Regex: Attributeerror: 'Nonetype' Object Has No Attribute 'Groups'

Regex: AttributeError: 'NoneType' object has no attribute 'groups'

import re

htmlString = '</dd><dt> Fine, thank you. </dt><dd> Molt bé, gràcies. (<i>mohl behh, GRAH-syuhs</i>)'

SearchStr = '(\<\/dd\>\<dt\>)+ ([\w+\,\.\s]+)([\&\#\d\;]+)(\<\/dt\>\<dd\>)+ ([\w\,\s\w\s\w\?\!\.]+) (\(\<i\>)([\w\s\,\-]+)(\<\/i\>\))'

Result = re.search(SearchStr.decode('utf-8'), htmlString.decode('utf-8'), re.I | re.U)

print Result.groups()

Works that way. The expression contains non-latin characters, so it usually fails. You've got to decode into Unicode and use re.U (Unicode) flag.

I'm a beginner too and I faced that issue a couple of times myself.

Python regex AttributeError: 'NoneType' object has no attribute 'group'

I managed to figure out this solution: omit group() for the situation where the searchbox reply is "No results" and thus doesn't match the Regex.

try:
    searchbox_result = re.match("^.*(?=(\())", searchbox).group()
except AttributeError:
    searchbox_result = re.match("^.*(?=(\())", searchbox)

AttributeError: 'NoneType' object has no attribute 'group' ,

The method re.match(..) returns Match object (which has .group(x) methods and etc) or None in case if the match was not found. In your case the error means that was returned None ;)

Ok, it means that regex pattern doesn't work for the data tested. I've debugged your both cases and I've been noticed that in the first script you apply the pattern to is "flash:c2900- but in the second example you are testing the regex against file is \"flash:/c2900 where between flash: and c2900 we have an extra / which doesn't exist in the first example.

Ok, so there are 2 ways to fix it - if you want to work it with and without / using the same regex, it will be this way

import re

output = 'System image file is "flash:c2900-universalk9-mz.SPA.156-3.M6.bin"'
print(re.search(r'"flash:/?(.*)"', output).group(1))

output = 'System image file is "flash:/c2900-universalk9-mz.SPA.156-3.M6.bin"'
print(re.search(r'"flash:/?(.*)"', output).group(1))

using optional regex matching (?).

If you want to work only with / or without you can use these examples.

import re

output = 'System image file is "flash:c2900-universalk9-mz.SPA.156-3.M6.bin"'
print(re.search(r'"flash:(.*)"', output).group(1))

output = 'System image file is "flash:/c2900-universalk9-mz.SPA.156-3.M6.bin"'
print(re.search(r'"flash:/(.*)"', output).group(1))

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

'NoneType' object has no attribute 'group' appears when your regex has not matched anything inside the provided input string, because the match object is None, not initialized, the .group() is None.

The \d\d-\d\d pattern will only match 28-31 in 28-31 34TH ST, -\s\d\d will only match - 21 in 217- 219 EASTERN PARKWAY, and \d\s-\d will match 1 -3 and 9 -2 in 1 -3 JANE STREET and 219 -223 78TH STREET.

To match the initial digits with a hyphen, you can use

^\d+\s*-\s*\d+

See the regex demo

In code, you can use re.match to match in the beginning of a string rather than use ^ with re.search:

if row['address']:                                    # Check if address is present
    add = re.match(r'\d+\s*-\s*\d+', row['address'])  # Run the regex
    if add:                                           # Regex matched?
        print(add.group())                            # Print the match value

Regular expressions in Python - AttributeError: 'NoneType' object has no attribute 'group'

your search is returning None. Try this instead :

path = '/my_path'
for file in os.listdir(path):
    if file.startswith("first"):
        print file + '\n'

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