python：将整行插入列表中
import csv
with open('thefile.csv', 'rb') as f:
data = list(csv.reader(f))
import collections
counter = collections.defaultdict(int)
for row in data:
counter[row[10]] += 1
with open('/pythonwork/thefile_subset11.csv', 'w') as outfile:
writer = csv.writer(outfile)
sample_cutoff=500
b[]
for row in data:
if counter[row[10]] >= sample_cutoff:
writer.writerow(row)
除了将数据写入文件之外，我还想将其插入到列表 b[] 中，
我可以执行 b.insert[row] 吗？
import csv
with open('thefile.csv', 'rb') as f:
data = list(csv.reader(f))
import collections
counter = collections.defaultdict(int)
for row in data:
counter[row[10]] += 1
with open('/pythonwork/thefile_subset11.csv', 'w') as outfile:
writer = csv.writer(outfile)
sample_cutoff=500
b[]
for row in data:
if counter[row[10]] >= sample_cutoff:
writer.writerow(row)
in addition to writing the data to a file, i would like to insert it into a list b[]
can i just do b.insert[row] ?
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评论（3）
它是
b.append(row)，但除此之外是的。而不是b[]，而是b = []。另一种方法是先创建列表，然后将列表的每个元素写入文件：It's
b.append(row), but otherwise yes. And instead ofb[]you wantb = []. Another way to do it would be to make the list first, and then just write each element of the list to the file:是的，
b = []将支持insert方法。语法如下。Yes,
b = []would support aninsertmethod. The syntax is as follows.它是 list.insert(index, item) 或 list.append(item)。
另外，
b[]是名称错误和语法错误。我想你的意思是b = []。It's list.insert(index, item) or list.append(item).
Also,
b[]is a name error and syntax error. I suppose you meanb = [].