Article Outline
Example Python program python_basic.py For Python version 2.x. To test your Python version use:
python --versionModules
- #import decimal
Code
Python example
%reset -f
#%%
#Numbers
print(2+2)
print(2*2)
print(5-3)
print(4/2)
#the calculation will happen as per per arithmatic precedence
print(2*2+3-4)
print(9*5+1-7)
print(3*2+2-3)
print(4*6+9-1)
print(4*9+7+1)
print(4*9+3-1)
#this is happening as() has more arithmatic precedence then *
print(2*(2+3))
#different data type used in python(int,float,string,byte,list)
type(6)
type(6.4)
type(7.5)
type(3.2)
type(2.8)
type(9.9)
type('3.7')
type('6.4')
type('4.2')
type('1.9')
type('8.3')
type('1.4')
#Python supports a range of types to store sequences. There are six sequence
#types: strings, byte sequences (bytes objects), byte arrays (bytearray objects),
# lists, tuples, and range objects.
#sequence:Sequences allow you to store multiple values in an organized and
#efficient fashion. There are seven sequence types: strings, Unicode strings,
#lists, tuples, bytearrays, buffers, and xrange objects. Dictionaries and sets
# are containers for sequential data.
type(b'6.4')
type([6.4])
type([2.6])
type([5.4])
#works perfectly for bot single and double quotes.
type(["list"])
type(["Python"])
type(["Oracle"])
type(["Mongo"])
type(['list'])
type(['Python'])
type(['Oracle'])
type(['Mongo'])
#We can perform a floor division by using two forward slashes (//)
#to divide and have the result as an integer.
4 // 2
8 // 2
85 // 5
75 // 5
15 // 3
16 //16
#modulus operatior will let remain the reminder
5 % 4
4 % 2
96 % 16
13 % 2
11 % 5
12 % 8
#power using the using two asterisk symbols
2 ** 4
3 ** 5
1 ** 9
5 ** 4
# this is the (1/square root) function used against the number
64 ** (-1/2)
25 ** (-1/2)
27 ** (-1/3)
8878 ** (-1/4)
1000000 ** (-1/4)
#exponentiation (**) has higher precedence than * or / or unary -
4 * - 3 ** 2
3 * - 3 ** 4
9 * - 3 ** 2
4 * - 5 ** 4
2 * - 7 ** 3
#priority is with () i.e.(4 * (-3))
(5 * (- 5)) ** 2
(2 * (- 3)) ** 3
(3 * (- 4)) ** 2
(4 * (- 1)) ** 4
(4 * (- 3)) ** 3
(9 * (- 8)) ** 3
(6 * (- 6)) ** 2
#priority is with () i.e.((- 3) ** 2)
4 * ((- 3) ** 2)
print(1.1 + 2.2)
#it will give a 'precesion' upto 15 numbers,to overcome this issue
#import decimal
#print(decimal.Decimal(01.1 + 2.2))
#A complex number is represented as a+bi where a and b are real numbers,
#like 7 or 12, and i is an imaginary number.
-1+5.5j
type(-1+5.5j)
#as described above it will automatically give a CN as (a+bj)
complex(3,-2)
complex(2,-1)
complex(3.5,-2.9)
#it will give a complex number automatically.
Z = complex(3.6, 2.7)
print(Z)
#we can check boolean with integers
bool(1)
bool(0)
bool(3j)
#The following will give a false boolean
bool(0j)
bool("")
#%%
#Variables
#Must begin with a letter (a - z, A - B) or underscore (_)
#Other characters can be letters, numbers or _,Case Sensitive
#Can be any (reasonable) length
#A String
Item_name = "Watch"
#An Integer
Item_qty = 10
#a floating number
Item_value = 1000.23
#we can also write this way
float = float(7.43)
print(float)
#using double quotes makes it easy to include apostrophes
#(whereas these would terminate the string if using single quotes
mystring = "Don't worry ! just difference between single and double quotes"
print(mystring)
one = 1
two = 2
#print(three)
#the error is "name 'three' is not defined
three = one + two
print(three)
#using single quote and double quote
s = "A Poor Woman's Journey."
print(s)
p = "The dog on the road"
print(p)
#it can be written in this way
a = ("The dog on the road")
a
#accessing characters from a string
a = "Python string"
a[2]
a = "Python string"
a[8]
a = "Roaring lion"
a[2]
a = "Leopard"
#a[9] -/ error at this line as no text at index 9 exists.
