Python for Beginners pdf free download, dummies, commands, examples, NumPy, SciPy, for Data Scientist, Data Analyst and Data Engineers.

Reusable Define Function with Return

---

Python 2D Lists and Nested Loops Examples

---

Python exception handling using
try except with examples

---

Python For Loop condition with examples

---

Python while condition with examples

---

Python if elif else logical condition

---

Python Tuples vs List

---

Python Translator with Examples

---

Python List Functions with Examples

---

Data Structures and Data Types

---

Python Exponent Function with examples

---

Python dictionary with examples

---

Variables, Expressions & Statements

---

List of 'Reserved Words' in Python

---

Boolean Expressions &
Comparison Operators

Define Function:

Collection of code which performs a specific task. Definition Function starts with ‘def’.
Function is very commonly used coding technique in Python. In real time scenarios, the python application (or) python data pipeline is developed using one or more python Functions.

Example:

Code:

def name_age(name, age):
===>print("You are " + name + " at age " + age)

name_age("John", "30")


Result:

You are John at age 30

... Click here for full details

---

Python 2D Lists and Nested Loops:

Example 1:

number_grid = [
===>[1, 2, 3],
===>[4, 5, 6],
===>[7, 8, 9],
===>[0]
]

for row in number_grid:
===>for col in row:
======>print(col)


Result:

1
2
3
4
5
6
7
8
9
0


... Click here for full details

---

Example 1:

---

try:
===>number = int(input("Enter a number: "))
===>print(number)
except:
===>print("Invalid Number")


First Result:
Enter a number: 9
9

... Click here for full details

---

Python For Loop Condition Definition:

When there is a need to loop through a set of things such as a list of words (or) the lines in a file. In this case we can construct a definite loop using a for statement.

The key difference between ‘While’ condition and ‘For Loop’:

while statement is an indefinite loop because it simply loops until some condition becomes False.

for loop is looping through a known set of items so it runs through as many iterations as there are items in the set.

Example 1:

---

friends = ["John", "Kevin", "Karen"]
for friend in friends:
===>print(friend)


Result:
John
Kevin
Karen


... Click here for full details

---

Python While Condition Definition:

In while loop the target code execution takes place until the condition used is TRUE.

Example:

i = 1
while i <= 10:
===>print(i)
===>i += 1

print("Loop completed")


... Click here for full details

---

if elif else conditional statement:

Python IF condition helps to develop code based on logical conditions. In general, taking some action based on some condition is ‘true’ or ‘false’ is possible to accomplish by IF ELIF ELSE condition.

Note: Whenever user enters input value, Python converts that in to ‘STRING’ by DEFAULT.

Example: Creating simple calculator using Python ‘IF’ condition

num1 = float(input("Enter first number: "))
op = input("Enter operator: ")
num2 = float(input("Enter second number: "))

if op == '+':
===>print(num1 + num2)
elif op == '-':
===>print(num1 - num2)
elif op == '/':
===>print(num1 / num2)
elif op == '*':
===>print(num1 * num2)
else:
===>print("Invalid Operator")

... Click here for full details

---

Tuples in Python:

It is a type of data structure. It is a container to store different values. Specially values that are immutable.

Example 1:

Coordinates = (3, 6)


Example 2:

Users = (“hello1”, “simple”, 10, “john”, 50.45)


Example 3 ('List' of 'Tuples'):

Multi_coordinates = [(2, 3), (5, 7), (4,9)]

... Click here for full details

---

Python Translator:

Option 1:

def translate(phrase):
===>translation = ""
===>for letter in phrase:
======>if letter in "AEIOUaeiou":
=========>translation = translation + "g"
======>else:
=========>translation = translation + letter
===>return translation

print(translate(input("Enter phrase: ")))

Result:

Enter phrase: dog
dgg

... Click here for full details

---

Python Translator with examples

Python Translator:

Option 1:

def translate(phrase):
===>translation = ""
===>for letter in phrase:
======>if letter in "AEIOUaeiou":
=========>translation = translation + "g"
======>else:
=========>translation = translation + letter
===>return translation

print(translate(input("Enter phrase: ")))

Result:

Enter phrase: dog
dgg

... Click here for full details

---

Python List Functions with Examples

Python List Functions:

Examples:

• index
• extend
• append
• insert
• remove
• clear
• pop
• count
• sort
• reverse
• copy

... Click here for full details

---

Python Data Structures and Data Types

NAME	TYPE	DESCRIPTIONS
Integers	int	Whole numbers, such as 1, 2, 10, 20, 30, 35...
Floating point	float	Numbers with decimal points: 3.5, 2.3, 10.95, 200.75...
Strings	str	Ordered sequence of characters: "apple", "bike", "house", "32457", hello123"...
Lists	list	Ordered sequence of objects (these are mutable): ["Apples", 100, "street123", 500.75]
Tuples	tup	Ordered sequence of objects (these are immutable): ("Oranges", 500, "best123", 700.35)
Dictonaries	dict	Unordered Key:Value pairs: {"thekey":"thevalue","fruit":"oranges","autos":"cars"}
Sets	set	Unordered collection of unique objects: {"apple", "mango", "orange"}
Booleans	bool	Logical value indicating True or False

... Click here for full details

---

Python Exponent Function with examples

Python Exponent Function Definition:

If you code: print(2**4), this will give the result as: 16.

How to build exponent functions:

Example 1:

def raise_to_power(base_number, power_number):
===>result = 1
===>for index in range(power_number):
======>result = result * base_number
===>return result

print(raise_to_power(2, 4))


Result:

16

... Click here for full details

---

What is Python dictionary explain with examples

Python Dictionary Definition:

Dictionary is collection of key and value pairs. These key value pairs need not be in any specific order. But dictionaries mutable and indexed.

Example: Creating Month Conversion using Dictionary concept

monthConversions = {
===>"Jan": "January",
===>"Feb": "February",
===>"Mar": "March",
===>"Apr": "April",
===>"May": "May",
===>"Jun": "June",
===>"Jul": "July",
===>"Aug": "August",
===>"Sep": "September",
===>"Oct": "October",
===>"Nov": "November",
===>"Dec": "December"
}
... Click here for full details

---

What is Python Variable, Expression and Statement

What is variable

It is a place where we can store values. Instead of using the values directly, we can refer the variable name where the actual values are stored.

Example
> x = 2 === > here X is Variable
> name = 'John' === > here NAME is variable

What is Expression

It contains values, variables and operators.

Example
> 10
> x
> y = x + 10

... Click here for full details

---

Boolean Expressions, Comparison Operators and Examples with sample code in Python

Boolean Expression in Python

Boolean Expression helps in confirming True OR False given a comparison.

Example
> 4 == 4
True
> 6 == 2
False

True AND False are not strings. They belong to type bool.
We can validate the type by using the following example code. > type(True)
type 'bool'
> type(False)
type 'bool'

... Click here for full details

---