@vinaymavi

Agenda

Expression vs Statement
Loops
Datatype operations and utility functions
Function
Lemda Function
Variable Scoping
Data type casting
Operators
List Comprehension

Expression Vs Statement

Expression

Expression are code snippets that return some result.

#
2+2 

#
True 
#
def add(a,b):
    return a+b
#
add()

#
if True:
    return "True"

"True" if 1 else "False"

Expression

if <expression>:
    <anything>

Loops

For loop

# For loop
   
for i in range(1,10):
    print 1

for i in range(1,10,2):
    print 1 

for i in range(1,10,2):
    if i == 3:
        continue    
    print 1 

# list iteration 
    

# Tuple Iteration 


#Dictionary Iteration

Loops

While loop

# While loop

while <condition>:
    <body>

Datatypes operations

Number

# parse to float 
# parse to int

String

# addition 
# formating 
# substring 
# endswith
# indexOf

List

# append
# remove 
# list slice
# list Comprehension

Dictionary

# Dictionary keys
# Remove dictionary key
# Get value from key
# Iterate Dictionary with loop

Function

def <name>(<agg1>,<arg2>):
    <body>

<name>()

Function(keyword)

def <name>(<arg1>,<arg2>):
    <body>

<name>(<arg2>=<value>,<arg1>=<value>)

Function(default)

def <name>(<arg1>,<arg2>=<value>):
    <body>

<name>(<arg1>=<value>)

Function(variable_length)

def <name>(<arg1>,*<arg2>):
    <body>

<name>(<arg1>=<value>)

def <name>(<arg1>,**<arg2>):
    <body>

<name>(<arg1>=<value>)

Lamda Function


lambda arguments : expression

my_fun = lambda x,y:"True" if x and y else "False"

print my_fun(1,0)

Scoping

str = "TOP MSG"
def print_my_msg():
    def print_local_msg():
        print str
    str = "PRINT MY MSG TOP"    
    print str
    print_local_msg()

print_my_msg()        
print str

Type Casting

Casting


(<casting_type>)<value>

Operators

List Comprehension


# print all animals that not in my_animal list

animal = ["Tiger","Lion","Bear","Cat","Dog","Rat"]
my_animal  = ["Car","Dog"]

List Comprehension


[<item> for <item> in list if <expression>]

Exercise

https://github.com/zhiwehu/Python-programming-exercises/blob/master/100%2B%20Python%20challenging%20programming%20exercises.txt

Thank you.