# Python program to find Area of a circle

def findArea(r):

PI = 3.142

return PI * (r*r);

# Driver method

print("Area is %.6f" % findArea(5));

# enjoy

#the list of libraries in python

TensorFlow

Scikit-Learn

Numpy

Keras

PyTorch

LightGBM

Eli5

SciPy

Theano

Pandas

Scikit- learn

Truth Value Testing

Boolean Operations — and, or, not

Comparisons

Numeric Types — int, float, complex

Iterator Types

Sequence Types — list, tuple, range

Text Sequence Type — str

Binary Sequence Types — bytes, bytearray, memoryview

Set Types — set, frozenset

Mapping Types — dict

Context Manager Types

Other Built-in Types

Special Attributes

Built-in Exceptions

Base classes

Concrete exceptions

Warnings

Exception hierarchy

Text Processing Services

string — Common string operations

re — Regular expression operations

difflib — Helpers for computing deltas

textwrap — Text wrapping and filling

unicodedata — Unicode Database

stringprep — Internet String Preparation

readline — GNU readline interface

rlcompleter — Completion function for GNU readline

Binary Data Services

struct — Interpret bytes as packed binary data

codecs — Codec registry and base classes

Data Types

datetime — Basic date and time types

calendar — General calendar-related functions

collections — Container datatypes

collections.abc — Abstract Base Classes for Containers

heapq — Heap queue algorithm

bisect — Array bisection algorithm

array — Efficient arrays of numeric values

weakref — Weak references

types — Dynamic type creation and names for built-in types

copy — Shallow and deep copy operations

pprint — Data pretty printer

reprlib — Alternate repr() implementation

enum — Support for enumerations

Numeric and Mathematical Modules

numbers — Numeric abstract base classes

math — Mathematical functions

cmath — Mathematical functions for complex numbers

decimal — Decimal fixed point and floating point arithmetic

fractions — Rational numbers

random — Generate pseudo-random numbers

statistics — Mathematical statistics functions

Functional Programming Modules

itertools — Functions creating iterators for efficient looping

functools — Higher-order functions and operations on callable objects

operator — Standard operators as functions

File and Directory Access

pathlib — Object-oriented filesystem paths

os.path — Common pathname manipulations

fileinput — Iterate over lines from multiple input streams

stat — Interpreting stat() results

filecmp — File and Directory Comparisons

tempfile — Generate temporary files and directories

glob — Unix style pathname pattern expansion

fnmatch — Unix filename pattern matching

linecache — Random access to text lines

shutil — High-level file operations

Data Persistence

pickle — Python object serialization

copyreg — Register pickle support functions

shelve — Python object persistence

marshal — Internal Python object serialization

dbm — Interfaces to Unix “databases”

sqlite3 — DB-API 2.0 interface for SQLite databases

Data Compression and Archiving

zlib — Compression compatible with gzip

gzip — Support for gzip files

bz2 — Support for bzip2 compression

lzma — Compression using the LZMA algorithm

zipfile — Work with ZIP archives

tarfile — Read and write tar archive files

File Formats

csv — CSV File Reading and Writing

configparser — Configuration file parser

netrc — netrc file processing

xdrlib — Encode and decode XDR data

plistlib — Generate and parse Mac OS X .plist files

Cryptographic Services

hashlib — Secure hashes and message digests

hmac — Keyed-Hashing for Message Authentication

secrets — Generate secure random numbers for managing secrets

Generic Operating System Services

os — Miscellaneous operating system interfaces

io — Core tools for working with streams

time — Time access and conversions

argparse — Parser for command-line options, arguments and sub-commands

getopt — C-style parser for command line options

logging — Logging facility for Python

logging.config — Logging configuration

logging.handlers — Logging handlers

getpass — Portable password input

curses — Terminal handling for character-cell displays

curses.textpad — Text input widget for curses programs

curses.ascii — Utilities for ASCII characters

curses.panel — A panel stack extension for curses

platform — Access to underlying platform’s identifying data

errno — Standard errno system symbols

ctypes — A foreign function library for Python

Concurrent Execution

threading — Thread-based parallelism

multiprocessing — Process-based parallelism

multiprocessing.shared_memory — Provides shared memory for direct access across processes

