AttributeError: 'IPCompleter' object has no attribute 'custom_completers'

[Carreau]

We seem to set it in interactiveshell.py, but it shoudl likely handle the case when it does not exists,
and should be wrapped in setters/getters.

In [1]: from IPython.core.completer import IPCompleter

In [2]: c = IPCompleter(get_ipython())

In [3]: c.complete('foo')
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-3-1faa54daaabd> in <module>()
----> 1 c.complete('foo')

/Users/bussonniermatthias/dev/ipython/IPython/core/completer.py in complete(self, text, line_buffer, cursor_pos)
   1182         # Start with a clean slate of completions
   1183         self.matches[:] = []
-> 1184         custom_res = self.dispatch_custom_completer(text)
   1185         if custom_res is not None:
   1186             # did custom completers produce something?

/Users/bussonniermatthias/dev/ipython/IPython/core/completer.py in dispatch_custom_completer(self, text)
   1094         # for foo etc, try also to find completer for %foo
   1095         if not cmd.startswith(self.magic_escape):
-> 1096             try_magic = self.custom_completers.s_matches(
   1097                 self.magic_escape + cmd)
   1098         else:

AttributeError: 'IPCompleter' object has no attribute 'custom_completers'

[minrk]

It should probably be declared on the class so it's always defined

[Carreau]

It should probably be declared on the class so it's always defined

Yes, I just leave an easy open bug that does not bother anyone for a new contributor !

[ghost]

@Carreau sir, i tried something, is this valid, i commented the line in __init__ of IPCompleter object i.e.,
self.custom_completers = None
and it gave the following result.

In [1]: from IPython.core.completer import IPCompleter

In [2]: c = IPCompleter(get_ipython())

In [3]: c.complete('foo')

In [4]:

the error disappeared, i thought that custom_completers object is being instantiated in the parent class of Completer,because in interactiveshell.py ,

  # Add custom completers to the basic ones built into IPCompleter
        sdisp = self.strdispatchers.get('complete_command', StrDispatch())
        self.strdispatchers['complete_command'] = sdisp
        self.Completer.custom_completers = sdisp

here custom_completers object is being instantiated. I am assuming that Interactiveshell.py will run first. I am a beginner , please review and help me with this, thank you.

[Carreau]

Note, this has (partially been already fixed by #9487) but it now raises the following:

In [1]: from IPython.core.completer import IPCompleter

In [2]: c = IPCompleter(get_ipython())

In [3]: c.complete('foo')
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/Users/bussonniermatthias/dev/ipython/IPython/core/completer.py in complete(self, text, line_buffer, cursor_pos)
   1203                 for matcher in self.matchers:
   1204                     try:
-> 1205                         self.matches.extend(matcher(text))
   1206                     except:
   1207                         # Show the ugly traceback if the matcher causes an

/Users/bussonniermatthias/dev/ipython/IPython/core/completer.py in python_matches(self, text)
    800                 matches = []
    801         else:
--> 802             matches = self.global_matches(text)
    803         return matches
    804

/Users/bussonniermatthias/dev/ipython/IPython/core/completer.py in global_matches(self, text)
    356         for lst in [keyword.kwlist,
    357                     builtin_mod.__dict__.keys(),
--> 358                     self.namespace.keys(),
    359                     self.global_namespace.keys()]:
    360             for word in lst:

AttributeError: 'IPCompleter' object has no attribute 'namespace'
Out[3]: ('foo', [])

That might be the reason why @thesageinpilani does not see the same error.

Can you check that when you are on master you see the above error ?

[ghost]

yes sir, i see the same error

[srinivasreddy]

@Carreau
Looks like this has been fixed. Let's close this.
on master,

In [1]: from IPython.core.completer import IPCompleter

In [2]: c = IPCompleter(get_ipython())

In [3]: c.complete('foo')
Out[3]: ('foo', [])

In [4]: 

[takluyver]

Thanks