如何使用pandas和csv模块在python中的for循环后保存字符串输出？

Question

I have the following for loop:

    for titles in titles:
        title = titles.xpath("a/text()").extract()
        link = titles.xpath("a/@href").extract()
        print(title, link)

How can I dump the title and link into a formmated .csv file?

Answer 1

You should use the python CSV module. Look here for more information: Writing List of Strings to Excel CSV File in Python .

Here is an example for your problem:

import csv
results = []

# your code... also add this to your for loop.
    results.append([title, link])

csv_file = open("csv_file.csv",'wb')
wr = csv.writer(csv_file)
for row in results:
    wr.writerow(row)

Answer 2

Something like this ( documentation ):

...
doc_path = "path/to/doc.csv" # must exist, first folder on the place
                             # where you are running the script!
with open(doc_path, 'a') as doc:
    for entry in titles:
        title = entry.xpath("a/text()").extract()
        link  = entry.xpath("a/@href").extract()
        print(title, link)
        doc.write(str(title)+','+str(link)+'\n')

Answer 3

Use a csv writer .

Basic usage:

import csv
with open('file.csv') as f:
    writer = csv.writer(f)
    writer.writerow(["title", "link"])

Answer 4

result = []
for titles in titles:
    title = titles.xpath("a/text()").extract()
    link = titles.xpath("a/@href").extract()
    print(title, link)
    result += [title + ',' + link + '\n']

with open("result.csv" "w+") as f:
    f.writelines(result)