Python Tutorial

Introduction Python Features Python Applications Python System Requirements Python Installation Python Examples Python Basics Python Indentation Python Variables Python Data Types Python IDE Python Keywords Python Operators Python Comments Python Pass Statement

Python Conditional Statements

Python if Statement Python elif Statement Python If-else statement Python Switch Case

Python Loops

Python for loop Python while loop Python Break Statement Python Continue Statement Python Goto Statement

Python Arrays

Python Array Python Matrix

Python Strings

Python Strings Python Regex

Python Built-in Data Structure

Python Lists Python Tuples Python Lists vs Tuples Python Dictionary Python Sets

Python Functions

Python Function Python min() function Python max() function Python User-define Functions Python Built-in Functions Python Recursion Anonymous/Lambda Function in Python python apply() Function Python lambda() Function

Python File Handling

Python File Handling Python Read CSV Python Write CSV Python Read Excel Python Write Excel Python Read Text File Python Write Text File Read JSON File in Python

Python Exception Handling

Python Exception Handling Python Errors and exceptions Python Assert

Python OOPs Concept

OOPs Concepts in Python Classes & Objects in Python Inheritance in Python Polymorphism in Python Python Encapsulation Python Constructor Python Super function Python Static Method Static Variables in Python Abstraction in Python

Python Iterators

Iterators in Python Yield Statement In Python Python Yield vs Return

Python Generators

Python Generator

Python Decorators

Python Decorator

Python Functions and Methods

Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods

Python Modules

Python Modules Python Datetime Module Python Math Module Python Import Module Python Time Module Python Random Module Python Calendar Module CSV Module in Python Python Subprocess Module Python Subprocess

Python MySQL

Python MySQL Python MySQL Client Update Operation Delete Operation Database Connection Creating new Database using Python MySQL Creating Tables Performing Transactions

Python MongoDB

Python MongoDB

Python SQLite

Python SQLite

Python Data Structure Implementation

Python Stack Python Queue Python Linked List Python Hash Table Python Graph

Python Advance Topics

Speech Recognition in Python Face Recognition in Python Python Linear regression Python Rest API Python Command Line Arguments Python JSON Python Virtual Environment Type Casting in Python Python Collections Python Commands Python Data Visualization Python Debugger Python DefaultDict Python Enumerate

Python 2

What is Python 2

Python 3

Anaconda in Python 3 Anaconda python 3 installation for windows 10 List Comprehension in Python3

Misc

Python PPTX Python Pickle Python Seaborn Python Coroutine Python EOL Python Infinity Python math.cos and math.acos function Python Project Ideas Based On Django Reverse a String in Python Reverse a Number in Python Python Word Tokenizer Python Trigonometric Functions Python try catch exception GUI Calculator in Python Implementing geometric shapes into the game in python Installing Packages in Python Python Try Except Python Sending Email Socket Programming in Python Python CGI Programming Python Data Structures Python abstract class Python Compiler Python K-Means Clustering NSE Tools In Python Operator Module In Python Palindrome In Python Permutations in Python Pillow Python introduction and setup Python Functionalities of Pillow Module Python Argmin Python whois Python JSON Schema Python lock Return Statement In Python Reverse a sentence In Python tell() function in Python Why learn Python? Write Dictionary to CSV in Python Write a String in Python Binary Search Visualization using Pygame in Python Latest Project Ideas using Python 2022 Closest Pair of Points in Python ComboBox in Python Python vs R Best resources to learn Numpy and Pandas in python Check Letter in a String Python Python Console Python Control Statements Convert Float to Int in Python using Pandas Difference between python list and tuple Importing Numpy in Pycharm Python Key Error Python NewLine Python tokens and character set Python Strong Number any() Keyword in python Best Database in Python Check whether dir is empty or not in python Comments in the Python Programming Language Convert int to Float in Python using Pandas Decision Tree Classification in Python End Parameter in python __GETITEM__ and __SETITEM__ in Python Python Namespace Python GUI Programming List Assignment Index out of Range in Python List Iteration in Python List Index out of Range Python for Loop List Subtract in Python Python Empty Tuple Python Escape Characters Sentence to python vector Slicing of a String in Python Executing Shell Commands in Python Genetic Algorithm in python Get index of element in array in python Looping through Data Frame in Python Syntax of Map function in Python After Python What Should I Learn Python AIOHTTP Alexa Python Artificial intelligence mini projects ideas in python Artificial intelligence mini projects with source code in Python Find whether the given stringnumber is palindrome or not First Unique Character in a String Python Python Network Programming Python Interface Python Multithreading Python Interpreter Data Distribution in python Flutter with tensor flow in python Front end in python Iterate a Dictionary in Python Iterate a Dictionary in Python – Part 2 Allocate a minimum number of pages in python Assertion Errors and Attribute Errors in Python Checking whether a String Contains a Set of Characters in python Python Control Flow Statements *Args and **Kwargs in Python Bar Plot in Python Conditional Expressions in Python Function annotations() in Python How to Write a Configuration file in Python Image to Text in python import() Function in Python Import py file in Python Multiple Linear Regression using Python Nested Tuple in Python Python String Negative Indexing Reading a File Line by Line in Python Python Comment Block Base Case in Recursive function python ER diagram of the Bank Management System in python Image to NumPy Arrays in Python NOT IN operator in Python One Liner If-Else Statements in Python Sklearn in Python Cube Root in Python Python Variables, Constants and Literals What Does the Percent Sign (%) Mean in Python Creating Web Application in python Notepad++ For Python PyPi TensorFlow Python | Read csv using pandas.read_csv() What is online python free IDE What is Python online compiler Run exec python from PHP What are the Purposes of Python Python Ternary Operators Self in Python Python vs Java Python Modulo Python Packages Python Syntax Python Uses Python Bitwise Operators Python Identifiers Python Matrix Multiplication Python AND Operator Python Logical Operators Python Multiprocessing Python Unit Testing __init__ in Python Advantages of Python Is Python Case-sensitive when Dealing with Identifiers Python Boolean Python Call Function Python History Python Image Processing Python main() function Python Permutations and Combinations Difference between Input() and raw_input() functions in Python Conditional Statements in python Confusion Matrix Visualization Python Python Algorithms Python Modules List Difference between Python 2 and Python 3 Is Python Case Sensitive Method Overloading in Python Python Arithmetic Operators Assignment Operators in Python Is Python Object Oriented Programming language Division in Python Python exit commands Continue And Pass Statements In Python Colors In Python Convert String Into Int In Python Convert String To Binary In Python Convert Uppercase To Lowercase In Python Convert XML To JSON In Python Converting Set To List In Python Covariance In Python CSV Module In Python Decision Tree In Python Difference Between Yield And Return In Python Dynamic Typing In Python What is Python compiler GDB Python coding platform Python Classification Python | a += b is not always a = a + b PyDev with Python IDE Character Set in Python Best Python AI Projects _dict_ in Python

