Retrieve the first few lines from testing result with head -n
0
I am testing a python program and desire to retrieve its first two lines of results
$ python twoSum.py
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 151
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 194
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 247
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 192
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 206
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 171
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 170
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 190
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 132
DEBUG-MainProcess:31921-MainThread:140190102726464 j: 63
[8, 63]
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
Employ head to tackle the text
$ python twoSum.py | head -n 1
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 259
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 235
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 133
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 274
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 265
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 257
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 280
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 134
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 138
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 145
DEBUG-MainProcess:31978-MainThread:140699277834048 j: 75
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
It does not work,
How could I retrieve the first few lines which I want to see.
bash python3
asked 34 mins ago
JawSawJawSaw
445314
add a comment |
0
I am testing a python program and desire to retrieve its first two lines of results
$ python twoSum.py
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 151
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 194
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 247
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 192
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 206
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 171
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 170
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 190
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 132
DEBUG-MainProcess:31921-MainThread:140190102726464 j: 63
[8, 63]
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
Employ head to tackle the text
$ python twoSum.py | head -n 1
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 259
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 235
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 133
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 274
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 265
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 257
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 280
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 134
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 138
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 145
DEBUG-MainProcess:31978-MainThread:140699277834048 j: 75
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
It does not work,
How could I retrieve the first few lines which I want to see.
bash python3
asked 34 mins ago
JawSawJawSaw
445314
could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago
add a comment |
0
0
0
I am testing a python program and desire to retrieve its first two lines of results
$ python twoSum.py
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 151
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 194
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 247
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 192
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 206
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 171
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 170
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 190
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 132
DEBUG-MainProcess:31921-MainThread:140190102726464 j: 63
[8, 63]
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
Employ head to tackle the text
$ python twoSum.py | head -n 1
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 259
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 235
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 133
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 274
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 265
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 257
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 280
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 134
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 138
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 145
DEBUG-MainProcess:31978-MainThread:140699277834048 j: 75
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
It does not work,
How could I retrieve the first few lines which I want to see.
bash python3
asked 34 mins ago
JawSawJawSaw
445314
I am testing a python program and desire to retrieve its first two lines of results
$ python twoSum.py
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 151
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 194
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 247
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 192
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 206
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 171
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 170
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 190
DEBUG-MainProcess:31921-MainThread:140190102726464 j: None
DEBUG-MainProcess:31921-MainThread:140190102726464 find: 132
DEBUG-MainProcess:31921-MainThread:140190102726464 j: 63
[8, 63]
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
Employ head to tackle the text
$ python twoSum.py | head -n 1
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 259
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 235
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 133
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 274
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 265
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 257
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 280
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 134
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 138
DEBUG-MainProcess:31978-MainThread:140699277834048 j: None
DEBUG-MainProcess:31978-MainThread:140699277834048 find: 145
DEBUG-MainProcess:31978-MainThread:140699277834048 j: 75
.
----------------------------------------------------------------------
Ran 1 test in 0.001s
It does not work,
How could I retrieve the first few lines which I want to see.
bash python3
bash python3
asked 34 mins ago
JawSawJawSaw
445314
asked 34 mins ago
JawSawJawSaw
445314
edited 29 mins ago
JawSaw
asked 34 mins ago
JawSawJawSaw
445314
asked 34 mins ago
JawSawJawSaw
445314
asked 34 mins ago
JawSawJawSaw
445314
445314
could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago
add a comment |
could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago
could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago
could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago
add a comment |
1 Answer
1
active
oldest
votes
1
Likely the DEBUG- outputs are going to the standard error stream rather than the standard output stream - try
python twoSum.py 2>&1 | head -n 1
to redirect stderr (file descriptor #2) to stdout (file descriptor #1); or (bash shorthand)
python twoSum.py |& head -n 1
For further information see the related question Using grep with pipe and ampersand to filter errors from find.
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
add a comment |
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1 Answer
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
Likely the DEBUG- outputs are going to the standard error stream rather than the standard output stream - try
python twoSum.py 2>&1 | head -n 1
to redirect stderr (file descriptor #2) to stdout (file descriptor #1); or (bash shorthand)
python twoSum.py |& head -n 1
For further information see the related question Using grep with pipe and ampersand to filter errors from find.
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
add a comment |
1
Likely the DEBUG- outputs are going to the standard error stream rather than the standard output stream - try
python twoSum.py 2>&1 | head -n 1
to redirect stderr (file descriptor #2) to stdout (file descriptor #1); or (bash shorthand)
python twoSum.py |& head -n 1
For further information see the related question Using grep with pipe and ampersand to filter errors from find.
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
add a comment |
1
1
1
Likely the DEBUG- outputs are going to the standard error stream rather than the standard output stream - try
python twoSum.py 2>&1 | head -n 1
to redirect stderr (file descriptor #2) to stdout (file descriptor #1); or (bash shorthand)
python twoSum.py |& head -n 1
For further information see the related question Using grep with pipe and ampersand to filter errors from find.
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
Likely the DEBUG- outputs are going to the standard error stream rather than the standard output stream - try
python twoSum.py 2>&1 | head -n 1
to redirect stderr (file descriptor #2) to stdout (file descriptor #1); or (bash shorthand)
python twoSum.py |& head -n 1
For further information see the related question Using grep with pipe and ampersand to filter errors from find.
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
answered 14 mins ago
steeldriversteeldriver
69.8k11114186
69.8k11114186
add a comment |
add a comment |
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could you please transmit the comment to answer. @steeldriver
– JawSaw
18 mins ago