Peterson Solution

Using Flag Variable for Critical Section Problem

Using Turn Variable for Critical Section Problem

PRODUCER CONSUMER PROBLEM

Critical Section

Process Synchronization

CPU Scheduling

Introduction and Evolution of Operating Systems

Data Types in Python- Lecture 6- range

range Data Type:

range Data Type represents a sequence of numbers. 
The elements present in range Data type are not modifiable. i.e range Data type is immutable.

Form-1:

 range(10) generate numbers from 0 to 9

Form-2: range(10,20)

generate numbers from 10 to 19

 

Form-3: range(10,20,2)

2 means increment value by 2

 

We can access elements present in the range Data Type by using 

• loops
• index.

Using loops:

Using Index:

We cannot modify the values of range data type
Example:  
r[0]=100 
TypeError: 'range' object does not support item assignment


We can create a list of values with range data type
Example:
1) >>> l = list(range(10))
2) >>> l 
3) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Data types in Python - Lecture 5- bytes and bytearray

bytes Data Type:

bytes data type represents a group of byte numbers just like an array.
The only allowed values in bytes data type are in range of 0- 256

example:
x=[10,20,30,40,50]
b=bytes(x)
type(b)----> bytes

 

 

You can save numbers in bytes datatype object but only in a particular range(0,256)

If you try to save a number out of this range you will get ValueError:

 

In Python if you talk about range(0,256) you mean the allowed numbers are 0 to 255 , Therefore even 256 is not allowed in bytes

bytes is IMMUTABLE
therefore item assignment is not allowed

If you try so, you will get TypeError

bytearray Data type:

bytearray is exactly same as bytes data type except that its elements can be modified.