Reputation: 15
I have a code that writes a bunch of lines to csv files. It writes what i want, but... it inserts brackets in each column... The code is:
root_text_csv = "C:/Users/s/Desktop/text/knife"+numarul_folderelor+".csv"
fisier_text_knife = csv.writer(open(root_text_csv,'wb'))
row_test = []
for filenames in os.listdir(foldere_prrra):
knife = filenames.replace("<SP>", " ").replace(".sys", "")
test = ['cut '+knife+' off for fuged,', 'cut '+knife+' off,', 'cut '+knife+' fool alabala,', 'cut '+knife+' nieh,', 'prrra '+knife+' alabala,',
'cut '+knife+' fuged streaming,', 'cut '+knife+' alabala fuged,', 'cut '+knife+' off alabala,', 'prrra '+knife+' fool alabala,',
'cut '+knife+' off fuged,', 'prrra '+knife+' niether alabala,', 'cut off '+knife+' for fuged,' 'cut '+knife+' fuged fool alabala,',
'cut '+knife+' off niether,', 'where to cut '+knife+',', ''+knife+' fool alabala off,', 'steel '+knife+' off fuged,', 'cut '+knife+' fuged niether,',
''+knife+' fool alabala off,', 'fuged streaming '+knife+',', 'cut '+knife+' niether,', 'cut '+knife+' fuged,', 'red '+knife+' off,', ''+knife+' off,',
'red '+knife+',', 'cut '+knife+',', ''+knife+' fuged,', 'fuged '+knife+',', ''+knife+' off,', 'off '+knife+',', ''+knife+',']
random.shuffle(test)
scris = [x for x in test if len(x) <= 30]
row_test.append(scris) #row_test.append(scris[0])
fisier_text_knife.writerow(row_test)
If i replace the row_test.append(scris[0:7])
with row_test.append(scris[0])
it writes only one string off them all(but writes it without the brackets -->[ ]<--).
I want to write 7 or 8 lines. I wasted my brain on this code.
Thank you for the time.
Upvotes: 1
Views: 890
Reputation: 16242
The reason this is happening is because scris
is a list.
instead of:
row_test.append(scris[0:7])
do this rather:
row_test += scris[0:7]
This works too (see comment below):
row_test.extend(scris[0:7])
If it still doesn't make sense open a console and type in the example stuff below. Every time you change l
print it out.
the example below should show you why this works:
l = [1,2,3] # l = [1,2,3]
l.extend([4,5]) #now l = [1,2,3,4,5]
l.append([6,7]) #now l = [1,2,3,4,5,[6,7]]
l.extend('hi there') #raises an exception
When you call some_list.append(some_item)
it puts some_item
inside some_list
. So if some_item
is also a list then you get a list inside a list.
When you call some_list.extend(some_item)
it joins some_item
to the end of some_list
. So if some_item
is not a list then this will error.
EDIT I think i see what you want now...
So given a list like [['1','2','3'],['4','5','6'],['7','8','9']]
you want the csv to look like: 123,456,789
, right?
Instead of:
fisier_text_knife.writerow(row_test)
Try this out:
csv_friendly = [''.join(l) for l in row_test]
fisier_text_knife.writerow(csv_friendly)
Upvotes: 1
Reputation: 962
The string which will be written to the file is the same as when you print(row_test) - as a list of lists.
You can use join for that to create a large string for each line, something like:
row_test+= ','.join(scris) + '\n'
Upvotes: 1