math.group error from regex tuples in python

Question

I want to be able to manipulate the results of this regex and match it into groups so I can manipulate it. I get an error that says:

AttributeError: 'list' object has no attribute 'group'

My code is as follows:

sampleText= 'LOC OL85M132 LOC OL3M051'
matchLOC=re.findall(r'(LOC)\s([^\W\d_]{2})(\d+)M(\d{3})',sampleText)
for i in matchLOC:
     print(i)

My result with this is:

('LOC', 'OL', '85', '132')
('LOC', 'OL', '3', '051')

This is fine but when I try and assign the groups to variables like:

MP=matchLoc.group(2)
Yards=matchLoc.group(3)

I get that error above. I want to:

1) Assign the third group to a variable 'MP'

2) Assign the fourth group to variable 'Yards'

From here on I would then like to do a series of manipulations. eg add the digit 0 to the end of the last number and also if-else loops such as

if Yards >= 130:
   print('Yards = ' + str(int(Yards)-100))
   print('MP = ' + str(int(MP) + 0.5))

and so on.

Wiktor Stribiżew · Accepted Answer · 2015-08-24 12:33:04Z

1

Here is how you can do it with re.finditer:

import re
sampleText= 'LOC OL85M132 LOC OL3M051'
for m in re.finditer(r'(LOC)\s([^\W\d_]{2})(\d+)M(\d{3})',sampleText):
    #print (m.group(3) + " : " + m.group(4))
    MP = int(m.group(3))
    Yards = int(m.group(4))
    if Yards >= 130:
        print('Yards = ' + str(Yards-100))
        print('MP = ' + str(MP + 0.5))

See IDEONE demo

I have not modified your regex, but I see no point in capturing (LOC) since it is known text. Note that modifying the capturing groups, you will shift the group ids and you will need to revise the whole code. That's why I kept it as in the original code.

answered Aug 24, 2015 at 12:33

Wiktor Stribiżew

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3 Comments

Hussein Farah Over a year ago

Your solution only does it for one of them not both? I needed an output similar to eg LOC OL85M132 MP=X Yards=Y and then next line LOC OL3M051 MP=X Yards=Y. Thanks for the help by the way. Appreciate it (y)

Wiktor Stribiżew Over a year ago

In the second match, Yards < 130. Uncomment the commented line to see that the regex is working correctly.

Hussein Farah Over a year ago

Yeah man thanks. Ill test it out, but for the time being this seems good.

scytale · Accepted Answer · 2015-08-24 12:23:31Z

0

re.finall():

Return a list of all non-overlapping matches in the string.

you probably want :

for _, _, mp, yards in matchLOC:
    yards = int(yards)
    if yards >= 130:
       ...

edited Aug 24, 2015 at 12:23

answered Aug 24, 2015 at 12:05

scytale

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3 Comments

Hussein Farah Over a year ago

But then I just get this AttributeError: 'tuple' object has no attribute 'group'

scytale Over a year ago

apologies - I mis-remembered the return format for findall() - does the updated answer do what you need?

Hussein Farah Over a year ago

Sorry could you just explain that. I'm just beginning out with python.

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