Python 3 Cheat Sheet

How to Install Python in your System?

You can install python in your system free by going to the below link:
https://www.python.org/
Once Python is installed in your system, type the command python –version; it will reflect the python’s install version.

Some Basics of Python 3 Cheat Sheet Programming

Your first python program. Type the below command print (“what is your name?”) and press the enter it will generate the output what your name is?
If you want to comment down something in python using the below procedure:
#comment which you want to put.

Python 3 Cheat Sheet

Below are topics, we are using while creating a cheat sheet in python. The below example shows the python 3 cheat sheet is as follows.

Variables

Below is the example of a variable which was we are using in python 3 are as follows:

P = 5 – here we are using integer value as 5 and assigning 1 value to p variables.

Q = 5.1 – We have used the floating-point number as 5.1 and assigned this value to Q.

R = 1 + 2j – This variable is nothing but the complex number.

d = “a” – string variables

e = True # Boolean variables (True or False)

Code:

P = 5

Q = 10

R = P + Q

print (R)

Output:

String

Below example shows python 3 cheat sheet string are as follows.

a = “cheatsheet”

len (p)

p [0]

p [-1]

# Formatted strings

Stud_name = f”{first}”

# String methods

p.upper ()

p.lower ()

p.title ()

p.strip ()

p.find (“p”)

p.replace (“q”, “r”)

Code:

py = “python”

print (len (py))

Output:

Type conversion

Below example shows python 3 cheat sheet type conversion are as follows.

int(x)

float(x)

bool(x)

string(x)

Code:

p = 5

print (“p type is:”, type(p))

q = 5.7

print (“q type is:”, type(q))

Output:

Falsy Value

The below example shows python 3 cheat sheet falsy values are as follows.

“”

[]

Code:

p = 0

if p:

print (p)

Output:

Conditional Statements

The below example shows python 3 cheat sheet conditional statements are as follows.

if x == 10:

print(“a”)

elif y == 20:

print(“b”)

else:

print(“c”)

Code:

p = 10

q = 20

if q > p:

print (“q is greater”)

Output:

Loops

The below example shows python 3 cheat sheet loops are as follows.

for p in range(10, 15):

print (p)

while p < 15:

print (p)

Code:

for p in range(10, 15):

print (p)

Output:

Functions

The below example shows the functions are as follows.

def multiply(*numbers):

for number in numbers:

print number

Code:

def py ():

print (“py function”)

py ()

Output:

List

The below example shows the list are as follows.

py = [“p”, “q”, “r”]

py [0]

py [-1]

Code:

py = [74, 55, 37, 19, 39, 41]

print (py)

Output:

Tuples

The below example shows tuples are as follows.

p = 10

q = 11

p, q = q, p

Code:

py = (‘pink’, ‘red’, ‘black’, ‘white’, ‘green’)

print (py)

Output:

Array

The below example shows array are as follows.

from array import array

num = arr (“p”, [11, 12, 13])

Code:

py_car = [“swift”, “polo”, “BMW”]

print (py_car)

Output:

Sets

Below example shows sets are as follows.

py1 = {11, 21, 31, 41}

py2 = {11, 15}

Code:

py = {11, 12, 13}

print (py)

Output:

Dictionaries

Below example shows dictionaries are as follows.

py1 = {a: a * 5 for range(5)}

Code:

py = {11: ‘red’, 12: ‘black’}

print (py)

Output:

Generator Expressions

The below example shows generator expressions are as follows.

py = (a * 5 for py range(10))

len (py)

for a in py:

Code:

def generator():

py = 15

print (‘Result ‘,py)

yield py

py1 = generator()

next (py1)

Output:

Unpacking Operator

Below example shows unpacking operator are as follows.

p1 = [11, 12, 13]

p2 = [14, 15, 16]

p12 = [*p1, “a”, *p2]

Code:

py = [16,17,18,19,10]

print (py)

Output:

How Python 3 Cheat Sheet is Different from Version 2?

Let us know how it differs from version 2.

Division operator: For a case 7/5 or -7/5, then the output in Python 2 will be 1 and -2, respectively, but in python3 the output will be 1.4 and -1.4.
Unicode: In Python 2 str type is ASCII, but in version 3, it is Unicode.