Regular Expressions

Question 1

What module function is used to find a regex pattern to match?

Answer 1

Question 2

A function used to find the first location of regex pattern.

Answer 2

Question 3

How to display the matched regex pattern?

Answer 3

Question 4

If you want to separate the regex pattern into different objects. What would you use?

Answer 4

Use parentheses.

Question 5

A function used to print the first object of a regex pattern.

Answer 5

Question 6

A function used to print multiple regex objects in a tuple.

Answer 6

Question 7

This technique assigns the two values in the tuple into the two variables.

Answer 7

Question 8

Code for finding the first instance of a phone number split it into 2 different objects

Answer 8

Question 9

What do you need to match any of these special characters?
. ^ $ * + ? { } [ ] \ | ( )

Answer 9

Question 10

If we want to search for the first group of a regex object. If not found move to the 2nd group, we would use what?

Answer 10

The pipe (|)

Question 11

Code a regex object that looks for the string “Batman” as the first choice. If not found, then search for the string “Tina Fey”.

Answer 11

Question 12

What character would you use to make a group an optional part of the search pattern?

Answer 12

The question mark (?)

Question 13

Code a regex pattern that makes the string “wo” optional in the word “Batman”?

Answer 13

Question 14

What character would you use to match a group ZERO or more times?

Answer 14

Star or asterisk (*)

Question 15

Code a regex pattern that allows us to match the “wo” string inside of “Batman” zero or more times.

Answer 15

Question 16

What character would you use to match a group ONE or more times?

Answer 16

Plus sign (+)

Question 17

Code a regex pattern where the string “wo” inside of “Batman” has to be found at least once.

Answer 17

Question 18

Code that specifies the group (Ha) should be matched exactly 3 times.

Answer 18

Question 19

What character would you use to specify how many times a group should appear for it to be a match?

Answer 19

Brackets {}

Question 20

Code that specifies the group (Ha) should be matched between 3 to 5 times.

Answer 20

Question 21

Code that specifies the group (Ha) should be matched 3 times and beyond.

Answer 21

Question 22

By default, Python regular expressions are greedy. What does this mean?

Answer 22

They match the longest string possible.

Question 23

Given the regex pattern r”(Ha){3,5}” Python will search for what number?

Answer 23

5, because it’s greedy by default and this is the highest number in the range.

Question 24

Given the regex pattern r”(Ha){3,5}?” Python will search for what number?

Answer 24

3, the question mark makes this expression non-greedy. So, it matches with the shortest number in the range.

Question 25

What character do we use to make a range non-greedy?

Answer 25

Question mark (?)

Question 26

What method do we use to match all regular expression objects?

Answer 26

.findall()

Question 27

Code that matches the regex pattern for all phone numbers in a text and places them in a list.

Answer 27

Question 28

Code that matches the regex pattern for all phone numbers, digits broken into 3 groups. Resulting in the matched groups placed into a list of tuples.

Answer 28

Question 29

Shorthand character class that represents any numeric digit from 0 to 9.

Answer 29

\d

Question 30

Shorthand character class that represents any character that is NOT a numeric digit from 0 to 9.

Answer 30

\D

Question 31

Shorthand character class that represents any letter, numeric digit, or underscore character. (Think matching ”word” characters)

Answer 31

\w

Question 32

Shorthand character class that represents any character NOT a letter, numeric digit, or underscore.

Answer 32

\W

Question 33

Shorthand character class that represents any space, tab, or newline character. (Think matching space)

Answer 33

\s

Question 34

Shorthand character class that represents any character NOT a space, tab, or newline.

Answer 34

\S

Question 35

What can you do to match a set of specific characters? And shorthand characters are too broad?

Answer 35

Create character class.

Question 36

What’s a character class for matching all upper/lower letters and numbers?

Answer 36

Question 37

What’s a character class for matching all vowels (upper/lower)?

Answer 37

Question 38

What’s a negative character class? And it’s symbol?

Answer 38

We match all characters NOT in a character class. Represented by a caret (^) in front of the character class.

Question 39

What’s a character class for matching all characters NOT vowel characters (upper/lower)?

Answer 39

Question 40

What character do you use to indicate that a match must occur at the beginning of a regex pattern?

Answer 40

Caret (^)

Question 41

What character do you use to indicate that a match must occur at the end of a regex pattern?

Answer 41

Dollar sign ($)

Question 42

Code for finding a word that starts with Hello.

Answer 42

Question 43

Code for finding a word that ends with a number.

Answer 43

Question 44

What character do you use to match any one character? (except for Newline)

Answer 44

Dot (.)

Question 45

Code for finding a word that ends in “at” and with one character in front.

Answer 45

Question 46

How would you make the dot-star which by default is greedy, non-greedy?

Answer 46

Question mark (?) ie .*?

Question 47

What character do you use to match any character (except for newline)?

Answer 47

The dot-star (.*)

Question 48

Code for matching any group after the First and Last name.

Answer 48

Question 49

Code for matching the first group object after the First and Last name (non-greedy).

Answer 49

Question 50

How would one match everything with the dot character including the newlines?

Answer 50

Question 51

How would you match a word regardless of whether it’s uppercase/lowercase letters?

Answer 51

Question 52

The method used for finding a regex pattern and substituting it with another one.

Answer 52

sub()

Question 53

Write code substituting any word after “Agent” with the word “CENSORED”.

Answer 53

Question 54

Write code censoring the name of the Agents by showing their first initials.

Answer 54

Question 55

What command would we use to spread regular expression patterns over multiple lines with comments inside of the compile() function?

Answer 55

re.VERBOSE

Question 56

What’s the workaround for using multiple commands at the same time inside of the compile() function?

Answer 56

The pipe (|)