Module 3.ipynb

Kernel: Python 3

Operators

• Binary

• Unary

• Priorities

• Binding

Bitwise

• Bitwise not ~

• And &

• Xor ^

• Shift left <<

• Shift right >>

~2

-3

2 & 3

2

1 ^ 4

5

Boolean Operation

• And

• OR

x = 7
y = 3
x > y and (x-y) < y

False

x = 7
y = 3
x > y or y > x

True

Relational operators

• Equals =

• Not equals !=

• Greater than >

• Greater or equal >=

• Less than <

• Less or equal <=

'Dublin' == 'dublin'

False

5 > 2

True

4 <= 8

True

IO Operations

• input()

• print()

• int()

• float()

• str()

• len()

type(int("25"))

int

type(float('6.54'))

float

len('Dublin')

6

Type Casting (Conversion of Data Stream to another type)

x = 1
y = 5
my_string = "{} + {} = {}".format(x,y,x+y)
my_string

'1 + 5 = 6'

Conditional Operators

• If

• If-else

• If-elif

• If-elif-else

x = 2
y  = 4
if x > y:
    print("X is of larger value")
else:
    print("X is not larger in value than Y")

X is not larger in value than Y

x = 2
if x == 2:
    pass

x = 3
y = 4
if x > 5:
    print("X is not 0")
elif y == 2:
    print("Value of Y is 2")
else:
    print("X is not 1 and Y is 2")

X is not 1 and Y is 2

Loops

• For

• While

for i in range(5):
    print(i)

0
1
2
3
4

i = 1
while True:
    print(i)
    if i == 10:
        break
    else:
        i = i + 1

Sequences

• Set

• Tuple

• List

• Dict

a = set((1,2,3,4,5))
for i in a:
    print(i)

1
2
3
4
5

a = list([1,2,3,4,5])
for i in a:
    print(i)

1
2
3
4
5

for i in range(10):
    print(i)
    if i == 8:
        break
else:
    print("Didnt finish gracefully")

0
1
2
3
4
5
6
7
8

for i in range(10):
    if i % 2 == 0:
        continue
    print("This number {} is odd!".format(i))

This number 1 is odd!
This number 3 is odd!
This number 5 is odd!
This number 7 is odd!
This number 9 is odd!

# break - example

print("The break instruction:")
for i in range(1, 6):
    if i == 3:
        break
    print("Inside the loop.", i)
print("Outside the loop.")


# continue - example

print("\nThe continue instruction:")
for i in range(1, 6):
    if i == 3:
        continue
    print("Inside the loop.", i)
print("Outside the loop.")

The break instruction:
Inside the loop. 1
Inside the loop. 2
Outside the loop.

The continue instruction:
Inside the loop. 1
Inside the loop. 2
Inside the loop. 4
Inside the loop. 5
Outside the loop.

i = 1
while i < 5:
    print(i)
    i += 1
else:
    print("else:", i)

1
2
3
4
else: 5

# Example 1
word = "Python"
for letter in word:
    print(letter, end="*")

# Example 2
for i in range(1, 10):
    if i % 2 == 0:
        print(i)

P*y*t*h*o*n*2
4
6
8

text = "pyxpyxpyx"
for letter in text:
    if letter == "x":
        continue
    print(letter, end="")

pypypy