Regular Expressions 101

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"
IMEI.*>([0-9]+)<.*>([0-9]+)<.*>([0-9]+)<.*>([0-9]+)<.*td>(.+)<\/td>
"
gms
IMEI
matches the characters IMEI literally (case sensitive)
.
matches any character
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
1st Capturing Group
([0-9]+)
Match a single character present in the list below
[0-9]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
.
matches any character
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
2nd Capturing Group
([0-9]+)
Match a single character present in the list below
[0-9]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
.
matches any character
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
3rd Capturing Group
([0-9]+)
Match a single character present in the list below
[0-9]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
.
matches any character
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
> matches the character > with index 6210 (3E16 or 768) literally (case sensitive)
4th Capturing Group
([0-9]+)
Match a single character present in the list below
[0-9]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
.
matches any character
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
td>
matches the characters td> literally (case sensitive)
5th Capturing Group
(.+)
< matches the character < with index 6010 (3C16 or 748) literally (case sensitive)
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
td>
matches the characters td> literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
s modifier: single line. Dot matches newline characters
Your regular expression does not match the subject string.

Regular Expression
No Match

r"
"
gms

Test String