JNTUADATASCIENCE

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Day2 Agenda:

• Hello World...!

• Checking your python version

• comments

• Variable creation

  • A variable in programming is used to store the values/data
  • single variable assignment
  • Multi variable assignment

• Indentation

• Data Types

  • Text Type: str
  • Numeric Types: int, float, complex
  • Sequence Types: list, tuple, range
  • Mapping Type: dict
  • Set Types: set, frozenset
  • Boolean Type: bool

• Type Casting

• Dynamic Input Reading

• Operators

  A. Arithmetic Operators ( +,-,%,/,//,*)

  B. Assignment Operators ( =, +=, -=, *=, %=, /=, //=)

  C. Comparison operators ( ==, >=, <=, !=, >, < )

  D. Logical operators ( and, or, not )

  E. Bitwise Operators ( &, |, ~, ^, >>, <<)

  F. Identity Operators ( is , is not )

  G. Membership Operators ( in , not in )

Day5 Agenda

Strings

• Set of Characters
• Sequence of characters
• Strings are immutable
• any sequence of characters either with in single or double quotes
• A data type that stores a sequence of elements in character form.
• String Slicing
  • Indexing was only limited to accessing a single element, Slicing on the other hand is accessing a sequence of data inside the string.
• String Methods

Day6 Agenda

Data Structures

• Data structures refer to the collection or group of data in a particular structure.

List

Lists are the most commonly used data structure. Think of it as a sequence of data that is enclosed in square brackets and data are separated by a comma. Each of these data can be accessed by calling it's index value.

Lists are declared by just equating a variable to '[ ]' or list. We can use lists to hold an ordered sequence of values.

It holds different types of variables in the same list

Lists are mutable, their contents can change as more statements are interpreted.

Methods

Method Name	Use	Explanation
append	alist.append(item)	Adds a new item to the end of a list
insert	alist.insert(i,item)	Inserts an item at the ith position in a list
pop	alist.pop()	Removes and returns the last item in a list
sort	alist.sort()	Modifies a list to be sorted
reverse	alist.reverse()	Modifies a list to be in reverse order
del	del alist[i]	Deletes the item in the ith position
index	alist.index(item)	Returns the index of the first occurrence of item
count	alist.count(item)	Returns the number of occurrences of item
remove	alist.remove(item)	Removes the first occurrence of item