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![Indexing is used to extract individual characters from astring Indexing in python starts from 0. S =‘welcome’ S[0] = ‘w’ S[1]=‘e’ ….](https://image.slidesharecdn.com/introductiontopythonprogramming-210518114757/75/Introduction-to-Python-Programming-37-2048.jpg)
![Slicing is taking subsets from a string. Lower limit is inclusive where as Upper limit isexclusive. S=‘welcome’ S[0:2] ?? S[0:] ?? S[:3] ?? S[:] ??? S[0:4]??](https://image.slidesharecdn.com/introductiontopythonprogramming-210518114757/75/Introduction-to-Python-Programming-38-2048.jpg)
Introduction to Python Programming
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- 3. Search algorithms Log analysis GoogleData Python Client Library Google APIs Client Library for Python Google AdWords API Python Client Library Machine Learning Robotics projects
- 5. NAME IS BASEDON A BBC COMEDY SERIES FROM THE 1970S Monty Python's Flying Circus Guido van Ro s s u m December 1989
- 6. Python is usedacross domains such as: Scripting Testing Web Development IoT Programming Data Science
- 7. Programming is error-prone! Programmingerrors are called bugs The process of tracking them down is called debugging
- 8. Easy-to-learn: Python has fewkeywords, a simple structure, and a clearly defined syntax. Easy-to-read: Python code is more clearly defined and visible to the eyes. Easy-to-maintain: Python's source code is fairly easy to maintain. A broad standard library: Python's bulk of the library is very portable and cross-platform compatible on UNIX, Windows, and Macintosh. Interactive Mode: Python has support for an interactive mode that allows interactive testing and debugging of snippets of code. Portable: Python can run on a wide variety of hardware platforms and has the same interface on all platforms.
- 9. Extendable: You can addlow-level modules to the Python interpreter. These modules enable programmers to add to or customize their tools to be more efficient. Databases: Python provides interfaces to all major commercial databases. GUI Programming: Python supports GUI applications that can be created and ported to many system calls, libraries, and windows systems, such as Windows MFC, Macintosh, and the X Window system of Unix. Scalable: Python provides a better structure and support for large programs than shell scripting.
- 10. Portability: A property ofa program that can run on more than one kind of computer. Interpret: To execute a program in a high-level language by translating it one line at a time. Compile: To translate a program written in a high-level language into a low-level language all at once, in preparation for later execution.
- 13. A program isa sequence of instructions that specifies how to perform a computation. Input: Get data from the keyboard, a file, or some other device. Output: Display data on the screen or send data to a file or other device. Process: 1.Math: Perform basic mathematical operations like addition and multiplication. 2.Conditional execution: Check for certain conditions andexecute the appropriate code. 3.Repetition: Perform some action repeatedly, usually with some variation.
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- 17. Num bers 1.int (signedintegers): They are often called just integers or int, are positive or negative whole numbers with no decimal point. 2. long (long integers ): Also called long, they are integers of unlimited size, written like integers and followed by an uppercase or lowercaseL. 3. float (floating point real values): Also called floats, they represent real numbers and are written with a decimal point dividing the integer and fractional parts. Floats may also be in scientific notation, with Eor e indicating the power of 10 (2.5e2 = 2.5 x 102= 250). 4. complex (complex numbers): Are of the form a + bJ, where a and b are floats and J (or j) represents the square root of -1 (which is an imaginary number). The real part of the number is a, and the imaginary part is b.
- 18. 1.Variables are reservedmemory locations that are used to store values and are referenced by a name. Example: Assigning a contact number and referencing it by a contact name 2.Syntax to define a variable is asfollows: variableName = value Example: phoneNumber = 12345
- 19. Variable name shouldstart with an alphabet orunderscore (‘_’) followed by any number of alphabets, digits andunderscores Variable names are case sensitive. Example: phoneNumber is different from PhoneNumber and phonenumber Variable name cannot be a reserved name Example: print, if, for, etc Variable name cannot contain any special character other thanunderscore
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- 21. List , Listcomprehension Tuple Dictionary
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- 23. While loop –syntax-while(condition): For loop – syntax – for i in range(0,n):
- 24. A collection ofbuilt-in modules, each providing different functionality beyond what is included in the corePython. import math math.sqrt(16) math.factorial(10) These are called as fruitful functions in python.
- 25. Functions are createdto make calculations easy toreuse The general form of a function call is <<function_name>>(<<arguments>>) An argument is an expression that appears between the parenthesis of a function call. The number within parenthesis in the below function call is argument.
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- 27. Rules to executea function call: Evaluate each argument one at a time, working from left to right. Pass the resulting values into the function. Executes the function. The result is obtained. abs(-7) + abs (3) pow(abs(-2), round(3.2))
- 28. X = input(“Enteran expression:”) Multiple assignments are also possible Ex: x,y = 3,4 x,y = map(int, input().split())
- 29. def f1(): •print(‘Inside thefunction’) f1()
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- 31. def add(): print(“Enter 2numbers to add:”) a =int(input(“1st number:”)) b =int(input(“2nd number:”)) return(a+b) result = add() print(‘After addition:’ result)
- 32. num=int(input("Enter the number")) fact=1 fori in range (1,num+1): fact=fact*i print(fact)
- 33. def fact(num): fact=1 for iin range (1,num+1): fact=fact*i print(fact) return fact num=int(input("Enter the number")) fact(num)
- 34. def fact(num): if(num==1): return(1 ) else: return num*fact(num-1) num=int(input("Enterthe number")) print(fact(num))
- 35. Strings are acollection of characters. They are enclosed in single or double-quotes. Eg: ‘Climate is pleasant’ ‘1234’ ‘#@$’
- 36. Operators overloading areavailable in default. 3*’a’ = ‘aaa’ ‘a’+’a’ = ‘aa’ ‘a’ +3 will give synatax error (you cannot add a string anda number) ‘a’ +‘3’ = ‘a3’ ‘a’*’a’ will give a syntax error.
- 37. Indexing is usedto extract individual characters from astring Indexing in python starts from 0. S =‘welcome’ S[0] = ‘w’ S[1]=‘e’ ….
- 38. Slicing is takingsubsets from a string. Lower limit is inclusive where as Upper limit isexclusive. S=‘welcome’ S[0:2] ?? S[0:] ?? S[:3] ?? S[:] ??? S[0:4]??
- 39. ‘a’ in ‘ssn’ ‘ss’in ‘ssn’ Replacing a string: Text =‘Python is easy’ Text =Text.replace(‘easy’ , ‘easy and powerful’)
- 40. Explore the otherfunctions -Assignment
- 41. Write a pythonfunction to find the max of 3 numbers Check whether a number is palindrome using function Check whether a string is palindrome using function
- 42. Write a Pythonfunction that accepts a string and calculatethe number of upper case letters and lower case letters