parser.error("incorrect number of arguments")ifoptions.verbose:print"reading %s..."%options.filename [...]if__name__=="__main__": main() 参考资料 http://docs.python.org/library/optparse.html 原文地址 http://mrwlwan.wordpress.com/2008/09/25/python%ef%bc%9a-%e4%bd%bf%e7%94%a8...
("-q", "--quiet", action="store_false", dest="verbose") [...] (options, args) = parser.parse_args() if len(args) != 1: parser.error("incorrect number of arguments") if options.verbose: print "reading %s..." % options.filename [...] if __name__ == "__main__": ...
原因:代码中有语法错误。 示例:File "file name", line number def incorrect(f) ^ SyntaxError: invalid syntax 解决方案:检查错误位置,确保语法正确。 IndentationError(缩进错误) 原因:代码缩进不正确。 示例:File "file name", line number print('improper indentation') IndentationError: unindent does not ma...
defmain():usage="usage: %prog [options] arg"parser=OptionParser(usage)parser.add_option("-f","--file",dest="filename",help="read data from FILENAME")parser.add_option("-v","--verbose",action="store_true",dest="verbose")parser.add_option("-q","--quiet",action="store_false",de...
copy_queue = queue.copy() # create a shallow copy of the deque queue.count(x) # count the number of deque elements equal to x queue.extend([4, 5, 6]) # extend right by an iterable queue.extendleft([1, 2, 3]) # extend left by an iterable ...
parser.error("incorrect of arguments") if options.verbose: print("reading %s..." % options.filename) if __name__ == "__main__": main() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19....
Return the absolute value of a number. The argument may be an integer or a floating point number. If the argument is a complex number, its magnitude is returned. (二).大意 返回一个数字的绝对值。参数可以是整形或者浮点型。如果参数是一个复数,则返回其大小。
input_password=b'mysecretpassword'input_hashed_password=hashlib.sha256(input_password).hexdigest()ifinput_hashed_password==hashed_password:print("Password correct")else:print("Password incorrect") 网络安全工具进阶 1. 使用Scapy进行网络攻击与防御 ...
nargs - The number of command-line arguments that should be consumed nargs=2 表示包含两个值的参数列表 nargs=’*’ 表示任意个参数 nargs=’+’ 表示至少一个参数 default 默认值 type 参数的数值类型 choices 给定候选的值 required 是否为必须给定的参数 ...
.. versionchanged:: 1.0.0 Added caption and label arguments. .. versionchanged:: 1.2.0 Added position argument, changed meaning of caption argument. Parameters --- buf : str, Path or StringIO-like, optional, default None Buffer to write to. If None, the output is returned as ...