How to

How to Substring a String in Python How to Iterate through a Dictionary in Python How to convert integer to float in Python How to reverse a string in Python How to take input in Python How to install Python in Windows How to install Python in Ubuntu How to install PIP in Python How to call a function in Python How to download Python How to comment multiple lines in Python How to create a file in Python How to create a list in Python How to declare array in Python How to clear screen in Python How to convert string to list in Python How to take multiple inputs in Python How to write a program in Python How to compare two strings in Python How to create a dictionary in Python How to create an array in Python How to update Python How to compare two lists in Python How to concatenate two strings in Python How to print pattern in Python How to check data type in python How to slice a list in python How to implement classifiers in Python How To Print Colored Text in Python How to develop a game in python How to print in same line in python How to create a class in python How to find square root in python How to import numy in python How to import pandas in python How to uninstall python How to upgrade PIP in python How to append a string in python How to open a file in python How to Open a file in python with Path How to run a Python file in CMD How to change the names of Columns in Python How to Concat two Dataframes in Python How to Iterate a List in Python How to learn python Online How to Make an App with Python How to comment out a block of code in Python

Sorting

Python Sort List Sort Dictionary in Python Python sort() function Python Bubble Sort

Programs

Factorial Program in Python Prime Number Program in Python Fibonacci Series Program in Python Leap Year Program in Python Palindrome Program in Python Check Palindrome In Python Calculator Program in Python Armstrong Number Program in Python Python Program to add two numbers Anagram Program in Python Number Pattern Programs in Python Even Odd Program in Python GCD Program in Python Python Exit Program Python Program to check Leap Year Operator Overloading in Python Pointers in Python Python Not Equal Operator Raise Exception in Python Salary of Python Developers in India What is a Script in Python

Import Module in Python

In this article, you will learn everything about “ Import ” in Python.

Modules in python that are already created can be accessed and used in another code by importing the file or the function using " import ". Not only by using " import ", but there are also many other ways that help us to access the functions of another code. But, the " import " is used in order to carry out the processes easily and efficiently.

The syntax for using " import ":

# syntax for using import
import module_name
# the name of the module that is supposed to be 
# inserted must be mentioned  

The function " __import__() " is used and called immediately after the import is used and then searches for the module that is specified within the manageable and reachable scope. The function finally returns the value that the desired module consists of, and then it displays the value through an output of the code into which the module is imported.

What if the mentioned module does not exist?

If any randomly named module is given and asked for import, the Python application searches for the module with the mentioned name. After searching for the module, it shows an error representing the absence of the module with that specific name in your system. Let us understand this concept through the example given below.

