Mixing
Python reading only some lines of a text file [closed]
I have text file like the following and what I would like to do it read three lines that start with 0 and three lines that start with 1 and so on until 30-40. And would like to print them on the same line. How could I accomplish this? Thank you very much!
0 something
0 something2
0 something3
0 something4
0 something5
0 something6
1 something
1 something2
1 something3
1 something4
1 something5
1 something6
Desired output:
0 something something2 something3
1 something something2 something3
python
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
closed as too broad by tripleee, stovfl, Michael Dodd, Serge Ballesta, gnat Jan 2 at 12:32
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I have text file like the following and what I would like to do it read three lines that start with 0 and three lines that start with 1 and so on until 30-40. And would like to print them on the same line. How could I accomplish this? Thank you very much!
0 something
0 something2
0 something3
0 something4
0 something5
0 something6
1 something
1 something2
1 something3
1 something4
1 something5
1 something6
Desired output:
0 something something2 something3
1 something something2 something3
python
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
closed as too broad by tripleee, stovfl, Michael Dodd, Serge Ballesta, gnat Jan 2 at 12:32
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
2
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
1
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12
add a comment |
I have text file like the following and what I would like to do it read three lines that start with 0 and three lines that start with 1 and so on until 30-40. And would like to print them on the same line. How could I accomplish this? Thank you very much!
0 something
0 something2
0 something3
0 something4
0 something5
0 something6
1 something
1 something2
1 something3
1 something4
1 something5
1 something6
Desired output:
0 something something2 something3
1 something something2 something3
python
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
I have text file like the following and what I would like to do it read three lines that start with 0 and three lines that start with 1 and so on until 30-40. And would like to print them on the same line. How could I accomplish this? Thank you very much!
0 something
0 something2
0 something3
0 something4
0 something5
0 something6
1 something
1 something2
1 something3
1 something4
1 something5
1 something6
Desired output:
0 something something2 something3
1 something something2 something3
python
python
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
asked Jan 2 at 12:02
Rulli SmithRulli Smith
781110
781110
closed as too broad by tripleee, stovfl, Michael Dodd, Serge Ballesta, gnat Jan 2 at 12:32
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as too broad by tripleee, stovfl, Michael Dodd, Serge Ballesta, gnat Jan 2 at 12:32
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
2
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
1
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12
add a comment |
2
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
1
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12
2
2
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
1
1
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12
add a comment |
1 Answer
1
active
oldest
votes
Try this:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output =
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append() # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try this:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output =
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append() # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
add a comment |
Try this:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output =
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append() # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
add a comment |
Try this:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output =
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append() # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
Try this:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output =
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append() # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
answered Jan 2 at 12:30
GeeTransitGeeTransit
694316
694316
add a comment |
add a comment |
2
What have you searched for, and what did you find? What have you tried, and how did it fail? We expect your question to contain an attempt of your own, or at least some hints about where exactly you are stuck.
– tripleee
Jan 2 at 12:11
1
Also, "magical numbers" are problematic. Can you articulate a reason why you want exactly three lines from the first group and three from the next? Very often, a program which implements a principle will be a lot more useful than one which has a bunch of ad-hoc limitations.
– tripleee
Jan 2 at 12:12