#ERROR -/string index out of range AS character with index 9 doesn't exist
#if i want to see the t th charater in the string
a[4+3]
#a[2.3] will show an error 'string indices must be integers'
#implies the character in the reverse order
a[-2]
a = "PYTHON"
#a[0] = "X"
#ERROR -/ str' object does not support item assignment
b = "X"+ a[1]
print(b)
#String concatenation
a = "Python" + "String"
print(a)
a = "Python"
b = "String"
print(a+b)
a = "Oracle"
b = "Database"
#we can also write it in a differnt way
a+=b
print(a)
a = "Python"
b = "<" + a*3 +">"
print(b)
#String length-/ len() is a built-in function which returns no of characters in a string
a = "Python"
len(a)
#we can try little different thing as follows.
a = "The morning sunshine"
b = "is awesome"
a+=b
len("print(a)")
len(a)
s = "Python"
#s[1:4] is 'yth' chars starting at index 1 and extending up to but not including index 4
#s[1:] is 'ython' omitting either index defaults to the start or end of the string
#s[:] is 'Python' Copy of the whole thing
#s[1:100] is 'ython' an index that is too big is truncated down to the string length
#It also supports the negetive index number count
#s[-1] is 'n' -- last char (1st from the end)
#s[-4] is 't' -- 4th from the end
#s[:-3] is 'pyt' -- going up to but not including the last 3 chars
#s[-3:] is 'hon' -- starting with the 3rd char from the end and extending to the end of the string.
a = "Python String"
print (a[0:5])
print(a[:8])
#here the concept START-STOP-STEP comes in to picture.will start at
a = "Python String"
print(a[0:3:2])
#here the concept START-STOP-STEP comes in to picture.will start at 3,
#stops at t and steps 2x
a = [ 1, 2, 3, 4, 5, 6, 7, 8]
print(a[2:7:2])
a= ('The best way to do it')
print(a[1:3:4])
#python string formatting
#the argument passed here is str.format(*args, **kwargs)
'{} {}'.format('Python','Format')
#the same is also for integers
'{} {}'.format(50, 70)
#it gives the number as '50 70'
'{} {}'.format(10,20)
#'10 20'
'{} {}'.format('News','Nation')
# 'News Nation'
'{1} {0}'.format('News','Nation')
#'Nation News'
'{}{}'.format('Qlik', 'View')
#'QlikView'
'{1}{0}'.format('Qlik', 'View')
#'ViewQlik'
'{0}{0}'.format('Qlik', 'View')
'QlikQlik'
'{1}{1}'.format('Qlik', 'View')
#Padding and aligning strings
#alligning to the Right(>30)
'{:>30}'.format('Seychelles')
#' Seychelles'
#alligning to the left(<40)
'{:<40}'.format('character') '
#Align center
'{:^40}'.format('Python')
' Python '
'{:^20}'.format('Newspaper')
#' Newspaper '
'{:^25}'.format('Formatting')
' Formatting '
#Truncating the string(it will print till 10 where 10 will be included)
'{:.10}'.format('Python Schedule')
#'Python Sch'
'{:.6}'.format('Application Deployment')
'Applic'
#This can be done in a different way,giving the index value at the last.
