What are the data types in Python? in June-2020

What are the data types in Python?

Built-in Data Types

The data type is the main concept of programming.

And variables can store the data of different types and these different data-types can do different things.

In these categories, python has the following data types built-in by default.

Text Type:	Str
Numeric Types:	int, float, complex
Sequence Types:	list, tuple, range
Mapping Type:	Dict
Set Types: set, frozenset	set, frozenset
Boolean Type: Bool	Bool
Binary Types:	bytes, bytearray, memoryview

Getting the DataType

If You can get data-type of any object through using the type() function:

Example

Print the data type of variable x:

x = 5

print(type(x))

In python, BasicData Types

The Table of Contents

Integers
Floating-Point Numbers
Complex Numbers
Strings
Built-in Function
Math
Input/output
Variables, References, and Scopes
Miscellaneous
Conclusion

Integers

There is effectually no limits to how long an integer operations value can be.

And this is constrained through the quantity of memory your system has, as are all things, but outside that, an integer can also be as long as you necessity it to be, in python 3:

>>>

>>> print(123123123123123123123123123123123123123123123123 + 1)

123123123123123123123123123123123123123123123124

The decimal digit without any prefix to be a decimal number by python interprets a system:

>>>

>>> print(10)

Some following strings can be prepended to an integer operations value to show the base other than 10:

Prefix	Interpretation	Base
0b (zero + lowercase letter 'b') 0B (zero + uppercase letter 'B')	Binary	2
0o (zero + lowercase letter 'o') 0O (zero + uppercase letter 'O')	Octal	8
0x (zero + lowercase letter 'x') 0X (zero + uppercase letter 'X')	Hexadecimal	16

For example:

>>>

>>> print(0o10)

>>> print(0x10)

>>> print(0b10)

For more information on integer operations values with non-decimal bases, if you want to see the following Wikipedia sites then go on it: Binary, Octal, and Hexadecimal.

And which is the underlying type of python integer, these are irrespective of base used to require it, it’s called int:

>>>

>>> type(10)

<class 'int'>

>>> type(0o10)

<class 'int'>

>>> type(0x10)

<class 'int'>

Note: This is a respectable time to indication that if you want to display a value while in a REPL session, you don’t want to use the print() function.

Just only typing the importance at the >>> prompt and hitting Enter will display it:

>>>

>>> 10

>>> 0x10

>>> 0b10

Several of the examples in this lesson series will use this feature.

Note that this does not work inside a script file.

A value acting on a line by itself in a script folder will not do anything.

Floating-Point Numbers

A floating-point number is a floating-point type in python designates. The float value is indicated with a decimal point.

Optionally, some characters like e or E followed by a positive or negative integer may be added to specify scientific notation.

>>>

>>> 4.2

4.2

>>> type(4.2)

<class 'float'>

>>> 4.

4.0

>>> .2

0.2

>>> .4e7

4000000.0

>>> type(.4e7)

<class 'float'>

>>> 4.2e-4

0.00042

Complex Numbers

A Complex numbers are identified as <real part>+<imaginary part>j. For example:

>>>

>>> 2+3j

(2+3j)

>>> type(2+3j)

<class 'complex'>

Strings

A String operator type is the structure of character data. The string type is called str, in python.

A python defines string literals may be using either single or double-quotes.

All these characters among the opening delimiter and matching closing delimiter these are part of the string:

>>>

>>> print("I am a string.")

I am a string.

>>> type("I am a string.")

<class 'str'>

>>> print('I am too.')

I am too.

>>> type('I am too.')

<class 'str'>

In python, a string operator can contain as several characters as you wish. Your machine’s memory resources are only limits. But a string can also be empty:

>>>

>>> ''

Whatever if you want to contain a character quote as the part of the string itself! And your main impulse might be to try something like this:

>>>

>>> print('This string contains a single quote (') character.')

SyntaxError: invalid syntax

A string in this example opens by a single quote, therefore the python assumes the following single quote, and one in parentheses this was intentional to be the part of the string, is a closing delimiter.

Now final single quote is then a stray and causes the syntax error shown. As you can see, that doesn’t work so well.

Now if you want to contain either type of character quote within the string, then the simplest way is to delimit the string through another type.

But if the string is to include a single quote, delimit it with double quotes and vice versa:

>>>

>>> print like ("The string has contained a single quotation of (') character.")

This string involves a single quote (') character.

>>> print like (“The string has to contain a double quotation of (") character.')

This string contains a double quote (") character.

Built-In Functions

As of python 3.6, now the python interpreter supports several built-in functions: sixty-eight.

And you will also cover many of these in the following discussions, as they come up in context.

Now, a brief overview follows, what is available it’s just to give a feel. If you want to see more detail of python documentation on built-in functions.

Then many of the following descriptions are referring to the topic and concepts that will be discoursed in upcoming tutorials.

Math

Function

Description

abs()

Returns absolute value of a number

divmod()

Returns quotient and remainder of integer division

max()

Returns the biggest of the given arguments or items in an iterable

min()

Returns the lowest of the given arguments or items in an iterable

pow()

Raises a number to a power

round()

Rounds a floating-point value

sum()

Sums the items of an iterable

Input/Output

Function

Description

format()

Converts a value to a formatted representation

input()

open()

Reads input from the console

Opens a file and returns a file object

print()

Prints to a text stream or the console

Variables, References, and Scope

Function

Description

dir()

Returns a list of names in existing local scope or a slope of object attributes

globals()

Returns a dictionary representative the existing global symbol table

id()

Returns the personality of an object

locals()

Updates and returns a dictionary representative current local symbol table

Vars()

Returns dict characteristic for a part, class, or object

Miscellaneous

Function	Description
callable()	Returns True if object appears callable
compile()	Compiles cause into a code or AST object
eval()	Evaluates a Python expression
exec()	Implements dynamic execution of Python code
hash()	Returns the hash value of an object
help()	Invokes the built-in help system
memoryview() staticmethod()	Returns a memory view object Returns a static method for a function
__import__()	Invoked by the import statement

Conclusion

You learned in this tutorials, about the built-in data type and function which python provides.

This example assumed so far have all manipulated and displayed only constant values.

In most of the programs, that value is change as the program executes when you are usually going to want to create objects.

What are the data types in Python? in June-2020