This question tests your ability to write a regular expression.
Set the variable pat to a regular expression that matches part numbers created according to the following sequence:
begins with the letters AT
followed by an optional letter F
followed by a two- or three-digit number
followed by zero or more of the letters B, Q or Z, in any order
a dash (-)
a one- or two-digit numberimport re
re.search( r'eifo|aaaa|kkkk', "abcdeifg zoo aaadvarkkkk") #.group(0)
<re.Match object; span=(20, 24), match='kkkk'>
pat=r'^ATF{0,1}\d{2,3}[BQZ]{0,}-[0-9]{1,2}'
import re
re.search(pat,'ATF22-2x')
<re.Match object; span=(0, 7), match='ATF22-2'>
Set the variable pat to a regular expression that matches part numbers created according to the following sequence:
a prefix of either JSM or CP
a single digit between 1 and 4
an optional letter S
the letter A
an optional letter H
a dash
the letters 12V or 24V
For example, re.search(pat,'JSM1SAH-12V') would return a match object but re.search(pat,'JSM1SAH-') would not.
import re
pat=r"(JSM|CP)[1-4]S{0,1}AH?-(12V|24V)"
re.search(pat,'JSM1SAH-')
Set the variable pat to a regular expression that matches a part number string created according to the following sequence:
the letters CSTCE
a 1- or 2-digit number
the letter M
one or two zeros (0 or 00)
the letter G or V
a 2-digit number
an optional letter C
the characters -R0
For example, re.search(pat,'CSTCE50M00G00C-R0') would return a match object but re.search(pat,'CSTCE50M0G00C-R00') would not.
A UK postcode consists of a sequence one to four alphanumeric characters, a space, one digit and two upper-case letters. For example, "EC1A 1BB". Set the variable pcre to a string containing a regular expression that matches UK postcodes.
pcre='[a-zA-Z0-9]{1,4} [0-9][A-Z]{2}'
import re
re.search(pcre,"EC1A 1BB")
<re.Match object; span=(0, 8), match='EC1A 1BB'>
An IP address consists of four numbers of between one and three digits separated by periods. For example, "10.0.0.1" or "192.168.1.1". Set the variable ipre to a regular expression that matches an IP address. Hint: note that a period in a regular expression matches any character.
import re
s="The s ab."
r=r'\sab'
m=re.search( r, s )
!dir
Volume in drive C is Local Disk
Volume Serial Number is 9AE0-64CC
Directory of C:\Users\Ed\SharedFolder\bcit\4653\notebooks\lectures
2022-05-18 02:10 PM <DIR> .
2022-05-18 02:10 PM <DIR> ..
2017-02-14 08:46 AM 1,045 .gitignore
2022-05-18 08:39 AM <DIR> .ipynb_checkpoints
2022-05-18 02:09 PM 604,439 00-Introduction.html
2017-02-14 08:46 AM 11,388 00-Introduction.ipynb
2022-05-18 02:09 PM 600,495 01-How-to-Run-Python-Code.html
2022-04-25 11:12 AM 6,952 01-How-to-Run-Python-Code.ipynb
2022-05-18 02:09 PM 629,922 02-Basic-Python-Syntax.html
2022-04-25 12:09 PM 16,130 02-Basic-Python-Syntax.ipynb
2022-05-18 02:09 PM 621,223 03-Semantics-Variables.html
2022-04-26 03:01 PM 13,067 03-Semantics-Variables.ipynb
2022-05-18 02:09 PM 648,937 04-Semantics-Operators.html
2022-04-27 10:56 AM 23,061 04-Semantics-Operators.ipynb
2022-05-18 02:09 PM 657,020 05-Built-in-Scalar-Types.html
2022-05-18 01:50 PM 17,299 05-Built-in-Scalar-Types.ipynb
2022-05-18 02:09 PM 655,379 06-Built-in-Data-Structures.html
2022-05-18 02:08 PM 22,545 06-Built-in-Data-Structures.ipynb
2022-05-18 02:09 PM 618,752 07-Control-Flow-Statements.html
2022-04-27 11:19 AM 11,130 07-Control-Flow-Statements.ipynb
2022-05-18 02:09 PM 636,526 08-Defining-Functions.html
2022-05-02 12:21 PM 14,112 08-Defining-Functions.ipynb
2022-05-18 02:09 PM 647,997 09-Errors-and-Exceptions.html
2022-05-02 12:21 PM 23,486 09-Errors-and-Exceptions.ipynb
2022-05-18 02:09 PM 655,291 10-Iterators.html
2022-05-04 11:19 AM 22,309 10-Iterators.ipynb
2022-05-18 02:09 PM 622,626 11-List-Comprehensions.html
2022-05-09 01:24 PM 11,736 11-List-Comprehensions.ipynb
2022-05-18 02:09 PM 637,538 12-Generators.html
2022-05-09 01:24 PM 15,019 12-Generators.ipynb
2022-05-18 02:09 PM 614,509 13-Modules-and-Packages.html
2022-05-06 09:47 AM 11,031 13-Modules-and-Packages.ipynb
2022-05-18 02:09 PM 731,935 14-Strings-and-Regular-Expressions.html
2022-05-16 04:14 PM 54,478 14-Strings-and-Regular-Expressions.ipynb
2022-05-18 02:09 PM 649,221 15-Preview-of-Data-Science-Tools.html
2017-02-14 08:46 AM 181,717 15-Preview-of-Data-Science-Tools.ipynb
2022-05-18 02:09 PM 595,587 16-Further-Resources.html
2017-02-14 08:46 AM 5,257 16-Further-Resources.ipynb
2022-05-18 02:10 PM 613,503 17-Figures.html
2017-02-14 08:46 AM 16,736 17-Figures.ipynb
2022-05-11 10:01 AM <DIR> 2022
2022-05-18 02:10 PM 612,735 Classes.html
2022-05-18 11:51 AM 8,876 Classes.ipynb
2022-05-16 09:20 AM 31 data.txt
2022-05-18 02:10 PM 595,085 DynamicTyping.html
2022-05-16 09:25 AM 2,338 DynamicTyping.ipynb
2017-02-14 08:46 AM <DIR> fig
2022-05-18 02:10 PM 595,946 FileIO.html
2022-05-16 04:14 PM 2,655 FileIO.ipynb
2022-05-18 02:10 PM 593,584 Index.html
2017-02-14 08:46 AM 3,708 Index.ipynb
2022-04-25 10:18 AM <DIR> lectures.2021
2017-02-14 08:46 AM 6,555 LICENSE
2022-05-11 10:01 AM <DIR> New folder
2022-05-18 02:10 PM 160 outdata.txt
2017-02-14 08:46 AM 4,648 README.md
2022-05-18 02:10 PM 596,275 Recursion.html
2022-05-18 11:51 AM 3,445 Recursion.ipynb
2022-05-11 09:15 AM 8,693 RegularExpressions.ipynb
2022-05-06 10:20 AM 11,617 Scope.ipynb
2022-05-18 11:51 AM 2,887 Scripts.ipynb
2022-05-18 11:51 AM 3,267 Sorting.ipynb
2017-02-14 08:46 AM <DIR> tools
2022-05-18 11:51 AM 6,194 Unicode.ipynb
2022-04-26 03:44 PM 1,670 Untitled.ipynb
57 File(s) 14,979,767 bytes
8 Dir(s) 50,280,349,696 bytes free