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Check if string follow a strict format via Regex Python [closed]

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I have a string that might have any of the following format (example) :
1111__1111
1111__1111_11
111_11A_11
I have added the following check :
import re
print(bool(re.match("\d__\d","1111_1111"))
print(bool(re.match("\d__\d_\d","1111_1111_11"))
print(bool(re.match("\d_\d[A-Za-z]_\d","111_11A_11"))
I don't think the regex is correct because when I introduce a character in the first regex for example it returns me True Always.
can you please point me to a solution?
Thank you

It returns True because the pattern is trying to find matches based on each one of the characters inside the pattern string.
The following regular expression finds exact matches for the three scenarios:
print(bool(re.match("(^\d{4}__\d{4}$)","1111__1111")))
print(bool(re.match("(^\d{4}\_\d{4}\_\d{2}$)","1111_1111_11")))
print(bool(re.match("(^\d{3}_\d{2}[A-Z]_\d{2}$)","111_11A_11")))

get certain word from string that located between undercore, [closed]

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This is one of the string that I got:
str ='_Name_ created _coordinates_ so that _CITIZENS_ would learn _colonisation_.'
what I want:
['Name', 'coordinates','CITIZENS','colonisation']
I'm trying to get word in string such as Name, coordinate, citizens, colonisation with their original case.
I tried split method to remove underscores and make them individual word.
,but it did not work well.
How can I do this?

Yo can use a regular expression for that:
import re
text ='_Name_ created _coordinates_ so that _CITIZENS_ would learn _colonisation_.'
re.findall('_(\w*)_', text)
Note str is a built python function, don't use for variable names

A regex should do the trick:
import re
s = '_Name_ created _coordinates_ so that _CITIZENS_ would learn _colonisation_.'
result = re.findall('_(\w+)_', s)

Extract Data Enclosed between three asterisks in python [closed]

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I want the data enclosed between three asterisks.And the Word should start with description.
For eg:I have data like
description ***tCore-DFON_P.17-18>dPLUC80115_S19P1>>><<<dPDCL80121_S17P1<100G.IPT.NTTA.SEA.ASE+PC1.LUC/PLD-SEA/PLD_100GEL064.263568***;
I want only
tCore-DFON_P.17-18>dPLUC80115_S19P1>>><<<dPDCL80121_S17P1<100G.IPT.NTTA.SEA.ASE+PC1.LUC/PLD-SEA/PLD_100GEL064.263568

You may use re.findall here:
inp = "description ***tCore-DFON_P.17-18>dPLUC80115_S19P1>>><<<dPDCL80121_S17P1<100G.IPT.NTTA.SEA.ASE+PC1.LUC/PLD-SEA/PLD_100GEL064.263568***;"
matches = re.findall(r'\bdescription\s+\*{3}(.*?)\*{3}', inp, flags=re.DOTALL)
print(matches)
This prints:
['tCore-DFON_P.17-18>dPLUC80115_S19P1>>><<<dPDCL80121_S17P1<100G.IPT.NTTA.SEA.ASE+PC1.LUC/PLD-SEA/PLD_100GEL064.263568']
Note that I use dot all mode in the regex, in case your expected matches might span across more than one line.

how to write regex to get only the users from this string output [closed]

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consider below the output of my subprocess module of python. Now from here I want to grab the very first username only like root ,daemon and continuew. I tried but not able to write the exact regex to fetch the users only .
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin

You do not a regex in the first place, as per your comments. So, you may iterate over the output line by line (str.splitlines()), split the line with : (str.split(':')) and take the first result (result[0]). This expects the output to be consistent, else it will fail.

Use split instead of regex
for line in output.split('\n'):
print line.split(':')[0]
>>>root
>>>daemon
....

Matching strings and extracting parts [closed]

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I've an issue here. I have a string and I want to extract parts of it using regex. Here is the string
{{name}} I love me some work {{hero}}
I want to extract
[{{name}}, {{hero}}]
also in a case where the string exist as
{{name} I love me some work {{hero, come in {here, this is right}
I still want to get
[{{name}, {{name, {here, right}]
I hope this makes sense. I am working with Python.

If you want ['{{name}}', '{{hero}}', '{{hero, come in {here, this is right}'] use #Avinash's regex.
If you want ['{{name}}', '{{hero}}', '{{hero', {here', 'right}'] use the following:
re.findall(r'{+\w+}*|{*\w+}+', s)
RegEX DEMO

Have you tried the following?
import re
s = '{{name} I love me some work {{hero, come in {here, this is right}'
print re.findall(r'\{.*?\}', s)