'{:.{}}'.format('Application Deployment',10)
#'Applicatio'
'{:.{}}'.format('Table of content',12)
#'Table of con'
#%%
#List
#the list contains all integer values
my_list1 = [5, 12, 13, 14]
print(my_list1)
my_list2 = [0, 3, 2, 11]
print(my_list2)
my_list3 = [9, 11, 2, 28]
print(my_list3)
# the list contains all string
new_list1 = ['red', 'blue', 'black', 'white']
print(new_list1)
new_list2 = ['dog', 'cow', 'sheep', 'cock']
print(new_list2)
# the list contains a string, an integer and
new_list3 = ['blue', 50, 44.20]
print(new_list3)
new_list4 = ['red', 25,50.55]
print(new_list4)
new_list5 = ['black', 28, 11.65]
print(new_list5)
new_list6 = ['yellow', 12, 10.32]
print(new_list6)
c_lst1 = ["White", "Yellow"]
c_lst2 = ["Red", "Blue"]
c_lst3 = ["Green", "Black"]
colours_list = c_lst1 + c_lst2 + c_lst3
print(colours_list)
# empty list
list = []
print(list)
#<class 'list'>
number = [1,2,3,4,5,6,7,8,9]
print(number[0]*4)
print(number[2]*5)
print(number[3]**4)
print(number[2]**3)
print(number[-5]**5)
#Insert an item at third position
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list[2] = "white"
print(colours_list)
#another method add a number at certain position
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.insert(3,"White")
print(colours_list)
#Remove an item from the list
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.remove('Blue')
print(colours_list)
#Clearing of all items from a list
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.clear()
print(colours_list)
#List Slicing
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
print(colours_list[0:2])
print(colours_list[1:3])
print(colours_list[2:-1])
print(colours_list[-4:-1])
#Creates copy of original list
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
print(colours_list[:])
#Remove the item at the given position in the list, and return it
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
print(colours_list.pop(2))
print(colours_list)
#Return the index in the list of the item
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
print(colours_list.index("Red"))
#Return the number of times 'x' appear in the list
colours_list=["Red", "Blue", "Green", "Black", "Blue"]
colours_list.count("Blue")
#Sort the items of the list in place(Reversing alphabetically
#(reverse = False is alphabatically ascending))
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.sort(key=None, reverse=False)
print(colours_list)
#Reverse the elements of the list in place(just reversed first and last)
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.reverse()
print(colours_list)
#Reverse a list
even = [2,4,6,8]
even.sort(reverse = True)
print(even)
#Return a shallow copy of the list
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list.copy()
print(colours_list)
#Lists are Mutable(change any item in the list)
colours_list = ['Yellow', 'Red', 'Blue', 'Green', 'Black']
colours_list[2] = "Pink"
print(colours_list)
#Convert a list to a tuple
list = [1,2,3,4,5]
tuple = tuple(list)
print(tuple)
#use of the START:STOP:STEP in a list
list = [1,2,3,4,5,6,7,8,9,10]
print(list[3:9:2])
print(list[6:4:2])
#Find the largest and the smallest item in a list
list = [1,2,3,4,5,6,7,8,9,10]
print(max(list))
print(min(list))
#Compare two lists in Python
list1, list2=[3, 5, 7, 9], [3, 5, 7, 9]
print(list1 == list2)
list1, list2=[3, 5, 7, 9, 8], [3, 5, 7, 9, 4]
print(list1 == list2)
#
list1, list2=[3, 5, 7, 9], [3, 5, 7, 9]
if list1 ==list2:
print("The lists are equal")
#order and compare
print(list1.sort() == list2.sort())
#print the indexing of the list
list1 = ['H', 'E', 'L', 'L', 'O', ' ', 'W', 'O', 'R', 'L', 'D']
index =list1.index('L')
print(index)
##define the index from which you want to search
index = list1.index("L", 4)
print(index)
##define the segment of the list to be searched
index = list1.index("O", 3, 5)
print(index)
#Using Lists as Stacks
color_list=["Red", "Blue", "Green", "Black"]
print(color_list)
color_list.append("White")
color_list.append("Yellow")
print(color_list)
color_list.pop()
