how can I input a list of lists to make a matrix and change columns by using map function
0
I can't get input a list of lists. I get this error :
TypeError Traceback (most recent call last)
<ipython-input-4-8c5f7927bb96> in <module>
9 print(liste)
10
---> 11 list(map(change, liste ))
12
13
<ipython-input-4-8c5f7927bb96> in change(liste)
5 def change(liste):
6 temp = liste[0]
----> 7 liste[0] = liste[-1]
8 liste[-1] = temp
9 print(liste)
TypeError: 'str' object does not support item assignment
I tried making the list of lists manually
I wrote this-> liste = [[1,2,3,4],[2,3,4,5],[6,7,8,9]]
and it worked but I need to get this as an input.
Here's my Python code:
liste = input(" mat= ")
def change(liste):
temp = liste[0]
liste[0] = liste[-1]
liste[-1] = temp
print(liste)
list(map(change, liste ))
python map-function
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
add a comment |
0
I can't get input a list of lists. I get this error :
TypeError Traceback (most recent call last)
<ipython-input-4-8c5f7927bb96> in <module>
9 print(liste)
10
---> 11 list(map(change, liste ))
12
13
<ipython-input-4-8c5f7927bb96> in change(liste)
5 def change(liste):
6 temp = liste[0]
----> 7 liste[0] = liste[-1]
8 liste[-1] = temp
9 print(liste)
TypeError: 'str' object does not support item assignment
I tried making the list of lists manually
I wrote this-> liste = [[1,2,3,4],[2,3,4,5],[6,7,8,9]]
and it worked but I need to get this as an input.
Here's my Python code:
liste = input(" mat= ")
def change(liste):
temp = liste[0]
liste[0] = liste[-1]
liste[-1] = temp
print(liste)
list(map(change, liste ))
python map-function
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
you can do:import ast; list(map(change, ast.literal_eval(liste )))
– YOLO
Dec 31 '18 at 16:54
add a comment |
0
0
0
1
I can't get input a list of lists. I get this error :
TypeError Traceback (most recent call last)
<ipython-input-4-8c5f7927bb96> in <module>
9 print(liste)
10
---> 11 list(map(change, liste ))
12
13
<ipython-input-4-8c5f7927bb96> in change(liste)
5 def change(liste):
6 temp = liste[0]
----> 7 liste[0] = liste[-1]
8 liste[-1] = temp
9 print(liste)
TypeError: 'str' object does not support item assignment
I tried making the list of lists manually
I wrote this-> liste = [[1,2,3,4],[2,3,4,5],[6,7,8,9]]
and it worked but I need to get this as an input.
Here's my Python code:
liste = input(" mat= ")
def change(liste):
temp = liste[0]
liste[0] = liste[-1]
liste[-1] = temp
print(liste)
list(map(change, liste ))
python map-function
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
I can't get input a list of lists. I get this error :
TypeError Traceback (most recent call last)
<ipython-input-4-8c5f7927bb96> in <module>
9 print(liste)
10
---> 11 list(map(change, liste ))
12
13
<ipython-input-4-8c5f7927bb96> in change(liste)
5 def change(liste):
6 temp = liste[0]
----> 7 liste[0] = liste[-1]
8 liste[-1] = temp
9 print(liste)
TypeError: 'str' object does not support item assignment
I tried making the list of lists manually
I wrote this-> liste = [[1,2,3,4],[2,3,4,5],[6,7,8,9]]
and it worked but I need to get this as an input.
Here's my Python code:
liste = input(" mat= ")
def change(liste):
temp = liste[0]
liste[0] = liste[-1]
liste[-1] = temp
print(liste)
list(map(change, liste ))
python map-function
python map-function
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
edited Dec 31 '18 at 16:46
Daniel Mesejo
18k21431
18k21431
asked Dec 31 '18 at 16:42
nnese nnese
6
asked Dec 31 '18 at 16:42
nnese nnese
6
asked Dec 31 '18 at 16:42
nnese nnese
6
6
Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
you can do:import ast; list(map(change, ast.literal_eval(liste )))
– YOLO
Dec 31 '18 at 16:54
add a comment |
Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
you can do:import ast; list(map(change, ast.literal_eval(liste )))
– YOLO
Dec 31 '18 at 16:54
Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
you can do:
import ast; list(map(change, ast.literal_eval(liste ))) – YOLO
Dec 31 '18 at 16:54
you can do:
import ast; list(map(change, ast.literal_eval(liste ))) – YOLO
Dec 31 '18 at 16:54
add a comment |
1 Answer
1
active
oldest
votes
1
Use `
import ast
liste = ast.literal_eval(input(" mat= "))`
As your error notifies you of, liste is a str. Every input is in fact a string. By using ast.literal_eval, it evaluates it and becomes a list of lists.
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
Then someone inputsimport os; os.remove(...)and you won't be happy. Better to useast.literal_evalorjson.loads.
– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
Use `
import ast
liste = ast.literal_eval(input(" mat= "))`
As your error notifies you of, liste is a str. Every input is in fact a string. By using ast.literal_eval, it evaluates it and becomes a list of lists.
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
Then someone inputsimport os; os.remove(...)and you won't be happy. Better to useast.literal_evalorjson.loads.
– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
add a comment |
1
Use `
import ast
liste = ast.literal_eval(input(" mat= "))`
As your error notifies you of, liste is a str. Every input is in fact a string. By using ast.literal_eval, it evaluates it and becomes a list of lists.
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
Then someone inputsimport os; os.remove(...)and you won't be happy. Better to useast.literal_evalorjson.loads.
– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
add a comment |
1
1
1
Use `
import ast
liste = ast.literal_eval(input(" mat= "))`
As your error notifies you of, liste is a str. Every input is in fact a string. By using ast.literal_eval, it evaluates it and becomes a list of lists.
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
Use `
import ast
liste = ast.literal_eval(input(" mat= "))`
As your error notifies you of, liste is a str. Every input is in fact a string. By using ast.literal_eval, it evaluates it and becomes a list of lists.
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
edited Dec 31 '18 at 17:01
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
answered Dec 31 '18 at 16:46
JondiedoopJondiedoop
1,945214
1,945214
Then someone inputsimport os; os.remove(...)and you won't be happy. Better to useast.literal_evalorjson.loads.
– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
add a comment |
Then someone inputsimport os; os.remove(...)and you won't be happy. Better to useast.literal_evalorjson.loads.
– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
Then someone inputs
import os; os.remove(...) and you won't be happy. Better to use ast.literal_eval or json.loads.– a_guest
Dec 31 '18 at 16:48
Then someone inputs
import os; os.remove(...) and you won't be happy. Better to use ast.literal_eval or json.loads.– a_guest
Dec 31 '18 at 16:48
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You are of course very right. If you write it as an answer, I'll remove mine. It all depends on who your users are, which I don't know in this case
– Jondiedoop
Dec 31 '18 at 16:51
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
You can include it in your answer, I don't mind.
– a_guest
Dec 31 '18 at 17:00
add a comment |
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Without a sample input and desired output, it's hard to give an answer without knowing what to do.
– Bazingaa
Dec 31 '18 at 16:44
you can do:
import ast; list(map(change, ast.literal_eval(liste )))– YOLO
Dec 31 '18 at 16:54