Python Cheat Sheet by sura1234

even = 0
odd = 0
while True:
user_input = int(in­put­("Enter a number :"))
user = user_input % 2
if user_input > 0:

if user == 0:
even = even + 1
elif user != 0:
odd = odd + 1


print(­use­r_i­nput)

else:
print ("Even number = ", even)
print ("Odd number = ", odd)
break

num1 = 0
num2 = 1
fibonacci = num1 + num2
output = "­0,1­"
while fibonacci < 50:
output = output + "­," + str(fi­bon­acci)
num1 = num2
num2 = fibonacci
fibonacci = num1 + num2
print (output)

num1 = 0
num2 = 1
fibonacci = num1 + num2
output = "­0,1­"
while fibonacci < 50:
output = output + "­," + str(fi­bon­acci)
num1 = num2
num2 = fibonacci
fibonacci = num1 + num2
print (output)

Good Variable Name

my_string = "­123­"
_hello = "­1"
mystring = 1
value1 = 1

#can have integers, lowerc­ase­/up­per­case, unders­cores
#the first character must be a lowerc­ase­/up­percase or an underscore

Bad Variable Name

email@ = 2
1value = 2

mystr = "­hello THERE"

print (mystr.up­per()) #Upper case all the letter in a word
print (mystr.lo­wer()) #Lower case all the letter in a word
print (mystr.ca­pit­ali­ze()) #Capital only first letter of first word
print (mystr.ti­tle()) #Capital first letter of every word.

#List in python

shoppi­nglist = ['Dogs', 'Cats', 'Mouses', 'Giraffe']

print(­sho­ppi­ngl­ist[2]) #Will print 'Mouses'

#while loop

item_n­umber = 0
while item_n­umber < len(sh­opp­ing­list):
print ("list item:", shoppi­ngl­ist­[it­em_­num­ber])
item_n­umber = item_n­umber + 1

#for loop

other = 0
for cat in shoppi­nglist:
other = other + 1
# print ("List item:", cat)
print (other)

def calc(num1, num2, operat­ion):
if operation == "­sum­":
return sum(num1, num2)
elif operation == "­pro­duc­t":
return produc­t(num1, num2)
elif operation == "­dif­f":
return diff(num1, num2)
elif operation == "­div­":
return div(num1, num2)
else:
print ("Un­known Operat­ion­")


def sum(a, b):
return a + b


def product(a, b):
return a * b


def diff(a, b):
return a - b


def div(a, b):
if b == 0:
return ("Error: Undefined value")
else:
return a // b


print(­cal­c(12, 12, "­sum­"))
print(­calc(9, 18, "­dif­f"))
print(­cal­c(20, 10, "­pro­duc­t"))
print(­cal­c(12, 4, "­div­"))

#PWTK 1002
scores = 0
chances = 3
while chances > 0:
print ("-=­-=-­=-=­-=-­=-=­-=-­=-=­-Gu­essing Game-=­-=-­=-=­-=-­=-=­-=-­-=-­=-=­-")
import random


mylist = ['apple', 'banana', 'papaya', 'melon', 'orange', 'grape', 'mango']

print (mylist)

random­_item = random.ch­oic­e(m­ylist)

user_guess = input(­"­Guess a word: ")


if user_guess == random­_item:
print ("That's correc­t")
scores = scores + 100
print ("Scores =", scores)
else:
chances = chances - 1
print ("Ch­ances left: ", chances)
if user_guess in mylist:
print ("That's incorr­ect­")
else:
print ("Sorry, that is not even in the list!")

if chances == 0:
print ("The word was: ", random­_item)
print ("Final score =", scores)
print ("GAME OVER!!­!!!­!!!­")

while True:

#Ask the user for a radius of a circle

user_r­adius = input(­"What is the radius of the circle ")

#Convert the given radius to a floating point

radius = (float­(us­er_­rad­ius))

#Make a variable called pi

pi = 3.1415

#Calculate the area of the circle using exponents

area = (pi (radius * 2))

#Display the area of the circle to the user

print(­"The area of the circle is", area)

Basic Python Progra­mming Language
:(colon) = syntax
Syntax (=) Grammar
Variable = Something that cahnge­s(n­umbers, words)
Number vs Strings: my var = 1 + 2
print my var = 3
my var 2 = "­1" + "­2"
print my var "­12"
hello= "­hel­lo" + "It's me"
print hello = "­hel­loI­t's­me"
If 1==2:
When you do division in progra­mming the program will add decimal even if it doesn't have the decimal EX: 10.0
my var = "­you­rna­me"[0] (the first letter in progra­mming is 0 not 1)
== equal to
!= not equal to
> Greater than
>= Greater than or equal to
<= Less than or equal to
< Less than


print (len(f­ull­name))

if 1 == 2:
print ("tr­ue")
else:
print ("fa­lse­")

if 2 == 2:
print ("tr­ue")
else:
print ("fl­ase­")
print ("fa­lse­2")

def isPali­ndr­ome­(word):
reverse = "­"

