I've a nested list like Python_List
below and I want to make a .csv
like below:
Python_List|-> .csv
[['2','4'],| 2,4
['6','7'],| 6,7
['5','9'],| 5,9
['4','7']]| 4,7
So far I'm using this code:
Python_List=[['2','4'], ['6','7'], ['5','9'], ['4','7']]
with open('test.csv','w') as f:
for i in range(0,len(Python_List)):
f.write('%s,%s\n' %(Python_List[i][0],Python_List[i][1]))
Are there any alternatives more efficient?
Consider using the writer method of the csv module.
It may not be more efficient but it will be easier to understand.
For Example
import csv
with open('test.csv', 'w') as csvfile:
csvwriter = csv.writer(csvfile, delimiter=',')
csvwriter.writerows(Python_List)
>>> i = [['2','4'], ['6','7'], ['5','9'], ['4','7']]
>>> with open('test.csv','w') as f:
... writer = csv.writer(f)
... writer.writerows(i)
...
>>> quit()
$ cat test.csv
2,4
6,7
5,9
4,7
You can csv module and its writer
method, like this
pyList = [['2','4'], ['6','7'], ['5','9'], ['4','7']]
import csv
with open('Output.txt', 'wb') as csvfile:
csvwriter = csv.writer(csvfile, delimiter=',')
map(csvwriter.writerow, pyList)
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