Data Type

In programming, data type is an important concept. Variables can store data of different types like str, int, float….

Look at Table for Python Data type’s:

Int	Str	Float
Bytes	Tuple	Set
Range	None	Complex
List	Dict	Bytearray
Frozen Set	Bool

Note: In python3 Long Data Type not there.

Int Data Type:

Binary Form: If we keep 0b or oB before number it will treat as Binary Number.

a = ob1111, b = 1111(not binary)

Octa Form: If we keep 0O(zero, O) before number it will treat as Octa Number.

a = 0O7777, b = 7777(not octa)

Hexa Form: If we keep 0x(zero, small x or cap’s X) before number it will treat as Hexa Number.

a = 0xFace, b = Face(not Hexa)

Float Data Type:

Python’s built-in float type has double precision (it’s a C double in CPython, a Java double in Jython). If you need more precision, get NumPy and use its numpy.

x = 1.200

Complex Data Type:

Complex data type formula is: a + bj

Where: a = Real Part, b = Imaginary Part

In Real Part, we can use any type of number’s like

Bin, Decimal, Octa, Hexa

Example: a = 10 +ob111

a.real => Get Real Value = 10.0

a.imag = > Get Imaginary Value = 20j

But Imaginary Part, it will accept only Decimal and Float Number’s only

Example: a = ob111 + 20j (Correct) b = 10j + 0b111 (Wrong)

Bool Data Type:

Bool Data type will consider as either True or False.

True + True = True

True + False = False

False + False = False

String Data Type:

In python we can define string in Quote’s. either its single or Thrible Quote’s

a = “Welcome to Stackorigin”

b = “””Stackorigin introduced Python tutorial”””

String Forward Direction: [begin:end-1:step]

Step: slice step cant be zero

String Backward Direction:[begin:end+1:step]

Step: slice step cant be zero

Concatenation Operator: Both should be string only.

example: “stack” + “origin” = stackorigin

Repetition Operator: One type should be int and another one is string.

example: “stack” * 5 => stackstackstackstackstack

len() to know how many character’s are there in string.

Strip(): remove space between string.

Count() count sub string in the give string.

Replace() replace a string from old to new string.

Split():split is applicable for string object. split() method splits a string into a list.

RSplit(): Rsplit method is used to reverse the split.

Join() join() method takes all items in an iterable and joins them into one string.

Upper(): upper() method converts all lowercase characters in a string into uppercase characters and returns it

Lower(): lower() method converts all uppercase characters in a string into lowercase characters and returns it

SwapCase() Make the lower case letters upper case and the upper case letters lower case

Title(): Make the first letter in each word upper case

Capitalize(): Upper case the first letter in this sentence

Startswith() Check if the string starts with “stackorigin”

Endswith() Check if the string end’s with “python”

find():The find() method finds the first occurrence of the specified value. if not found it will return “-1”.

RFind() The rfind() method finds the last occurrence of the specified value.

Index(): The index() method returns the position at the first occurrence of the specified value.

RIndex(): The rindex() method finds the last occurrence of the specified value.

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

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

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

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

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

istitle(): 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.