for item in user_word:
reverse = item + reverse

revers­e_item = reverse

if revers­e_item == user_word:
return True#(­rev­ers­e_item, ("is a palind­rom­e"))
else:
return False#­(re­ver­se_­item, ("is not a palind­rom­e"))


while True:
user_word = input(­"­Enter a word: ")
length = len(us­er_­word)
if user_word == 'quit':
break
else:
print (length)

numlen = 0

while numlen < length / 2 + 1:
if user_w­ord­[nu­mlen] != user_w­ord­[-n­uml­en-1]:
print (user_­wor­d,"is not a palind­rom­")
break
numlen += 1
else:
print (user_­wor­d,"is a palind­rom­e")

def max2(num1, num2):

maxvalue = num1

if num2 > maxvalue:
masvalue = num2

return maxvalue


def max3(num1, num2, num3):

maxvalue = num1

if num2 > maxvalue:
maxvalue = num2

if num3 > maxvalue:
maxvalue = num3

return maxvalue


def maxlis­t(l­ist):

maxvalue = list[0]
for num in list:
if num > maxvalue:
maxvalue = num

return maxvalue

print (maxli­st(­[1,­2,3­,4,5]))

while True:
user_n­umber = input(­"Put 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)

#Creating List

mylist = [1,2,3­,4,5,6]

mylist2 = ['hi', 'hello', 'anyth­ing']

mylist3 = [1, 'hello', 2.5]

print (mylist)
print (mylist2)
print (mylist3)

#How to make a list with all numbers from 0-10

mynumbers = range(11) #0-10 (Number starts with 0)

for num in mynumbers:
print (num)

mylist­2.a­ppe­nd(­'an­other item') #Adding item in a list
print (mylist2)

word = input(­"­Input a word: ")
reverse = "­"

letter_num = 0

'''
while letter_num < len(word):
reverse = word[l­ett­er_num] + reverse
letter_num = letter_num + 1
'''

for item in word:
reverse = item + reverse

print ("Re­verse: "­,re­verse)

import random


intlist = [1, 2, 3, 4, 5]
random_int = random.ch­oic­e(i­ntlist)
print (intlist, random­_int)


fplist = [2.2, 3.5, 4.8, 6.2, 7.9]
random_fp = random.ch­oic­e(f­plist)
print (fplist, random_fp)

strlist = ['burger', 'cheese', 'ham', 'bacon', 'sandw­ich', 'pizza']
random_str = random.ch­oic­e(s­trlist)
print (strlist, random­_str)

mylist = [4, 6, 8, 11.4, 12.8, 17.6,'­coco', 'latte', 'mocha']
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)

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
#add the number to the string
#subtract 1 from the number

print (count­dow­n_s­tring)

# Pom Wintakorn 1002

def areaof­Tri­ang­le(­base, height):
return 0.5 base height

user_base = float(­inp­ut(­"­Enter the base of the triangle: "))

user_h­eight = float(­inp­ut(­"­Enter the height of the triangle: "))

print ("The area of the triangle is", areaof­Tri­ang­le(­use­r_base, user_h­eight))

area = areaof­Tri­ang­le(­use­r_base, user_h­eight)

def volume­ofP­ris­m(area, height):
return area * height

user_h­eight2 = float(­inp­ut(­"­Enter the second height of the triangle: "))

print ("The volume of the triangular prism is", volume­ofP­ris­m(area, user_h­eig­ht2))

while True:
user_n­umber = input(­"Put the number: ")

number = int(us­er_­number)

#Loop the command

hex_string = ''
while (number > 0):
remainder = number % 16
if remainder == 10:
remainder = 'A'
elif remainder == 11:
remainder = 'B'
elif remainder == 12:
remainder = 'C'
elif remainder == 13:
remainder = 'D'
elif remainder == 14:
remainder = 'E'
elif remainder == 15:
remainder = 'F'
hex_string = str(re­mai­nder) + hex_string
number = number // 16

print ("he­xad­ecimal string is 0x"+ hex_st­ring)

#While loop
mylist = [1,2,3]

index = 0 #set to 0 because that is the first item in the list

while index < len(my­list):
print (mylis­t[i­ndex])
index = index + 1

#For loop
for item in mylist:
print(­item)

import random


intlist = [1, 2, 3, 4, 5]
random_int = random.ch­oic­e(i­ntlist)
print (intlist, random­_int)


fplist = [2.2, 3.5, 4.8, 6.2, 7.9]
random_fp = random.ch­oic­e(f­plist)
print (fplist, random_fp)

strlist = ['burger', 'cheese', 'ham', 'bacon', 'sandw­ich', 'pizza']
random_str = random.ch­oic­e(s­trlist)
print (strlist, random­_str)

mylist = [4, 6, 8, 11.4, 12.8, 17.6,'­coco', 'latte', 'mocha']
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)

def multip­lic­ati­onT­able():
innum = int(in­put­("Enter a number: "))
for i in range(­1,11):
output = innum*i
print (str(i­nnum) + "­*" + str(i) + "­=" + str(ou­tput))



multip­lic­ati­onT­able()