Nested lists in python containing a single string and not single letters
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I need to load text from a file which contains several lines, each line contains letters separated by coma, into a 2-dimensional list. When I run this, I get a 2 dimensional list, but the nested lists contain single strings instead of separated values, and I can not iterate over them. how do I solve this?
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split()
matrix.append(line)
return matrix
result:
[['a,p,p,l,e'], ['a,g,o,d,o'], ['n,n,e,r,t'], ['g,a,T,A,C'], ['m,i,c,s,r'], ['P,o,P,o,P']]
I need each letter in the nested lists to be a single string so I can use them.
thanks in advance
python list
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
add a comment |
I need to load text from a file which contains several lines, each line contains letters separated by coma, into a 2-dimensional list. When I run this, I get a 2 dimensional list, but the nested lists contain single strings instead of separated values, and I can not iterate over them. how do I solve this?
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split()
matrix.append(line)
return matrix
result:
[['a,p,p,l,e'], ['a,g,o,d,o'], ['n,n,e,r,t'], ['g,a,T,A,C'], ['m,i,c,s,r'], ['P,o,P,o,P']]
I need each letter in the nested lists to be a single string so I can use them.
thanks in advance
python list
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
So you need'a,p,p,l,e'to be'apple'or'a','p','p','l','e'?
– Austin
Nov 17 '18 at 7:04
add a comment |
I need to load text from a file which contains several lines, each line contains letters separated by coma, into a 2-dimensional list. When I run this, I get a 2 dimensional list, but the nested lists contain single strings instead of separated values, and I can not iterate over them. how do I solve this?
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split()
matrix.append(line)
return matrix
result:
[['a,p,p,l,e'], ['a,g,o,d,o'], ['n,n,e,r,t'], ['g,a,T,A,C'], ['m,i,c,s,r'], ['P,o,P,o,P']]
I need each letter in the nested lists to be a single string so I can use them.
thanks in advance
python list
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
I need to load text from a file which contains several lines, each line contains letters separated by coma, into a 2-dimensional list. When I run this, I get a 2 dimensional list, but the nested lists contain single strings instead of separated values, and I can not iterate over them. how do I solve this?
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split()
matrix.append(line)
return matrix
result:
[['a,p,p,l,e'], ['a,g,o,d,o'], ['n,n,e,r,t'], ['g,a,T,A,C'], ['m,i,c,s,r'], ['P,o,P,o,P']]
I need each letter in the nested lists to be a single string so I can use them.
thanks in advance
python list
python list
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
edited Nov 17 '18 at 7:02
AkshayNevrekar
6,261102142
6,261102142
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
asked Nov 17 '18 at 6:53
TegernakoTegernako
576
576
So you need'a,p,p,l,e'to be'apple'or'a','p','p','l','e'?
– Austin
Nov 17 '18 at 7:04
add a comment |
So you need'a,p,p,l,e'to be'apple'or'a','p','p','l','e'?
– Austin
Nov 17 '18 at 7:04
So you need
'a,p,p,l,e' to be 'apple' or 'a','p','p','l','e' ?– Austin
Nov 17 '18 at 7:04
So you need
'a,p,p,l,e' to be 'apple' or 'a','p','p','l','e' ?– Austin
Nov 17 '18 at 7:04
add a comment |
3 Answers
3
active
oldest
votes
split() function splits on white space by default. You can fix this by passing the string you want to split on. In this case, that would be a comma. The code below should work.
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
matrix.append(line)
return matrix
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
add a comment |
The input format you described conforms to CSV format. Python has a library just for reading CSV files. If you just want to get the job done, you can use this library to do the work for you. Here's an example:
Input(test.csv):
a,string,here
more,strings,here
Code:
>>> import csv
>>> lines =
>>> with open('test.csv') as file:
... reader = csv.reader(file)
... for row in reader:
... lines.append(row)
...
>>>
Output:
>>> lines
[['a', 'string', 'here'], ['more', 'strings', 'here']]
answered Nov 17 '18 at 7:13
richflowrichflow
968212
add a comment |
Using the strip() function will get rid of the new line character as well:
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
line[-1] = line[-1].strip()
matrix.append(line)
return matrix
answered Nov 17 '18 at 7:39
reedx8reedx8
186
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
split() function splits on white space by default. You can fix this by passing the string you want to split on. In this case, that would be a comma. The code below should work.
