Vinay Mavi
A fullstack developer curious to explore every thing in web development domain.
@vinaymavi
Agenda
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 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 <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
Operators
Operators
Operators
Operators
Operators
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.
By Vinay Mavi
Python: Loop,Datatypes operation, function, variable scooping, packages, package import, classes
A fullstack developer curious to explore every thing in web development domain.