What is the best way in xonsh to loop over the lines of a file?
What is the best way in the xonsh shell to loop over the lines of a text file?
(A) At the moment I'm using
for l in !(cat file.txt):
line = l.strip()
# Do something with line...
(B) Of course, there is also
with open(p'file.txt') as f:
for l in f:
line = l.strip()
# Do something with line...
I use (A) because it is shorter, but is there anything even more concise? And preferably folding the l.strip() into the loop?
Note: My main interest is conciseness (in the sense of a small character count) - maybe using xonsh's special syntax features if that helps the cause.
python bash xonsh
asked Nov 12 '18 at 0:31
halloleo
2,37752258
add a comment |
What is the best way in the xonsh shell to loop over the lines of a text file?
(A) At the moment I'm using
for l in !(cat file.txt):
line = l.strip()
# Do something with line...
(B) Of course, there is also
with open(p'file.txt') as f:
for l in f:
line = l.strip()
# Do something with line...
I use (A) because it is shorter, but is there anything even more concise? And preferably folding the l.strip() into the loop?
Note: My main interest is conciseness (in the sense of a small character count) - maybe using xonsh's special syntax features if that helps the cause.
python bash xonsh
asked Nov 12 '18 at 0:31
halloleo
2,37752258
add a comment |
What is the best way in the xonsh shell to loop over the lines of a text file?
(A) At the moment I'm using
for l in !(cat file.txt):
line = l.strip()
# Do something with line...
(B) Of course, there is also
with open(p'file.txt') as f:
for l in f:
line = l.strip()
# Do something with line...
I use (A) because it is shorter, but is there anything even more concise? And preferably folding the l.strip() into the loop?
Note: My main interest is conciseness (in the sense of a small character count) - maybe using xonsh's special syntax features if that helps the cause.
python bash xonsh
asked Nov 12 '18 at 0:31
halloleo
2,37752258
What is the best way in the xonsh shell to loop over the lines of a text file?
(A) At the moment I'm using
for l in !(cat file.txt):
line = l.strip()
# Do something with line...
(B) Of course, there is also
with open(p'file.txt') as f:
for l in f:
line = l.strip()
# Do something with line...
I use (A) because it is shorter, but is there anything even more concise? And preferably folding the l.strip() into the loop?
Note: My main interest is conciseness (in the sense of a small character count) - maybe using xonsh's special syntax features if that helps the cause.
python bash xonsh
python bash xonsh
asked Nov 12 '18 at 0:31
halloleo
2,37752258
asked Nov 12 '18 at 0:31
halloleo
2,37752258
edited Nov 12 '18 at 2:33
asked Nov 12 '18 at 0:31
halloleo
2,37752258
asked Nov 12 '18 at 0:31
halloleo
2,37752258
asked Nov 12 '18 at 0:31
halloleo
2,37752258
2,37752258
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
You can fold str.strip() into the loop with map():
(A):
for l in map(str.strip, !(cat file.txt)):
# Do something with line...
(B):
with open('file.txt') as f:
for l in map(str.strip, f):
# Do something with l..
edited Nov 12 '18 at 1:30
halloleo
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
add a comment |
Minimal character count could even involve relying on your python implementation to release the file at the end of execution, rather than doing it explicitly:
for l in map(str.strip, open('file.txt')):
# do stuff with l
Or using the p'' string to make a path in xonsh (this does properly close the file):
for l in p'file.txt'.read_text().splitlines():
# do stuff with l
splitlines() already removes the new line characters, but not other whitespace.
edited Nov 14 '18 at 0:56
halloleo
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method onPathobjects is calledread_text, notget_text. Edited the answer accordingly.
– halloleo
Nov 14 '18 at 0:58
|
show 1 more comment
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can fold str.strip() into the loop with map():
(A):
for l in map(str.strip, !(cat file.txt)):
# Do something with line...
(B):
with open('file.txt') as f:
for l in map(str.strip, f):
# Do something with l..
edited Nov 12 '18 at 1:30
halloleo
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
add a comment |
You can fold str.strip() into the loop with map():
(A):
for l in map(str.strip, !(cat file.txt)):
# Do something with line...
(B):
with open('file.txt') as f:
for l in map(str.strip, f):
# Do something with l..
edited Nov 12 '18 at 1:30
halloleo
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
add a comment |
You can fold str.strip() into the loop with map():
(A):
for l in map(str.strip, !(cat file.txt)):
