Python argparse布尔问题

Question

我在设置布尔值时遇到了问题。我的代码是：

training_pages_list_file = '' 
html_page_dir = '' 
clf_file_str = '' 
user_idf_param = False 

if __name__ == "__main__": 
    parser = argparse.ArgumentParser(description='Classify some CraigsList Pages') 
    parser.add_argument('csv_file', action='store') 
    parser.add_argument('file_dir', action='store') 
    parser.add_argument('clf_file', action='store') 
    parser.add_argument('-i', action='store_true', help="include idf", dest=user_idf_param, default=False) 
    args = parser.parse_args() 

然而，这引起了：

hon3.4/argparse.py", line 1721, in parse_args 
    args, argv = self.parse_known_args(args, namespace) 
    File "/usr/local/Cellar/python3/3.4.2_1/Frameworks/Python.framework/Versions/3.4/lib/python3.4/argparse.py", line 1742, in parse_known_args 
    if not hasattr(namespace, action.dest): 
TypeError: hasattr(): attribute name must be string 

我怎么能有这么如果包括-i，它将设置user_idf_param到True？

Answer 1

看起来像user_idf_param应该是一个属性的名称，告诉你它是否被使用。

import argparse 

training_pages_list_file = '' 
html_page_dir = '' 
clf_file_str = '' 
user_idf_param = "i_param_used" 

if __name__ == "__main__": 
    parser = argparse.ArgumentParser(description='Classify some CraigsList Pages') 
    parser.add_argument('csv_file', action='store') 
    parser.add_argument('file_dir', action='store') 
    parser.add_argument('clf_file', action='store') 
    parser.add_argument('-i', action='store_true', help="include idf", dest=user_idf_param, default=False) 

    args = parser.parse_args((...)) 

    if args.i_param_used: 
     ...