Python modules

Modules in python

#use import statement to import modules
import random
r = random.randint(1,10)
#use from-import statements to import functions
from random import randint
r = randint(1,10)
#use from module import * statement to import all functions
from random import *
r = randint(1,10)

Python modules

A programmer usually prefer the predefined functions and variables for document,
Modules are collection of several diffrent definitions(functions and variables)
and statements.Or to put simply The files with ".py" appended at the name of the
source code,the user can import that module(files) or specific function fromthat
module into the file.
programmer use the module,complete project in less time and more efficient way.
programmer generally import either the module which user saved with ".py" or can
use some standard module like random,queue,array,math,profile,statistics etc....
just type "help('modules')" and you can see all standard modules in interactive
mode.
-------------------------------------------------------------------------------
 Eg--> # here entire math universe will come into the program 
>>> import math
>>> math.cos(60)# math.cos()
-0.9524129804151563
>>> math.ceil(6.12)#math.ceil()
7
>>> math.log2(4)#math.log2()
2.0
-------------------------------------------------------------------------------
#but if you want specific built in function then use "from".
 Eg--> # only perticular function will come from the math module.
>>> from math import sqrt,sin
>>> sqrt(9)#math module will be undefine since only function sqrt,sin defined
3.0
>>> sin(60)# sin is imported from math and "math." is not required
-0.3048106211022167
>>> cos(60)# cos is not part of the built in function that imported from math.
'''Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    cos(60)
NameError: name 'cos' is not defined'''
>>> math.cos(60)# this gives error because math has not been imported
'''Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    math.cos(60)
NameError: name 'math' is not defined'''
-------------------------------------------------------------------------------

Modules in python

import  pandas as pd:

Similar codes

-3 votes278 views1 answer
How to install chatterbot from github
Python
3 votes265 views2 answers
Distplot in python
Python
2 votes277 views1 answer
Getting dummies for a column in pandas dataframe
Python
3 votes262 views1 answer
Django user group check
Python
0 vote266 views1 answer
Gdscript fixed decimal
Python
4 votes255 views1 answer
Python turtle square
Python
1 vote261 views1 answer
Nlargest hierarchy series pandas
Python
0 vote268 views3 answers
Repeat
Python
20 votes279 views6 answers
Lowercase python
Python
2 votes283 views1 answer
Python how to make an array of ones
Python