color_list.pop()
color_list.pop()
color_list
#%%
#Dictionary
#(EMPTY DICTIONARY)
new_dict = dict()
print(new_dict)
new_dict = {}
print(new_dict)
#Dictionary with key-vlaue
colour = {"key1":"red","key2":"green","key3":"blue","key4":"white","key5":"black"}
print(colour)
#Get value by key in Python dictionary
colour = {"key1":"red","key2":"green","key3":"blue","key4":"white","key5":"black"}
colour["key1"]
colour["key5"]
colour["key2"]
#Adding a new value to a dictionary
colour = {"key1":"red","key2":"green"}
colour["key3"] = ("Black")
colour
number = {1:22.55,2:55.89,3:60.21}
number[4]=61.08
number
## update() method to add key-values
number = {1:22.55,2:55.89,3:60.21}
number.update({4:60.19})
number
number = {'a':22.55,'b':55.89,'c':60.21}
number.update({'d':58.98})
number
#Iterating Python dictionaries using for loops
dict = {"a":1,"b":2,"c":3,"d":4}
for dict_key, value in dict.items():
print(dict_key, ' represent ', dict[dict_key])
#2
colour = {"a":"red","b":"green","c":"blue"}
for colour_key,value in colour.items():
print (colour_key, 'corresponds to',colour[colour_key])
#3
dict = {"a":"Arjun","b":"Aryan","c":"Arnab","d":"Arif"}
for dict_key, value in dict.items():
print(dict_key, 'corresponds to ', dict[dict_key])
#4
dict = {"a":"Prob","b":"Prod","c":"Prof","a":"Prom"}
for dict_key, value in dict.items():
print(dict_key , 'represents the begining of a word ', dict[dict_key])
#Remove a key from a Python dictionary
dict = {"a":1,"b":2,"c":3,"d":4}
if 'a' in dict:
del dict['a']
print(dict)
if 'b' in dict:
del dict['b']
print(dict)
if 'c' in dict:
del dict['c']
print(dict)
# sort dictionary by key
color_dict = {'red':'#FF0000',
'green':'#008000',
'black':'#000000',
'white':'#FFFFFF'}
for key in sorted(color_dict):
print("%s: %s" % (key,color_dict[key]))
#finding a max and min value in dictionary
my_dict = {'x':500, 'y':5874, 'z': 560}
key_max = max(my_dict.keys(), key = (lambda k: my_dict[k]))
key_min = min(my_dict.keys(), key = (lambda k: my_dict[k]))
print('Maximum value: ', my_dict[key_max])
print('Minimum value: ', my_dict[key_min])
#Concatenate two Python dictionaries into a new one
dict1 = {1:10,2:20}
dict2 = {4:40,5:20}
dict3 = {}
for d in (dict1, dict2): dict3.update(d)
print(dict3)
#
dict1 = {'a':20,'b':50}
dict2 = {'c':25,'d':30}
dict3 = {}
for d in (dict1,dict2): dict3.update(d)
print(dict3)
#
dict1 = {"key1":"Orange","key2":"Purple"}
dict2 = {"key3":"Brown","key4":"White"}
dict3 = {}
for d in (dict1,dict2): dict3.update(d)
print(dict3)
#Find the length of a Python dictionary
dict1 = {"key1":"Orange","key2":"Purple"}
print(len(dict1))
dict2 = {"key3":"Brown","key4":"White"}
print(len(dict2))
#%%
#Tuple
#empty tuple
tuple = ()
print(tuple)
##create a tuple with different data types
tuple1 = ('tuple', False, 3.2, 1)
print(tuple1)
##create a tuple with numbers, notation without parenthesis
tuple2 = 1,2,3,4,5,6
print(tuple2)
##create a tuple of one item, notation without parenthesis
tuple4 = 4,
print(tuple4)
##create a tuple from a iterable object
tuple5 = ([True,False])
print(tuple5)
#get item from a tuple(first,last,middle)
tuple6 = ("w", 3, "r", "e", "s", "o", "u", "r", "c", "e")
tuple6[3]
tuple6[5]
tuple6[-4]
tuple6[-6]
# know if an element exists within a tuple
tuple6 = ("w", 3, "r", "e", "s", "o", "u", "r", "c", "e")
print("r" in tuple6)
print("o" in tuple6)
print("z" in tuple6)
print(5 in tuple6)
#conversion of List to tuple
#lst = [1,2,3,4,5,6]
#tup = tuple(lst)
#print(tup)
#Add item in Python tuple
#using merge of tuples with the + operator you can add an element and
#it will create a new tuple
tuple = (1,2,3,4,5,6)
tuple1 = tuple+(7,)
print(tuple1)
##adding items in a specific index
tuple = (1,2,3,4,5,6)
tuple1 = tuple[:4] + (15, 20, 25, 30, 35) + tuple[:5]
print(tuple1)
#
tuple = (1,2,3,4,5,6)
tuple1 = tuple[:2] + (3,4,5,6,7,8,9) + tuple[:-5]
print(tuple1)
#
tuple = (1,2,3,4,5,6,7,8,9)
tuple1 = tuple[:6] + (11,12,13,14,15,16,17,18)+ tuple[:-2]+(1,2,3)
print(tuple1)
#return the number of times it appears in the tuple.
