Python String Methods

Question 1

capitalize()

Answer 1

The capitalize() method returns a string where the first character is upper case.

str.capitalize()

txt = "hello, and welcome to my world."
x = txt.**capitalize**()

Question 2

casefold()

Answer 2

The casefold() method returns a string where all the characters are lower case.

string.casefold()

txt = "Hello, And Welcome To My World!"
x = txt.**casefold**()

Question 3

center()

Answer 3

The center() method will center align the string, using a specified character (space is default) as the fill character.

string.center(length, character)

txt = "banana"
x = txt.**center**(20)

Question 4

count()

Answer 4

The count() method returns the number of times a specified value appears in the string.

string.count(value, start, end)

txt = "I love apples, apple are my favorite fruit"
x = txt.**count**("apple")

Question 5

encode()

Answer 5

The encode() method encodes the string, using the specified encoding. If no encoding is specified, UTF-8 will be used.

string.encode(encoding=encoding, errors=errors)

txt = "My name is Ståle"
x = txt.**encode**()

Question 6

endswith()

Answer 6

The endswith() method returns True if the string ends with the specified value, otherwise False.

string.endswith(value, start, end)

txt = "Hello, welcome to my world."
x = txt.**endswith**(".")

Question 7

expandtabs()

Answer 7

The expandtabs() method sets the tab size to the specified number of whitespaces.

string.expandtabs(tabsize)

txt = "H\te\tl\tl\to"
x = txt.**expandtabs**(2)

Question 8

find()

Answer 8

The find() method finds the first occurrence of the specified value.

The find() method returns -1 if the value is not found.

string.find(value, start, end)

txt = "Hello, welcome to my world."
x = txt.**find**("welcome")

Question 9

format()

Answer 9

The format() method formats the specified value(s) and insert them inside the string’s placeholder.

string.format(value1, value2…)

txt = "For only {price:.2f} dollars!"
print(txt.**format**(price = 49))

Question 10

format_map()

Answer 10

Formats specified values in a string

Question 11

index()

Answer 11

The index() method finds the first occurrence of the specified value.

string.index(value, start, end)

txt = "Hello, welcome to my world."
x = txt.**index**("welcome")

Question 12

isalnum()

Answer 12

The isalnum() method returns True if all the characters are alphanumeric, meaning alphabet letter (a-z) and numbers (0-9).

string.isalnum()

txt = "Company12"
x = txt.**isalnum**()

Question 13

isalpha()

Answer 13

The isalpha() method returns True if all the characters are alphabet letters (a-z).

string.isalpha()

txt = "CompanyX"
x = txt.**isalpha**()

Question 14

isdecimal()

Answer 14

The isdecimal() method returns True if all the characters are decimals (0-9).

string.isdecimal()

txt = "\u0033" #unicode for 3
x = txt.**isdecimal**()

Question 15

isdigit()

Answer 15

The isdigit() method returns True if all the characters are digits, otherwise False.

string.isdigit()

txt = "50800"
x = txt.**isdigit**()

Question 16

isidentifier()

Answer 16

The isidentifier() method returns True if the string is a valid identifier, otherwise False.

string.isidentifier()

txt = "Demo"
x = txt.**isidentifier**()

Question 17

islower()

Answer 17

The islower() method returns True if all the characters are in lower case, otherwise False.

string.islower()

txt = "hello world!"
x = txt.**islower**()

Question 18

isnumeric()

Answer 18

The isnumeric() method returns True if all the characters are numeric (0-9), otherwise False.

string.isnumeric()

txt = "565543"
x = txt.**isnumeric**()

Question 19

isprintable()

Answer 19

The isprintable() method returns True if all the characters are printable, otherwise False.

string.isprintable()

txt = "Hello!\nAre you #1?"
x = txt.**isprintable**()

Question 20

isspace()

Answer 20

The isspace() method returns True if all the characters in a string are whitespaces, otherwise False.

string.isspace()

txt = " "
x = txt.**isspace**()

Question 21

istitle()

Answer 21

The istitle() method returns True if all words in a text start with a upper case letter, AND the rest of the word are lower case letters, otherwise False.

string.istitle()

txt = "Hello, And Welcome To My World!"
x = txt.**istitle**()

Question 22

isupper()

Answer 22

The isupper() method returns True if all the characters are in upper case, otherwise False.

string.isupper()

txt = "THIS IS NOW!"
x = txt.**isupper**()

Question 23

join()

Answer 23

text = [‘Python’, ‘is’, ‘a’, ‘fun’, ‘programming’, ‘language’] “ “.join(text)

‘Python is a fun programming language’

Question 24

ljust()

Answer 24

The ljust() method will left align the string, using a specified character (space is default) as the fill character.

string.ljust(length, character)

txt = “banana”

x = txt.ljust(20)
print(x, “is my favorite fruit.”)