The concurrent package

concurrent.futures — Launching parallel tasks

subprocess — Subprocess management

sched — Event scheduler

queue — A synchronized queue class

_thread — Low-level threading API

_dummy_thread — Drop-in replacement for the _thread module

dummy_threading — Drop-in replacement for the threading module

contextvars — Context Variables

Context Variables

Manual Context Management

asyncio support

Networking and Interprocess Communication

asyncio — Asynchronous I/O

socket — Low-level networking interface

ssl — TLS/SSL wrapper for socket objects

select — Waiting for I/O completion

selectors — High-level I/O multiplexing

asyncore — Asynchronous socket handler

asynchat — Asynchronous socket command/response handler

signal — Set handlers for asynchronous events

mmap — Memory-mapped file support

Internet Data Handling

email — An email and MIME handling package

json — JSON encoder and decoder

mailcap — Mailcap file handling

mailbox — Manipulate mailboxes in various formats

mimetypes — Map filenames to MIME types

base64 — Base16, Base32, Base64, Base85 Data Encodings

binhex — Encode and decode binhex4 files

binascii — Convert between binary and ASCII

quopri — Encode and decode MIME quoted-printable data

uu — Encode and decode uuencode files

Structured Markup Processing Tools

html — HyperText Markup Language support

html.parser — Simple HTML and XHTML parser

html.entities — Definitions of HTML general entities

XML Processing Modules

xml.etree.ElementTree — The ElementTree XML API

xml.dom — The Document Object Model API

xml.dom.minidom — Minimal DOM implementation

xml.dom.pulldom — Support for building partial DOM trees

xml.sax — Support for SAX2 parsers

xml.sax.handler — Base classes for SAX handlers

xml.sax.saxutils — SAX Utilities

xml.sax.xmlreader — Interface for XML parsers

xml.parsers.expat — Fast XML parsing using Expat

Internet Protocols and Support

webbrowser — Convenient Web-browser controller

cgi — Common Gateway Interface support

cgitb — Traceback manager for CGI scripts

wsgiref — WSGI Utilities and Reference Implementation

urllib — URL handling modules

urllib.request — Extensible library for opening URLs

urllib.response — Response classes used by urllib

urllib.parse — Parse URLs into components

urllib.error — Exception classes raised by urllib.request

urllib.robotparser — Parser for robots.txt

http — HTTP modules

http.client — HTTP protocol client

ftplib — FTP protocol client

poplib — POP3 protocol client

imaplib — IMAP4 protocol client

nntplib — NNTP protocol client

smtplib — SMTP protocol client

smtpd — SMTP Server

telnetlib — Telnet client

uuid — UUID objects according to RFC 4122

socketserver — A framework for network servers

http.server — HTTP servers

http.cookies — HTTP state management

http.cookiejar — Cookie handling for HTTP clients

xmlrpc — XMLRPC server and client modules

xmlrpc.client — XML-RPC client access

xmlrpc.server — Basic XML-RPC servers

ipaddress — IPv4/IPv6 manipulation library

Multimedia Services

audioop — Manipulate raw audio data

aifc — Read and write AIFF and AIFC files

sunau — Read and write Sun AU files

wave — Read and write WAV files

chunk — Read IFF chunked data

colorsys — Conversions between color systems

imghdr — Determine the type of an image

sndhdr — Determine type of sound file

ossaudiodev — Access to OSS-compatible audio devices

Internationalization

gettext — Multilingual internationalization services

locale — Internationalization services

Program Frameworks

turtle — Turtle graphics

cmd — Support for line-oriented command interpreters

shlex — Simple lexical analysis

Graphical User Interfaces with Tk

tkinter — Python interface to Tcl/Tk

tkinter.ttk — Tk themed widgets

tkinter.tix — Extension widgets for Tk

tkinter.scrolledtext — Scrolled Text Widget

IDLE

Other Graphical User Interface Packages

Development Tools

typing — Support for type hints

pydoc — Documentation generator and online help system

doctest — Test interactive Python examples

unittest — Unit testing framework

unittest.mock — mock object library

unittest.mock — getting started

2to3 - Automated Python 2 to 3 code translation

test — Regression tests package for Python

test.support — Utilities for the Python test suite

test.support.script_helper — Utilities for the Python execution tests

Debugging and Profiling

Audit events table

bdb — Debugger framework

faulthandler — Dump the Python traceback

pdb — The Python Debugger

The Python Profilers

timeit — Measure execution time of small code snippets

trace — Trace or track Python statement execution

tracemalloc — Trace memory allocations

Software Packaging and Distribution

distutils — Building and installing Python modules

ensurepip — Bootstrapping the pip installer

venv — Creation of virtual environments

zipapp — Manage executable Python zip archives

Python Runtime Services

sys — System-specific parameters and functions

sysconfig — Provide access to Python’s configuration information

builtins — Built-in objects

__main__ — Top-level script environment

warnings — Warning control

dataclasses — Data Classes

contextlib — Utilities for with-statement contexts

abc — Abstract Base Classes

atexit — Exit handlers

traceback — Print or retrieve a stack traceback

__future__ — Future statement definitions

gc — Garbage Collector interface

inspect — Inspect live objects

site — Site-specific configuration hook

Custom Python Interpreters

code — Interpreter base classes

codeop — Compile Python code

Importing Modules

zipimport — Import modules from Zip archives

pkgutil — Package extension utility

modulefinder — Find modules used by a script

runpy — Locating and executing Python modules

importlib — The implementation of import

Using importlib.metadata

Python Language Services

parser — Access Python parse trees

ast — Abstract Syntax Trees

symtable — Access to the compiler’s symbol tables

symbol — Constants used with Python parse trees

token — Constants used with Python parse trees

keyword — Testing for Python keywords

tokenize — Tokenizer for Python source

tabnanny — Detection of ambiguous indentation

pyclbr — Python module browser support

py_compile — Compile Python source files

compileall — Byte-compile Python libraries

dis — Disassembler for Python bytecode

pickletools — Tools for pickle developers

Miscellaneous Services

formatter — Generic output formatting

MS Windows Specific Services

msilib — Read and write Microsoft Installer files

msvcrt — Useful routines from the MS VC++ runtime

winreg — Windows registry access

winsound — Sound-playing interface for Windows

Unix Specific Services

posix — The most common POSIX system calls

pwd — The password database

spwd — The shadow password database

grp — The group database

crypt — Function to check Unix passwords

termios — POSIX style tty control

tty — Terminal control functions

pty — Pseudo-terminal utilities

fcntl — The fcntl and ioctl system calls

pipes — Interface to shell pipelines

resource — Resource usage information

nis — Interface to Sun’s NIS (Yellow Pages)

syslog — Unix syslog library routines

Superseded Modules

optparse — Parser for command line options

imp — Access the import internals

Undocumented Modules

Platform specific modules