tuple = 2, 4, 5, 6, 2, 3, 4, 4, 7
count = tuple.count(4)
print(count)
#
tuple = (1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 15, 16, 17, 18, 1, 2, 3, 4, 5, 6, 7, 1, 2, 3)
count = tuple.count(1)
print(count)
count = tuple.count(2)
print(count)
count = tuple.count(3)
print(count)
#Remove an item from a tuple
##using merge of tuples with the + operator you can remove an item and it will
#create a new tuple,Below example "d" is removed
tuple = ("w", 3, "d", "r", "e", "s", "l")
tuple1 = tuple[:2] + tuple[3:]
print(tuple1)
#Slicing a tuple
tuple = (2, 4, 3, 5, 4, 6, 7, 8, 6, 1)
_slice1 = tuple[2:5]
print(_slice1)
_slice2 = tuple[:6]
print(_slice2)
_slice3 = tuple[:-6]
print(_slice3)
_slice4 = tuple[-8:-4]
>>> print(_slice4)
#Find the index of an item of the tuple
tuple = (2, 4, 3, 5, 4, 6, 7, 8, 6, 1)
print(tuple.index(8))
print(tuple.index(5))
#
tuple = ('i', 'n', 'd', 'e', 'x', ' ', 't', 'u', 'p', 'l', 'e')
index = tuple.index('x')
print(index)
index = tuple.index('p', 5)
print(index)
##define the segment of the tuple to be searched
index = tuple.index("e", 3, 6)
print(index)
#The size of a tuple
tuple = (2, 4, 3, 5, 4, 6, 7, 8, 6, 1)
print(len(tuple))
#Slice of a tuple using step parameter
tuple = ('H', 'E', 'L', 'L', 'O', ' ', 'W', 'O', 'R', 'L', 'D')
#tuple[start:stop:step]
_slice = tuple[2:9:2]
print(_slice)
#Modify items of a tuple
tuple = ("w", 3, "r", [], False)
# #tuples are immutable, so you can not modify items which are also immutable,
# as str, boolean, numbers etc.
tuple[3].append(200)
print(tuple)
tuple = ('H', 'E', 'L', 'L', 'O', ' ', 'W', 'O', 'R', 'L', 'D')
tuple[5].append('Q')
print(tuple)
#Iterators and iterable objects
string = "1234567890"
for char in string:
print(char)
#
string = "1234567890"
for char in iter(string):
print(char)
#using for loop
my_list = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]
my_iterator = iter(my_list)
for i in range(0,len(my_list)):
next_item = next(my_iterator)
print(next_item)
#043 Understanding and using Ranges
print(range(100))
my_list = list(range(10))
print(my_list)
#using START:STOP:STEP
even = list(range(0,100,2))
odd = list(range(1,100,2))
print(even)
print(odd)
#Range does't support all the operations like mode,concartenation(append)
small_decimals = range(0,10)
print(small_decimals)
print(small_decimals.index(3))
# to see the 'ODD' number in a range
odd = range(1, 1000, 2)
print(odd)
#
seven = range(7, 100000, 7)
x = int(input("please a number less than one million : "))
if x in seven:
print("{} is divisible by seven".format(x))
#
my_range = small_decimals[::2]
print(my_range)
print(my_range.index[4])
#
decimals = range(0,100)
my_range = decimals[3:40:3]
print(my_range)
for i in my_range:
print(i)
#True False check
print(range(0, 5, 2)) == print(range(0, 6, 2))
#why it happened like this ,let's see...it gives the same value
print(list(range(0, 5, 2)))
print(list(range(0, 6, 2)))
#
r = range(0,100)
for i in r:
print(i)
r = range(0,99)
for i in r:
print(i)
#
r = range(0, 10)
for i in r[::-1]:
print(i)
#
o = range(0, 100, 4)
print(o)
p = o[::5]
for i in p:
print(i)
#%%
#026 An Introduction To Program Flow Control
for i in range(1, 12):
print(i)
#
for i in range(1, 12):
print("no {} squared is {} and cube is {:4}".format(i, i**2, i**4))
#027 Test Conditions With If ElIf Else
name = input("Please enter your name: ")