Example:

# let us import the module " hello " which is not existing 
# on my pc and find out what happens
import hello
# let us give a print statement to find the error
print(hello.hi)

The output of the program:

Traceback (most recent call last):
  File "d:\downloads hdd\Java vs code programs\math.python.py", line 3, in <module>
    import hello
ModuleNotFoundError: No module named 'hello'

Let us understand the basic operations that can be performed using “ import ” with the following examples:

Example 1:

# let us import the math module and find the value of Euler's number
import math
# assign the value to a variable
a = math.e
# print the value of the variable to which the value of Euler’s # number is assigned
print("The value of Euler's number is: ")
print(a)

The output of the above example program:

The value of Euler's number is: 
2.718281828459045

Example 2:

# let us import the math module and find the value of pi
import math
# assign the value to a variable
a = math.pi
# print the value of the variable to which the value of pi is 
# assigned
print("The value of pi is: ")
print(a)

The output of the above example program:

The value of pi is: 
3.141592653589793

Example 3:

# let us import the math module and find the factorial of the given # number
import math
# assign the value to a variable
b = 10
a = math.factorial(b)
# print the value of the variable to which the factorial of 10 # is assigned
print("The factorial of the number 10 is: ")
print(a)

The output of the above example program:

The factorial of the number 10 is: 
3628800

In the programs that are discussed above, we have imported the entire module but just accessed the value of “ Euler’s number ” in the first program, the value of “ pi ” in the second program, whereas the " factorial " of the number " 10 " in the third program. Such type of accessing can be avoided, and only the required members of the module can be brought up into the program. Let us understand this from the upcoming statements.

The values of Euler’s number, Pi, and calculation of factorial can be retrieved by just importing the members of the " math " module, which supports “ Euler’s number ”, " factorial", and " Pi " respectively.

The function “ __import__().membername ” is called by the object while implementing this concept.

The syntax for importing desired members from a module:

# let us import desired members from the module they belong to
from module_name import member_name

If the module is imported in this way, only the members that are mentioned within the program will be imported from the module, and the rest of the members that belong to the module will just remain unimported. Let us implement this concept in the examples that are discussed above and verify the output for equality.

Example 4 ( Importing only Euler’s number member and mirroring Example 1 ):

# let us import e from the math module and find the value of 
# Euler’s Number
from math import e
# assign the value to a variable
a = e
# print the value of the variable to which the value of Euler’s # number is assigned


print("The value of Euler's number is: ")
print(a)

The output of the above example program:

The value of Euler's number is: 
2.718281828459045

Example 5 ( Importing only pi member and mirroring Example 2 ):

# let us import pi member from the math module and find the 
# value of pi
from math import pi
# assign the value to a variable
a = pi
# print the value of the variable to which the value of pi is 
# assigned
print("The value of pi is: ")
print(a)

The output of the above example program:

The value of pi is: 
3.141592653589793

Example 6 ( Importing only the factorial member and mirroring Example 3 ):

# let us import the factorial member from the math module and 
# find the factorial of a given number
from math import factorial
# assign the value to a variable
b = 10
a = factorial(b)
# print the value of the variable to which the factorial of 10 # is assigned
print("The factorial of the number 10 is: ")
print(a)

The output of the above example program:

The factorial of the number 10 is: 
3628800

We have followed the same procedure that has been followed in the corresponding examples, but there are two differences between the programs. The first one shows that we have imported just the desired member out of the entire module, and the second one shows that we have not mentioned " math.pi " or " math.e " or “ math.factorial ” while assigning the value to the variable. As we have already mentioned the main member and imported it in the initial step, we need not specify the “ math.module_name ” within the code body again.

How can we import all the constants and functions of the module without importing it fully?

The syntax for importing all the constants and functions of the module:

# syntax for importing all the constants and functions of the 
# module
from module_name import *
# the name of the module that is supposed to be 
# inserted must be mentioned, and " * " indicates " all "  

The above syntax represents how to import all the constants and functions that are embedded in a particular module without completely importing it. Let us work on a few examples that demonstrate this mechanism.

Example 7:

# let us import all the constants and functions of the 
# module “ math ” and find out the value of “ pi ”
from math import *
# print the value of pi 
print('The value of pi is: ')
print(pi)

The output of the program:

The value of pi is: 
3.141592653589793

Example 7:

# let us import all the constants and functions of the 
# module “ math ” and find out the factorial of “ 10 ”
from math import *
# print the value of factorial of “ 10 ” 
print('The factorial of 10 is ')
print(factorial(10))

The output of the program:

The factorial of 10 is 
3628800

Instead of writing these two types of different concepts as two programs, we can merge both concepts and write them within a single program. Let us discuss this concept through another example.

Example 8:

# let us import all the constants and functions of the 
# module “ math ” and find out the value of “ pi ” and the 
# “ factorial of 10 ”
from math import *
# print the value of pi 
print('The value of pi is: ')
print(pi)
# print the value of factorial of “ 10 ” 
print('The factorial of 10 is ')
print(factorial(10))

The output of the program:

The value of pi is: 
3.141592653589793
The factorial of 10 is 
3628800

Out of all these methods, the best one and the most efficient one that can be used is the last method. The reason is that this method enables all the features, which include constants and functions that the module consists of, and gives access to those without importing the module completely. This quality makes this method more efficient.



ADVERTISEMENT
ADVERTISEMENT