Sorting Out List Wild Card Using Regular Expression

[vfxkid]

using regular expreession i need to sort out the list using wild card with all the ref on one var and all the rest of the file on another var

everytime i query something with regular expression and print it i get numbers and weird letters how can i make that
information useful

list contains [cone.ma, cube.ma, cylinder.ma, ref1.ma, ref2.ma, refAll.ma, sphere.ma]
i would like to sort out all the ref*.ma in one var & cone cube cylinder etc in another var. #how would i do that.

[joojaa]

heres one naive way to skin the fish

CODE
import re
list=["cone.ma", "cube.ma", "cylinder.ma",
      "ref1.ma", "ref2.ma", "refAll.ma", "sphere.ma"]
var1=[item for item in list if re.match("ref.*",item)]
var2=[item for item in list if not re.match("ref.*",item)]
print var1,var2

Im not sure you need regular expressions at all snce you use no such thing

[vfxkid]

thanx, cool that works.
i also like the way you used item for item is that stack overflow?

[joojaa]

No just list comprehension.

[vfxkid]

another quick question. when i do a loop, is there any way to store the info outside the local scope of the loop

for example:

CODE
import re
list=["cone.ma", "cube.ma", "cylinder.ma",
      "ref1.ma", "ref2.ma", "refAll.ma", "sphere.ma"]
for i in list:
    if re.match("ref.*",i):
        store  = i
print store   #only prints out the last need the entire list.

[uiron]

it prints last value because you're storing last value only. if you want to store the list, then initialize array of values prior to loop
CODE
results = []
, inside the loop, append those values to array CODE
results.append(value)

[joojaa]

On this note since you refeered above that the match your looking for is ref* then you should consider using fnmatch instead of re

[joojaa]

Oh and by the way:

QUOTE
another quick question. when i do a loop, is there any way to store the info outside the local scope of the loop

Python does NOT scope the for loop in different scope than the outer function. Python strictly only has 2 types of scopes local and global. And local is function wide so everything you define in a loop IS visible after that loop, beware. Everything you ever define in fuction is visible everywhere else in teh function just as long as it comes after the initial definition.

[vfxkid]

cool thanks alot. fnmatch was the first option i tried but i got the same result because i
did not initilize variable with []. I thought python would do it automatically for some reason
without pre defining it.

[vfxkid]

another expression question. i am trying to open and sort a ma file. my re.match kinda works but
keeps outputting four lines but i want it to sort only the string starting with file -r which are the last two on this
list and not file -rdi.

CODE
line is a list of string =[
file -rdi 1 -ns "cylinder" -rfn "cylinderRN" "C:/Documents and Settings/My Documents/Production/testRef/cylinder.ma";,

file -rdi 1 -ns "sphere" -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";,

file -r -ns "cylinder" -dr 1 -rfn "cylinderRN" "C:/Documents and Settings/My Documents/Production/testRef/cylinder.ma";,

file -r -ns "sphere" -dr 1 -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";,
]
#there are other lines in the list too.  my re expression sorted it down to four.  

myString = string.join(line, '' )
            if (re.match("file\s+-r.",myString)):  # cant make it stop at 'file -r '
                print myString
            else:
                None

[joojaa]

QUOTE
another expression question

regular expressions, expression means something different

CODE
import string
import re

lines="""file -rdi 1 -ns "cylinder" -rfn "cylinderRN" "C:/Documents and Settings/My Documents/Production/testRef/cylinder.ma";
file -rdi 1 -ns "sphere" -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";
file -r -ns "cylinder" -dr 1 -rfn "cylinderRN" "C:/Documents and Settings/My Documents/Production/testRef/cylinder.ma";
file -r -ns "sphere" -dr 1 -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";"""
for line in lines.split("\n"):
  match=re.match(""".(-r )./(.*)";""",line)
  if match:
    print match.group(2)

Note: theres a space after -r in the code, im preemptivating a bit because i can see where this is going, you want the filenames right?

PS: Why would you bother to recreate grep?

[vfxkid]

eventually i would have liked the file name. The expression you used was amazing. i was going to use a much longer
route by first using expression to sort out the two file -r lines then used another expression to get the path C:\ of the location of the files. This would have been in two steps.

i did not understand how this expression worked could you explain.

CODE
match(""".(-r )./(.*)";""",line)

print match.group(2)   #?

tanx
you rock Joojaa

[joojaa]

""" =start a quote (thisway i dont nee need to expand " with \" makes it easier to read)

So now the regexp looks like this:

.(-r )./(.*)";

.=any character
*any amount
() group

Ok soe it reads find any amount of character up untill -r space then find any amount of any characters that ends with / then take a group of anything that is ending with ";

Now threes a trick:

.* if greedy (a nongreedy variant looks like this .?), which means if you have the affronted ./ it goes ahead and matches the whole rest of the string and starts going backwards for example:

a/b/c/d

it goes ahead and does something like this:

take all, does that have a / after it, nope. Well lets take a/b/c/ does that have / after it, nope. Erll howabout a/b/c is it followed by / yes. ok so thats it im done.

Groups of () go into matches so group 0 is the whole match if any 1 is the first () group 2 is the second 3 is the third an so on.

[joojaa]

but yes we can find those other things you were interested with too:

CODE
import string
import re
lines="""file -rdi 1 -ns "cylinder" -rfn "cylindercylinderRN" "cylindercylinderRNC:/Documents and Settings/My Documents/Production/testRef/cylinder.ma"ma;
file -rdi 1 -ns "sphere" -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";
file -r -ns "cylinder" -dr 1 -rfn "cylinderRN" "C:/Documents and Settings/My Documents/Production/testRef/cylinder.ma";
file -r -ns "sphere" -dr 1 -rfn "sphereRN" "C:/Documents and Settings/My Documents/Production/testRef/sphere.ma";"""
for line in lines.split("\n"):
  match=re.match(""".(-r )."(.:)(./)(.)";""",line)
  if match:
    print match.group(2,3,4)

possibly:
CODE
for line in lines.split("\n"):
  match=re.match(""".(-r )."(.*)";""",line)
  if match:
    print match.group(2).split("/")