Python Cheat Sheet

user_number = input("Please enter a number: ")

number = int(user_number)

countdown_string = ""

while number > 0:
    countdown_string = countdown_string + " " + str(number)
    number = number-1 

print (countdown_string)

def hello ():
    print ("Hello it's Pooh")
    return
hello()

Ans : Hello it's Pooh

def myprint(text):
    print ("" + str(text) + "")
    return
myprint(1)

Ans : 1

def mynewprint(text,decor) :
    print(decor + str(text) + decor)
    return
mynewprint(1, "+++")
mynewprint(555, "+++")

Ans : +++1+++
+++555+++

def doubleIt (number) :
    return number * 2

print (doubleIt(5))

myvar = 12
myvar = doubleIt(myvar)
print (myvar)

Ans : 10, 24

def AreaOfCircle(r):
    if r <= 0:
        return "Error: invalid radius"
    pi = 3.1415
    area = (pi*(r**2))
    return area

user_radius =input("Enter your radius: ")
r = float(user_radius)
print ("The area of your circle is", AreaOfCircle(r))

word = input("Type in an word: ")
reverse = ""
for letter in word:
    reverse = letter + reverse
print ("Reverse: ", reverse)

while True:
    user_number = input("Please enter the number: ")

    number = int(user_number)

    binary_string = ''
    while (number > 0):
        remainder = number % 2
        binary_string = str(remainder) + binary_string 
        number = number // 2

    print("Binary string is", binary_string)

user_input = input("Type in your string: ")
reverse = ""
for letter in user_input:
    reverse = letter + reverse
print ("Reverse: ", reverse)
palindrome = reverse
if User_input == palindrome:
    print ("Your input is palindrome")
else:
    print ("Your input is not palindrome")

import random

intlist = [1,2,3,4,5,50000000]
random_list = random.choice(intlist)
print(intlist, random_list)
---------------------------------------
fplist = [1.1,1.2,1.3,1.4,1.5,5.000000]
random_fp = random.choice(fplist)
print(fplist, random_fp)

strlist = ["one","two","three","four","five","ten"]
random_str = random.choice(strlist)
print(strlist, random_str)

mylist = [1, 1.1, "one"]
random_item = random.choice(mylist)
print(mylist, random_item)

myvar1 = 1
myvar2 = 2
myvar3 = 3
varlist = [myvar1, myvar2, myvar3]
random_var = random.choice(varlist)
print(varlist, random_var)