How do I access classes and get a dir() of available actions?

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I have been trying to get access to available functions for a Match Object from re.search. I am looking for a way to do that similar to how I could do dir(str) and I can find .replace.

This is my dir() for the re module and some of the things I have tried:

>>> import re
>>> m = re.search('x', 'x')
>>> dir(re)
['DEBUG', 'DOTALL', 'I', 'IGNORECASE', 'L', 'LOCALE', 'M', 'MULTILINE', 
'S', 'Scanner', 'T', 'TEMPLATE', 'U', 'UNICODE', 'VERBOSE', 'X', 
'_MAXCACHE', '__all__', '__builtins__', '__doc__', '__file__', '__name__', 
'__package__', '__version__', '_alphanum', '_cache', '_cache_repl', 
'_compile', '_compile_repl', '_expand', '_locale', '_pattern_type', 
'_pickle', '_subx', 'compile', 'copy_reg', 'error', 'escape', 'findall', 
'finditer', 'match', 'purge', 'search', 'split', 'sre_compile', 
'sre_parse', 'sub', 'subn', 'sys', 'template']

I want to get to this menu without having to create the Match Object:

>>> dir(m)
['__class__', '__copy__', '__deepcopy__', '__delattr__', '__doc__', 
'__format__', '__getattribute__', '__hash__', '__init__', '__new__', 
'__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', 
'__str__', '__subclasshook__', 'end', 'endpos', 'expand', 'group', 
'groupdict', 'groups', 'lastgroup', 'lastindex', 'pos', 're', 'regs', 
'span', 'start', 'string']

Is there a way to go from dir(m) and be able to find out how to go up a level? That way I can trace my way back to the module and functions. Like if I was to do dir(re.search.func_dict), how can I find out what I need to type into dir() to get back a list that included func_dict()?

>>> dir(re.Match)
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'Match'

I see this thing about _sre.SRE._Match but how do I found out where that lives so I can get more information on it?

>>> locals()
{'__builtins__': <module '__builtin__' (built-in)>, 'm': <_sre.SRE_Match 
object at 0xb7b0d8a8>, '__package__': None, 're': <module 're' from 
'/usr/lib/python2.7/re.pyc'>, '__name__': '__main__', '__doc__': None}

I have tried to use the inspect function, but the only function that gives me any info is inspect.getmembers(re) but it's just a ton of stuff I don't understand.

I am a complete newbie following a learn as you program course and I have no bases knowledge in Python other than some programs I have written. I have been trying to use dir() and help() a lot to learn. I greatly appreciate your help.

In Python 3.7, re.Match is the type of the objects returned by re.match. See bpo30397.

In previous versions, re.Match is not defined. If you wanted a reference to the type of match objects you could get it with

Match = type(re.match('',''))

You can use dir on either the Match type or on a match object to list its attributes and methods.

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This is the closest thing I have gotten so far:

>>> import re, inspect

>>> inspect.getmembers(re,inspect.isclass)
[('Scanner', <class re.Scanner at 0xb7b7bcec>), ('_pattern_type', <type 
'_sre.SRE_Pattern'>), ('error', <class 'sre_constants.error'>)]

>>> from re import _pattern_type

>>> dir(_pattern_type)
['__class__', '__copy__', '__deepcopy__', '__delattr__', '__doc__', '__format__', 
'__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', 
'__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'findall', 
'finditer', 'flags', 'groupindex', 'groups', 'match', 'pattern', 'scanner', 'search', 
'split', 'sub', 'subn']

Directory Class (System.IO), Class C1—Discretionary Access Protection At the C1 class, users have the also audit actions of the user to record what actions have been taken and by whom. each object (e.g., file, directory, or network connection) must also have a label  A class is a data structure that combines state (fields) and actions (methods and other function members) in a single unit. A class provides a definition for dynamically created instances of the class, also known as objects. Classes support inheritance and polymorphism, mechanisms whereby derived classes can extend and specialize base classes.

So apparently _sre is a C-extension so SRE_Match is defined within this C-file

Where can I find the _sre.py python built-in module?

https://hg.python.org/cpython/file/2.7/Modules/_sre.c

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Comments
  • dir(re.Match) won't work because match is lowercase. It's a typo. Works fine with dir(re.match)
  • I don't want the function re.match, I was trying to get to a Match object I guess following someone else's advice for a similar problem. I guess I meant more re.MatchObject
  • I've just seen that advice and am about to comment on it
  • There is a boring old method to find this info - it’s called reading the documentation, e.g. for Python 2.7 docs.python.org/2/library/re.html. Reading documentation is a good habit to get into because you will often learn about more than the particular thing you are looking for. Also it is quicker - you will waste a lot less of your valuable time, and ours - and you get less sarcasm than when asking questions here which are covered by widely accessible and totallu searchable documentation which can easily be located on a popular search engine and some carefully selected search terms.
  • Is there a reason you aren't using the online documentation?
  • That makes sense, I like how the ink says "that represent the types of compiled regular expression objects and match objects". That is essentially what I was searching for and it was driving me nuts that I could use inspect and gc and globals() and kept seeing _sre_SRE_Match object over and over again and in errors, but I could never pinpoint where these mystical objects are. I still don't know much about objects too so I figured that was it. I noticed when I did help(m), where m is my created match, it would say object at the top and talk about the class. I have a lot to learn.