age = input("How old are you, {}?".format(name))
print(age)
#now we can change the data type in "age" as an integer
name = input("Please enter your name: ")
age = int(input("How old are you, {}?".format(name)))
print(age)
#
if age >= 18:
print("you are old enough to vote")
else:
print("Please come back in {0} years".format(18-age))
#
#Use the in operator in an if statement
s = 'jQuery'
#create a list
l = ['JavaScript', 'jQuery', 'ZinoUI']
# in operator is used to replace various expressions that use the or operator
if s in l:
print(s + ' Tutorial')
#Alternate if statement with or operator
if s == 'JavaScript' or s == 'jQuery' or s == 'ZinoUI':
print(s + ' Tutorial')
#
a=10
if(a>10):
print("Value of a is greater than 10")
else :
print("Value of a is 10")
#
x = 1+2j
if (type(x) == int):
print("variable is an integer")
elif (type(x) == float):
print("variable is an float")
elif (type(x) == dict):
print("variable is an dictionaries")
elif (type(x) == complex):
print("variable is an complex")
elif (type(x) == bool):
print("variable is an bool")
elif (type(x) == string):
print("variable is an string")
elif (type(x) == tuple):
print("variable is an tuple")
elif (type(x) == list):
print("variable is an list")
else:
print("Type is unknown")
#
age = 25
if (age>=10):
print("You are eligible to see")
if (age <= 20 or age >= 60):
print("Ticket price is 1000")
else:
print("Ticket price is 1500")
else:
print("Better luck next time")
#
#Use the and operator in an if statement
x = False
y = True
if x and y:
print('Both x and y are True')
else:
print('x is False or y is False or both x and y are False')
#
#Write an if-else in a single line of code
n = 150
print(n)
#if n is greater than 500, n is multiplied by 7, otherwise n is divided by 7
result = n * 7 if n > 500 else n / 7
print(result)
#
#Define a negative if
x = 20
print(x)
#uses the not operator to reverse the result of the logical expression
if not x == 50:
print('the value of x different from 50')
else:
print('the value of x is equal to 50')
#
print("Please guess a number between 0 and 10 :")
guess = int(input())
if guess <5:
print("Print guess higher")
guess = int(input())
if guess ==5:
print("You guessed it correctly")
else:
print("Please choose a higher number")
elif guess >5:
print("Please guess it lower")
if guess == 5:
print("You guessed it correctly")
else:
print("Please choose a higher number")
else:
print("you got it right first time")
#FOR LOOP
color_list = ["Red", "Blue", "Green", "Black"]
for c in color_list:
print(c)
#
for a in range(4):
print(a)
for a in range(2,7):
print(a)
for a in range(2,19,5):
print(a)
for i in range(0,100,10):
print("i is {}".format(i))
for i in range(1,13):
for j in range(1,13):
print("{1} times {0} is {2}".format(i, j, i*j),end='\t')
print("===============")
#
numbers = (1, 2, 3, 4, 5, 6, 7, 8, 9)
count_even = 0
count_odd = 0
for x in numbers:
if x %2:
count_odd+=1
else:
count_even+=1
print("Number of even numbers :",count_even)
print("Number of odd numbers :",count_odd)
#
datalist = [1452, 11.23, 1+2j, True, 'w3resource', (0, -1), [5, 12],
{"class":'V', "section":'A'}]
for item in datalist:
print ("Type of ",item, " is ", type(item))
#
color = {"c1": "Red", "c2": "Green", "c3": "Orange"}
for key in color:
print(key)
#
color = {"c1": "Red", "c2": "Green", "c3": "Orange"}
for value in color.values():
print(value)
#031 Extending For Loops
