python - Scrapy:将参数传递给 cmdline.execute()

Question

我知道从命令行运行 scrapy 蜘蛛时如何传递参数。但是，当我尝试使用 scrapy 的 cmdline.execute() 从脚本以编程方式运行它时遇到问题。

我需要传递的参数是我之前格式化为字符串的列表，就像这样:

numbers = "one,two,three,four,five"
colors = "red,blue,black,yellow,pink"

cmdline.execute('scrapy crawl myspider -a arg1='+numbers+' -a arg2='+colors)

蜘蛛是...

    class MySpider(Spider):

        name = "myS"

        def __init__(self, arg1, arg2):
            super(MySpider, self).__init__()

#Rest of the code

但是，当我运行它时，出现了这个错误:

  Traceback (most recent call last):
  File "C:/Users/ME/projects/script.py", line 207, in run
    cmdline.execute("scrapy crawl myS -a arg1="+numbers+" -a data="+colors)
  File "C:\Python27\lib\site-packages\scrapy\cmdline.py", line 123, in execute
    cmdname = _pop_command_name(argv)
  File "C:\Python27\lib\site-packages\scrapy\cmdline.py", line 57, in _pop_command_name
    del argv[i]
TypeError: 'str' object doesn't support item deletion

有什么想法吗？

操作系统:Windows7； Python版本:2.7.8

Answer 1

execute() 函数需要参数列表，而不是字符串。试试这个:

cmdline.execute([
    'scrapy', 'crawl', 'myspider',
    '-a', 'arg1='+numbers, '-a', 'arg2='+colors])