[英]How to save only lines containing a particular String (in a CSV file) as a separate CSV file?
我只想将包含特定字符串(在CSV文件中)的行另存为单独的CSV文件?
考虑以下文件:
foo,bar,zig,zag
zog,bar,zag,zag
qux,zig,zag,zag
quuux,bar,zag,zag
过滤为条形时,结果应为单独的CSV文件:
foo,bar,zig,zag
zog,bar,zag,zag
quuux,bar,zag,zag
最有效的方法是什么? 有没有执行此操作的代码,因为我需要为大约200个诸如“ bar”之类的名称执行此操作。
您可以按某一列过滤每一行(假设它始终是同一列):
import csv
names = ['bar', 'foo', 'foobar']
data = []
# read data
with open('all.csv', 'r') as csvfile:
spamreader = csv.reader(csvfile, delimiter=',')
for row in spamreader:
if row[1] in names:
data.append(row)
# maybe some more processing
# ...
# write back data that meets criteria
with open('bar.csv', 'wb') as csvfile:
spamwriter = csv.writer(csvfile, delimiter=',')
spamwriter.writerows(data)
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