Question 25

**lower()**

Answer 25

The lower() method returns a string where all characters are lower case. *string.lower()* txt = "Hello my FRIENDS" x = txt.**lower**() print(x)

Question 26

**lstrip()**

Answer 26

The lstrip() method removes any leading characters (space is the default leading character to remove) *string.lstrip(characters)* txt = " banana " x = txt.**lstrip**() print("of all fruits", x, "is my favorite")

Question 27

**maketrans()**

Answer 27

The maketrans() method returns a mapping table that can be used with the translate() method to replace specified characters. *string.maketrans(x, y, z)* txt = "Hello Sam!" mytable = txt.**maketrans**("S", "P") print(txt.translate(mytable))

Question 28

**partition()**

Answer 28

The partition() method searches for a specified string, and splits the string into a tuple containing three elements. *string.partition(value)* txt = "I could eat bananas all day" x = txt.**partition**("bananas") print(x)

Question 29

**replace()**

Answer 29

The replace() method replaces a specified phrase with another specified phrase. *string.replace(oldvalue, newvalue, count)* txt = "I like bananas" x = txt.**replace**("bananas", "apples") print(x)

Question 30

**rfind()**

Answer 30

The rfind() method finds the last occurrence of the specified value. The rfind() method returns -1 if the value is not found. The rfind() method is almost the same as the rindex() method. See example below. string.rfind(value, start, end) ``` txt = "Mi casa, su casa." x = txt.**rfind**("casa") ```

Question 31

**rindex()**

Answer 31

The rindex() method finds the last occurrence of the specified value. The rindex() method raises an exception if the value is not found. The rindex() method is almost the same as the rfind() method. See example below. *string.rindex(value, start, end)* ``` txt = "Mi casa, su casa." x = txt.**rindex**("casa") ```

Question 32

**rjust()**

Answer 32

The rjust() method will right align the string, using a specified character (space is default) as the fill character. *string.rjust(length, character)* txt = "banana" x = txt.**rjust**(20) print(x, "is my favorite fruit.")

Question 33

**rpartition()**

Answer 33

The rpartition() method searches for the last occurrence of a specified string, and splits the string into a tuple containing three elements. *string.rpartition(value)* txt = "I could eat bananas all day, bananas are my favorite fruit" x = txt.**rpartition**("bananas") print(x)

Question 34

**rsplit()**

Answer 34

The rsplit() method splits a string into a list, starting from the right. *string.rsplit(separator, maxsplit)* txt = "apple, banana, cherry" x = txt.**rsplit**(", ") print(x)

Question 35

**split()**

Answer 35

The split() method splits a string into a list. *string.split(separator, maxsplit)* txt = "welcome to the jungle" x = txt.**split**() print(x)

Question 36

**splitlines()**

Answer 36

The splitlines() method splits a string into a list. The splitting is done at line breaks. string.splitlines(keeplinebreaks) txt = "Thank you for the music\nWelcome to the jungle" x = txt.**splitlines**() print(x)

Question 37

**startswith()**

Answer 37

The startswith() method returns True if the string starts with the specified value, otherwise False. *string.startswith(value, start, end)* txt = "Hello, welcome to my world." x = txt.**startswith**("Hello") print(x)

Question 38

**strip()**

Answer 38

The strip() method removes any leading (spaces at the beginning) and trailing (spaces at the end) characters *string.strip(characters)* txt = " banana " x = txt.**strip**() print("of all fruits", x, "is my favorite")

Question 39

**swapcase()**

Answer 39

The swapcase() method returns a string where all the upper case letters are lower case and vice versa. *string.swapcase()* txt = "Hello My Name Is PETER" x = txt.**swapcase**() print(x)

Question 40

**title()**

Answer 40

The title() method returns a string where the first character in every word is upper case. Like a header, or a title. *string.title()* txt = "Welcome to my world" x = txt.**title**() print(x)

Question 41

The translate() method returns a string where some specified characters are replaced with the character described in a dictionary, or in a mapping table. *string.translate(table)* ``` #use a dictionary with ascii codes to replace 83 (S) with 80 (P): mydict = {83: 80} ```

Answer 41

mydict = {83: 80} txt = "Hello Sam!" print(txt.**translate**(mydict))

Question 42

**upper()**

Answer 42

The upper() method returns a string where all characters are in upper case. *string.upper()* txt = "Hello my friends" x = txt.**upper**() print(x)

Question 43

**zfill()**

Answer 43

The zfill() method adds zeros (0) at the beginning of the string, until it reaches the specified length. *string.zfill(len)* txt = "50" x = txt.**zfill**(10) print(x)