2,3,4,5]
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
add a comment |
You can append all the lines into the pattern space first before performing substitutions:
sed ':a;N;$!ba;s/n/,/g;s/^/[/;s/$/]/' file
This outputs:
[1,2,3,4,5]
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
add a comment |
This might work for you (GNU sed):
sed '1h;1!H;$!d;x;s/n/,/g;s/.*/[&]/' file
Copy the first line to the hold space, append copies of subsequent lines and delete the originals. At the end of the file, swap to the hold space, replace newlines by commas, and surround the remaining string by square brackets.
answered Mar 24 at 9:48
potongpotong
37.2k43063
add a comment |
If you want the list using python, a simple implementation is
with open('./num.txt') as f:
num = [int(line) for line in f]
answered Mar 23 at 15:26
MerigMerig
830410
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
With GNU sed for -z to read the whole file at once:
sed -z 's/n/,/g; s/^/[/; s/,$/]n/' file
[1,2,3,4,5]
With any awk in any shell on any UNIX box:
$ awk 'printf "%s%s", (NR>1 ? "," : "["), $0 ENDprint "]"' file
[1,2,3,4,5]
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
add a comment |
With GNU sed for -z to read the whole file at once:
sed -z 's/n/,/g; s/^/[/; s/,$/]n/' file
[1,2,3,4,5]
With any awk in any shell on any UNIX box:
$ awk 'printf "%s%s", (NR>1 ? "," : "["), $0 ENDprint "]"' file
[1,2,3,4,5]
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
add a comment |
With GNU sed for -z to read the whole file at once:
sed -z 's/n/,/g; s/^/[/; s/,$/]n/' file
[1,2,3,4,5]
With any awk in any shell on any UNIX box:
$ awk 'printf "%s%s", (NR>1 ? "," : "["), $0 ENDprint "]"' file
[1,2,3,4,5]
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
With GNU sed for -z to read the whole file at once:
sed -z 's/n/,/g; s/^/[/; s/,$/]n/' file
[1,2,3,4,5]
With any awk in any shell on any UNIX box:
$ awk 'printf "%s%s", (NR>1 ? "," : "["), $0 ENDprint "]"' file
[1,2,3,4,5]
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
answered Mar 24 at 13:50
Ed MortonEd Morton
118k1345105
118k1345105
add a comment |
add a comment |
You can append all the lines into the pattern space first before performing substitutions:
sed ':a;N;$!ba;s/n/,/g;s/^/[/;s/$/]/' file
This outputs:
[1,2,3,4,5]
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
add a comment |
You can append all the lines into the pattern space first before performing substitutions:
sed ':a;N;$!ba;s/n/,/g;s/^/[/;s/$/]/' file
This outputs:
[1,2,3,4,5]
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
add a comment |
You can append all the lines into the pattern space first before performing substitutions:
sed ':a;N;$!ba;s/n/,/g;s/^/[/;s/$/]/' file
This outputs:
[1,2,3,4,5]
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
You can append all the lines into the pattern space first before performing substitutions:
sed ':a;N;$!ba;s/n/,/g;s/^/[/;s/$/]/' file
This outputs:
[1,2,3,4,5]
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
answered Mar 23 at 15:37
blhsingblhsing
46.8k51747
46.8k51747
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
add a comment |
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
when I do seq 5 | sed -z 's/^/[/; s/n/,/g; s/,?$/]n/' it seems to not even change the output. It's identical to seq 5
– Joshua Segal
Mar 23 at 20:28
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
That isn't my code (that is oguzismail's code). Please run the demo here: tio.run/##K05N0U3PK/3/3yrR2s9aRTEp0bpYPyZPX0c/…
– blhsing
Mar 24 at 2:53
add a comment |
This might work for you (GNU sed):
sed '1h;1!H;$!d;x;s/n/,/g;s/.*/[&]/' file
Copy the first line to the hold space, append copies of subsequent lines and delete the originals. At the end of the file, swap to the hold space, replace newlines by commas, and surround the remaining string by square brackets.
answered Mar 24 at 9:48
potongpotong
37.2k43063
add a comment |
This might work for you (GNU sed):
sed '1h;1!H;$!d;x;s/n/,/g;s/.*/[&]/' file
Copy the first line to the hold space, append copies of subsequent lines and delete the originals. At the end of the file, swap to the hold space, replace newlines by commas, and surround the remaining string by square brackets.
answered Mar 24 at 9:48
potongpotong
37.2k43063
add a comment |
This might work for you (GNU sed):
sed '1h;1!H;$!d;x;s/n/,/g;s/.*/[&]/' file
Copy the first line to the hold space, append copies of subsequent lines and delete the originals. At the end of the file, swap to the hold space, replace newlines by commas, and surround the remaining string by square brackets.
answered Mar 24 at 9:48
potongpotong
37.2k43063
This might work for you (GNU sed):
sed '1h;1!H;$!d;x;s/n/,/g;s/.*/[&]/' file
Copy the first line to the hold space, append copies of subsequent lines and delete the originals. At the end of the file, swap to the hold space, replace newlines by commas, and surround the remaining string by square brackets.
answered Mar 24 at 9:48
potongpotong
37.2k43063
answered Mar 24 at 9:48
potongpotong
37.2k43063
answered Mar 24 at 9:48
potongpotong
37.2k43063
answered Mar 24 at 9:48
potongpotong
37.2k43063
37.2k43063
add a comment |
add a comment |
If you want the list using python, a simple implementation is
with open('./num.txt') as f:
num = [int(line) for line in f]
answered Mar 23 at 15:26
MerigMerig
830410
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
add a comment |
If you want the list using python, a simple implementation is
with open('./num.txt') as f:
num = [int(line) for line in f]
answered Mar 23 at 15:26
MerigMerig
830410
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
add a comment |
If you want the list using python, a simple implementation is
with open('./num.txt') as f:
num = [int(line) for line in f]
answered Mar 23 at 15:26
MerigMerig
830410
If you want the list using python, a simple implementation is
with open('./num.txt') as f:
num = [int(line) for line in f]
answered Mar 23 at 15:26
MerigMerig
830410
answered Mar 23 at 15:26
MerigMerig
830410
answered Mar 23 at 15:26
MerigMerig
830410
answered Mar 23 at 15:26
MerigMerig
830410
830410
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
add a comment |
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
Thanks. I probably should have added that this is supposed to be more of a sed exercise, but thanks for the code snippet
– Joshua Segal
Mar 23 at 20:16
add a comment |
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with open('file') as f:..data = f.read().strip().split();..nums = map(int, data)? Why are you usingsedhere ?– han solo
Mar 23 at 15:18
8
Are you wanting to do this in Python or is this primarily a question on
sedand you're just referencing Python because of the format? If the later - you don't need anything except thesedtag... and if the former - you'd don't need thesedtag... Please considering making an edit to your post to clarify that - thanks.– Jon Clements♦
Mar 23 at 15:21
Just in case you need it for some out of python operation
awk 'BEGINRS=ORS="";OFS="," ;printf "[" $1=$1;print ENDprint "]n"' file– PS.
Mar 23 at 15:31
Append
| tr -d 'n'?– Cyrus
Mar 23 at 15:56
Thank you @Cyrus. That's a pretty good command line answer. You should make it an actual answer
– Joshua Segal
Mar 23 at 21:00