# Do something with line...
(B):
with open('file.txt') as f:
for l in map(str.strip, f):
# Do something with l..
edited Nov 12 '18 at 1:30
halloleo
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
You can fold str.strip() into the loop with map():
(A):
for l in map(str.strip, !(cat file.txt)):
# Do something with line...
(B):
with open('file.txt') as f:
for l in map(str.strip, f):
# Do something with l..
edited Nov 12 '18 at 1:30
halloleo
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
edited Nov 12 '18 at 1:30
halloleo
2,37752258
edited Nov 12 '18 at 1:30
halloleo
2,37752258
edited Nov 12 '18 at 1:30
halloleo
2,37752258
2,37752258
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
answered Nov 12 '18 at 0:55
RoadRunner
10.7k31340
10.7k31340
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
add a comment |
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
Yes, both versions work. I have just tested them in xonsh 0.8.3.
– halloleo
Nov 12 '18 at 2:39
add a comment |
Minimal character count could even involve relying on your python implementation to release the file at the end of execution, rather than doing it explicitly:
for l in map(str.strip, open('file.txt')):
# do stuff with l
Or using the p'' string to make a path in xonsh (this does properly close the file):
for l in p'file.txt'.read_text().splitlines():
# do stuff with l
splitlines() already removes the new line characters, but not other whitespace.
edited Nov 14 '18 at 0:56
halloleo
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method onPathobjects is calledread_text, notget_text. Edited the answer accordingly.
– halloleo
Nov 14 '18 at 0:58
|
show 1 more comment
Minimal character count could even involve relying on your python implementation to release the file at the end of execution, rather than doing it explicitly:
for l in map(str.strip, open('file.txt')):
# do stuff with l
Or using the p'' string to make a path in xonsh (this does properly close the file):
for l in p'file.txt'.read_text().splitlines():
# do stuff with l
splitlines() already removes the new line characters, but not other whitespace.
edited Nov 14 '18 at 0:56
halloleo
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method onPathobjects is calledread_text, notget_text. Edited the answer accordingly.
– halloleo
Nov 14 '18 at 0:58
|
show 1 more comment
Minimal character count could even involve relying on your python implementation to release the file at the end of execution, rather than doing it explicitly:
for l in map(str.strip, open('file.txt')):
# do stuff with l
Or using the p'' string to make a path in xonsh (this does properly close the file):
for l in p'file.txt'.read_text().splitlines():
# do stuff with l
splitlines() already removes the new line characters, but not other whitespace.
edited Nov 14 '18 at 0:56
halloleo
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
Minimal character count could even involve relying on your python implementation to release the file at the end of execution, rather than doing it explicitly:
for l in map(str.strip, open('file.txt')):
# do stuff with l
Or using the p'' string to make a path in xonsh (this does properly close the file):
for l in p'file.txt'.read_text().splitlines():
# do stuff with l
splitlines() already removes the new line characters, but not other whitespace.
edited Nov 14 '18 at 0:56
halloleo
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
edited Nov 14 '18 at 0:56
halloleo
2,37752258
edited Nov 14 '18 at 0:56
halloleo
2,37752258
edited Nov 14 '18 at 0:56
halloleo
2,37752258
2,37752258
answered Nov 12 '18 at 1:27
soundstripe
48138
answered Nov 12 '18 at 1:27
soundstripe
48138
answered Nov 12 '18 at 1:27
soundstripe
48138
48138
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method onPathobjects is calledread_text, notget_text. Edited the answer accordingly.
– halloleo
Nov 14 '18 at 0:58
|
show 1 more comment
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method onPathobjects is calledread_text, notget_text. Edited the answer accordingly.
– halloleo
Nov 14 '18 at 0:58
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
I wouldn't say this is in any way more concise than the code in the question...
– halloleo
Nov 12 '18 at 2:29
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
True...I misinterpreted your need for conciseness as a need for readability.
– soundstripe
Nov 12 '18 at 2:59
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Edited my response for brevity in code. Note that CPython will auto-close your file at program exit but other Python implementations may not.
– soundstripe
Nov 12 '18 at 14:34
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Wow, the version with the p'' notation looks now pretty compelling to me. Thx.
– halloleo
Nov 13 '18 at 11:18
Just realised that the method on
Path objects is called read_text, not get_text. Edited the answer accordingly.– halloleo
Nov 14 '18 at 0:58
Just realised that the method on
Path objects is called read_text, not get_text. Edited the answer accordingly.– halloleo
Nov 14 '18 at 0:58
|
show 1 more comment
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