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
matrix.append(line)
return matrix
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
add a comment |
split() function splits on white space by default. You can fix this by passing the string you want to split on. In this case, that would be a comma. The code below should work.
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
matrix.append(line)
return matrix
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
add a comment |
split() function splits on white space by default. You can fix this by passing the string you want to split on. In this case, that would be a comma. The code below should work.
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
matrix.append(line)
return matrix
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
split() function splits on white space by default. You can fix this by passing the string you want to split on. In this case, that would be a comma. The code below should work.
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
matrix.append(line)
return matrix
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
answered Nov 17 '18 at 6:59
merlynmerlyn
1,78011323
1,78011323
add a comment |
add a comment |
The input format you described conforms to CSV format. Python has a library just for reading CSV files. If you just want to get the job done, you can use this library to do the work for you. Here's an example:
Input(test.csv):
a,string,here
more,strings,here
Code:
>>> import csv
>>> lines =
>>> with open('test.csv') as file:
... reader = csv.reader(file)
... for row in reader:
... lines.append(row)
...
>>>
Output:
>>> lines
[['a', 'string', 'here'], ['more', 'strings', 'here']]
answered Nov 17 '18 at 7:13
richflowrichflow
968212
add a comment |
The input format you described conforms to CSV format. Python has a library just for reading CSV files. If you just want to get the job done, you can use this library to do the work for you. Here's an example:
Input(test.csv):
a,string,here
more,strings,here
Code:
>>> import csv
>>> lines =
>>> with open('test.csv') as file:
... reader = csv.reader(file)
... for row in reader:
... lines.append(row)
...
>>>
Output:
>>> lines
[['a', 'string', 'here'], ['more', 'strings', 'here']]
answered Nov 17 '18 at 7:13
richflowrichflow
968212
add a comment |
The input format you described conforms to CSV format. Python has a library just for reading CSV files. If you just want to get the job done, you can use this library to do the work for you. Here's an example:
Input(test.csv):
a,string,here
more,strings,here
Code:
>>> import csv
>>> lines =
>>> with open('test.csv') as file:
... reader = csv.reader(file)
... for row in reader:
... lines.append(row)
...
>>>
Output:
>>> lines
[['a', 'string', 'here'], ['more', 'strings', 'here']]
answered Nov 17 '18 at 7:13
richflowrichflow
968212
The input format you described conforms to CSV format. Python has a library just for reading CSV files. If you just want to get the job done, you can use this library to do the work for you. Here's an example:
Input(test.csv):
a,string,here
more,strings,here
Code:
>>> import csv
>>> lines =
>>> with open('test.csv') as file:
... reader = csv.reader(file)
... for row in reader:
... lines.append(row)
...
>>>
Output:
>>> lines
[['a', 'string', 'here'], ['more', 'strings', 'here']]
answered Nov 17 '18 at 7:13
richflowrichflow
968212
answered Nov 17 '18 at 7:13
richflowrichflow
968212
answered Nov 17 '18 at 7:13
richflowrichflow
968212
answered Nov 17 '18 at 7:13
richflowrichflow
968212
968212
add a comment |
add a comment |
Using the strip() function will get rid of the new line character as well:
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
line[-1] = line[-1].strip()
matrix.append(line)
return matrix
answered Nov 17 '18 at 7:39
reedx8reedx8
186
add a comment |
Using the strip() function will get rid of the new line character as well:
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
line[-1] = line[-1].strip()
matrix.append(line)
return matrix
answered Nov 17 '18 at 7:39
reedx8reedx8
186
add a comment |
Using the strip() function will get rid of the new line character as well:
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
line[-1] = line[-1].strip()
matrix.append(line)
return matrix
answered Nov 17 '18 at 7:39
reedx8reedx8
186
Using the strip() function will get rid of the new line character as well:
def read_matrix_file(filename):
matrix =
with open(filename, 'r') as matrix_letters:
for line in matrix_letters:
line = line.split(',')
line[-1] = line[-1].strip()
matrix.append(line)
return matrix
answered Nov 17 '18 at 7:39
reedx8reedx8
186
answered Nov 17 '18 at 7:39
reedx8reedx8
186
answered Nov 17 '18 at 7:39
reedx8reedx8
186
answered Nov 17 '18 at 7:39
reedx8reedx8
186
186
add a comment |
add a comment |
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So you need
'a,p,p,l,e'to be'apple'or'a','p','p','l','e'?– Austin
Nov 17 '18 at 7:04