[英]Using append() and readline for completion in python
Specifically can I provide append() a Null/None value in Python? 具体来说,我可以在Python中提供append()Null / None值吗?
I am trying to add auto complete functionality to a command line application, so am using readline to obtain anything the user may have typed at the raw_input prompt. 我试图将自动完成功能添加到命令行应用程序,因此要使用readline获取用户可能在raw_input提示符下键入的任何内容。
I'm getting an issue when I try to tab (with no value entered into the console) and get this message: "append() takes exactly one argument (0 given)" 当我尝试使用Tab键(未在控制台中输入任何值)并收到此消息时,我遇到了一个问题:“ append()恰好带有一个参数(给定0)”
Here is the code: 这是代码:
tokens = readline.get_line_buffer().split()
if not tokens or readline.get_line_buffer()[-1] == ' ':
tokens.append()
I'm using the example provided here because of the traverse function where the depth of the tree isn't an issue: https://www.ironalbatross.net/wiki/index.php5?title=Python_Readline_Completions#Complex_problem_.28Regular_Grammar.29 我使用此处提供的示例是因为遍历功能不影响树的深度: https : //www.ironalbatross.net/wiki/index.php5?title=Python_Readline_Completions#Complex_problem_.28Regular_Grammar.29
append require exactly one argument 追加仅需要一个参数
None object can't invoke append function 没有对象不能调用附加函数
OK I managed to fix it... wasn't sure what value to provide append() when there was no value returned by readline so did this and it worked: 好的,我设法解决了这个问题……不确定readline没有返回值时提供什么值append(),这样做是可行的:
def complete(self,text,state):
try:
tokens = readline.get_line_buffer().split()
if not tokens or readline.get_line_buffer()[-1] == ' ':
tokens.append(text)
Thanks guys! 多谢你们!
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