[Python tutorial] 20. String methods

string.capitalize()

Converts the first character to upper case

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

string.casefold()

Converts string into lower case

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

string.center(length, character)

Returns a centered string

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

string.count(value, start, end)

Returns the number of times a specified value occurs in a string

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

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

Returns an encoded version of the string

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

string.endswith(value, start, end)

Returns true if the string ends with the specified value

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

string.expandtabs(tabsize)

Sets the tab size of the string

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

string.find(value, start, end)

Searches the string for a specified value and returns the position of where it was found

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

string.format(value1, value2...)

Formats specified values in a string

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

string.index(value, start, end)

Searches the string for a specified value and returns the position of where it was found

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

string.isalnum()

Returns True if all characters in the string are alphanumeric

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

string.isalpha()

Returns True if all characters in the string are in the alphabet

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

string.isascii()

Returns True if all characters in the string are ascii characters

txt = "Company123"
x = txt.isascii()
print(x)

string.isdecimal()

Returns True if all characters in the string are decimals

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

string.isdigit()

Returns True if all characters in the string are digits

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

string.isidentifier()

Returns True if the string is an identifier

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

string.islower()

Returns True if all characters in the string are lower case

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

string.isnumeric()

Returns True if all characters in the string are numeric

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

string.isprintable()

Returns True if all characters in the string are printable

txt = "Hello! Are you #1?"
x = txt.isprintable()
print(x)

string.isspace()

Returns True if all characters in the string are whitespaces

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

string.istitle()

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

string.isupper()

Returns True if all characters in the string are upper case

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

string.join(iterable)

Converts the elements of an iterable into a string

myTuple = ("John", "Peter", "Vicky")
x = "#".join(myTuple)
print(x)

string.ljust(length, character)

Returns a left justified version of the string

txt = "banana"
x = txt.ljust(20)
print(x, "is my favorite fruit.")

string.lower()

Converts a string into lower case

txt = "Hello my FRIENDS"
x = txt.lower()
print(x)

string.lstrip(characters)

Returns a left trim version of the string

txt = "     banana     "
x = 
txt.lstrip()
print("of all fruits", x, "is my favorite")

string.maketrans(x, y, z)

Returns a translation table to be used in translations

txt = "Hello Sam!"
mytable = txt.maketrans("S", "P")
print(txt.translate(mytable))

string.partition(value)

Returns a tuple where the string is parted into three parts

txt = "I could eat bananas all day"
x = txt.partition("bananas")
print(x)

string.replace(oldvalue, newvalue, count)

Returns a string where a specified value is replaced with a specified value

txt = "I like bananas"
x = txt.replace("bananas", "apples")
print(x)

string.rfind(value, start, end)

Searches the string for a specified value and returns the last position of where it was found

txt = "Mi casa, su casa."
x = txt.rfind("casa")
print(x)

string.rindex(value, start, end)

Searches the string for a specified value and returns the last position of where it was found

txt = "Mi casa, su casa."
x = txt.rindex("casa")
print(x)

string.rjust(length, character)

Returns a right justified version of the string

txt = "banana"
x = txt.rjust(20)
print(x, "is my favorite fruit.")

string.rpartition(value)

Returns a tuple where the string is parted into three parts

txt = "I could eat bananas all day, bananas are my favorite fruit"
x = txt.rpartition("bananas")
print(x)

string.rsplit(separator, maxsplit)

Splits the string at the specified separator, and returns a list

txt = "apple, banana, cherry"
x = txt.rsplit(", ")
print(x)

string.rstrip(characters)

Returns a right trim version of the string

txt = "     banana     "
x = txt.rstrip()
print("of all fruits", x, "is my favorite")

string.split(separator, maxsplit)

Splits the string at the specified separator, and returns a list

txt = "welcome to the jungle"
x = txt.split()
print(x)

string.splitlines(keeplinebreaks)

Splits the string at line breaks and returns a list

txt = "Thank you for the music\nWelcome to the jungle"
x = txt.splitlines()
print(x)

string.startswith(value, start, end)

Returns true if the string starts with the specified value

txt = "Hello, welcome to my world."
x = txt.startswith("Hello")
print(x)

string.strip(characters)

Returns a trimmed version of the string

txt = "     banana     "
x = txt.strip()
print("of all fruits", x, "is my favorite")

string.swapcase()

Swaps cases, lower case becomes upper case and vice versa

txt = "Hello My Name Is PETER"
x = txt.swapcase()
print(x)

string.title()

Converts the first character of each word to upper case

txt = "Welcome to my world"
x = txt.title()
print(x)

string.translate(table)

Returns a translated string

#use a dictionary with ascii codes to replace 83 (S) with 80 (P):
mydict = {83:  80}
txt = "Hello Sam!"
print(txt.translate(mydict))

string.upper()

Converts a string into upper case

txt = "Hello my friends"
x = txt.upper()
print(x)

string.zfill(len)

Fills the string with a specified number of 0 values at the beginning

txt = "50"
x = txt.zfill(10)
print(x)