Python Cheat Sheet

A Programming › Python cheat sheet in English by PHANG

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Vocabulary

Variable	sth that can change
String	a list of characters
Integer number	Whole number/counting number
Float number	The number in decimal
Syntax	Grammar/Structure of language
Modulo	Find the remainder
Boolean	True/False

Print name

name = "time GIRARD"

print (name.upper()) > TIM GIRARD
print (name.lower()) > time girard
print (name.capitalize()) > Tim girard
print (name.title()) > Tim Girard

Convert

word = str(3) #converts 3 to a string "3"
num = int("3.5") #converts "3.5" to an integer 3
num = float("3") #converts "3" to a float 3.0

Addition

string+string	combines the string together
string+number	crash
number+number	Math(addition)

Muitiply

string*string	crash
string*number	combines he string multiple times
number*number	math(multiply)
string**number	crash

Random code

import ramdom

mylist = ["Dog", "Fish", "Cat", "Bear"]
counter = 0

while counter < 10 :

          random_item = random.choice (mylist)
          print (random_item)
          counter = counter + 1

Functions

print()	displays information on the screen
input()	receives info from the user
float()	converts a value to floating point
str()	converts

Example Code

mylists3 =[1, 'hello' , 2.5]

print (mylists)

print (mylists2)

print (mylists3)

#how to make a list with all numbers from 0-99

mynumbers = range(5)

for num in numbers:

print(num)

Naming Conversation

Rule for giving name
-letter
-numbers
-underscore

Valid name
-_myStr
-my3
-Hello_there

Invalid name
-3my="hi" --cannot start with number
-first name="hi"
-first-name
-first+name

func: largenum

def max2(num1, num2):
    if num1 > num2:
        maxvalue = num1
    elif num2 > num1:
        maxvalue = num2
    return maxvalue

#function call
print(max2(92, 3))
print(max2(4, 5))

def max3(num1, num2, num3):
    maxvalue = num1
    if num2 > maxvalue:
        maxvalue = num1
    elif num3 > maxvalue:
        maxvalue = num3
    return maxvalue

#function call
print(max3(92, 5, 6))
print(max3(8, 9, 7))
print(max3(99, 40, 49))

def maxlist(list):
    maxvalue = list[0]
    for num in list:
        if num > maxvalue:
            maxvalue = num
    return maxvalue

mylist = 3, 5657, 90333, 33333333
print(maxlist(mylist))

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