number = "9,223,372,036,854,775,807"
cleanedNumber = ''
for char in number:
if char in '0123456789':
cleanedNumber = cleanedNumber + char
newNumber = int(cleanedNumber)
print("The number is {}".format(newNumber))
#
number = "111,221,31,478,511,675,714,878,992"
cleanedNumber = ''
for char in number:
if char in '0123456789':
cleanedNumber = cleanedNumber + char
newNumber = int(cleanedNumber)
print("The number is {}".format(newNumber))
#
#this is same as print("The asian country is {}"+country)
for country in ["India","China","Japan","Israel","Jordan","Cyprus","Cambodia","Brunei"]:
#print("The asian country is " + country)
#print("The asian country is {}".format(country))
#
#While loop
x = 0;
while x <5:
print(x)
x+=1
#Look the example as it will display no RETURN
x = 10;
while x <5:
print(x)
x+=1
#
x = 0;
s = 0
while (x < 10):
s = s + x
x = x + 1
else :
print('The sum of first 9 integers : ',s)
#while loop with if-else and break statement
x = 1;
s = 0
while (x < 10):
s = s + x
x = x + 1
if (x == 5):
break
else :
print('The sum of first 9 integers : ',s)
print('The sum of ',x,' numbers is :',s)
#032 Understanding Continue Break And Else
shopping_list = ["Milk","Vegetable","Pasta","Egg","Bread"]
for i in shopping_list:
if i == "Milk":
continue
#break
print("Buy"+ i)
#
for letter in 'python':
if letter == 'y':
break
print('Current letter:',letter)
#else:
#print('letter')
#
var = 10
while var > 0:
var = var -1
if var == 5:
continue
print('current value:', var)
print('Good Bye !')
#
for num in range(10,20):
#to iterate between 10 to 20
for i in range(2,num):
#to iterate on the factors of the number
if num%i == 0:
#to determine the first factor
j=num/i
#to calculate the second factor
print '%d equals %d * %d' % (num,i,j)
break
#to move to the next number, the #first FOR
else:
# else part of the loop
print num, 'is a prime number'
#for num in range(10,20):
# for i in range(2,num):
# if num%1 ==0:
# j=num/i
# print ('%d equals %d * %d' %(num,i,j))
# break
# else:
# print(num , 'is a prime number')
#033 Augmented Assignment
number = "9,223,372,036,854,775,807"
cleanedNumber = ''
for i in range(0, len(number)):
if number [i] in '0123456789':
cleanedNumber += number[i]
new_number = int(cleanedNumber)
print("the number is {} ".format(new_number))
#
x = 23
x+=1
print(x)
#
x = 24
x-=1
print(x)
#
x = 55
x/=5
print(x)
#
x = 25
x*=4
print(x)
#
x**=4
print(x)
#
x %=60
print(x)
#
greeting = "Good"
greeting += "Morning"
print(greeting)
#048 Binary Basics,049 What is binary
#
#
# Input and Output (IO) in Python
file = open("C:\\Users\\Manas\\Desktop\\sample.txt",'r')
for line in file:
print(line)
#with general statement
file = open("C:\\Users\\Manas\\Desktop\\sample.txt")
data = file.read()
print(data)
#now by using "with"
with open ("C:\\Users\\Manas\\Desktop\\sample.txt") as file
data = file.read()
print(data)
#converting all the lines in the text to lower case
with open("C:\\Users\\Manas\\Desktop\\sample.txt") as file:
for line in file:
line = line.lower()
print(line)
#converting all te lines in the text file as upper case
file = open("C:\\Users\\Manas\\Desktop\\sample.txt")
data = file.read()
print(data)
for line in data:
lines = line.upper()
print(lines)Useful Links
- Articles: https://python-commandments.org/
- Python shell: https://bsdnerds.org/learn-python/
- Tutorial: https://pythonprogramminglanguage.com/