Python Cheat Sheet AimPor

A Programming › Python cheat sheet in English by chaaimch

3,086 views 1,319 downloads 12 Feb 2016 History

PRs

3.7 avg · 0 ratings

Vocabulary

Variable	hold a value and can be change
String	a list of character such as number, letter and symbols
Integer Number	whole number/ counting number
float number	the number in decimal
syntax	grammar/ structure of language
modulo	find the remainder
boolean	true/ flase

Addition

string + string	combine together
string + number	CRASH!
number + number	Addition (math)

Multiplication and exponents

string* number	combine that string
string* string	CRASH!
number* number	Multiply (Math)
string ** string	CRASH!
number ** number	Exponents (Math)
string ** number	CRASH!

if/ elif/ else

def printdefinition (word):

if word == "function":
print("""
function lets you use code
""")

elif word== "string":
print("""
string is list of character
""")
else:
print ("unknown word")
user_word = input ("Enter a word to define: ")
printdefinition(user_word)

for loop

"""
list = [2,3,4,5,6,7]
list_num = 0
while (list_num < len(list)):
print (list[list_num])
list_num = list_num+1
"""
forlist = [1,2,3,4]
for item in forlist:
print (item)

circle

def doubleIt(number):
return number2
print (doubleIt (3))
print (doubleIt (2.5))
print (doubleIt("hi"))

myvar = doubleIt (doubleIt (3))
print (myvar)

def areaOfCircle (radius):
if (radius<=0):
return "Error: radius <=0"
pi = 3.1415
area = pi(radius2)
return area
user_radius = input("Enter the radius: ")
radius = float(user_radius)
print ("The area of the circle is", areaOfCircle(radius))

Function

print()	show information that you want on the screen
int()	change number to be number integer
float()	change number too be decimal number
Input()	gain information from user
str()	a list of number, letter and symbols
len()	the length of the string
#	comment, no effect

function

_varl = 1
_varl = 3
_varl + 100
print(_varl)

def bacon():     #use the keyword def and end with a colon:
    print("hello it's bacon")
    return

bacon()
bacon()
bacon()
bacon()
bacon()

def bacon():
    print("hello it's bacon")
    print("line 2")
    print("line 3")
    print("line 4")
    print("line 5")
    print("line 6")
    print("line 7")
    print("line 8")
    return

bacon()
bacon()
bacon()

def myprint(text): #single parameter
    print ("***" + str(text) + "***")
    return

myprint(1)
myprint("hello")
myprint(1+2)

def myprint2(text, decoration):
    print(decoration + str(text) + decoration)
    return

myprint2(12312321312, "++++")
myprint2("hello", "<<>>")

def doubleIt(number):

    return number * 2

myvar = 2
myvarDouble = doubleIt(myvar)
print(doubleIt("hello"))

myvar = doubleIt(doubleIt(3)) #same as doubleIt(6)
print (myvar)

def sumIt(num1, num2):
    return num1 + num2

print(sumIt("a", "b"))
print(sumIt(2,3))

def areaOfCircle (radius):
    pi = 3.1415
    area = pi * radius**2 
    return area

user_radius = input('Enter the radius: ')
radius = float(user_radius)
print("The area of the circle is", areaOfCircle(radius))

def areaOfCircle(r):
    if r <= 0:
        return "Error: radius <= 0"

    pi = 3.1415
    area = pi * r ** 2
    return area

user_radius = input("Enter the radius: ")
radius = float(user_radius)

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

Math

= =	equal to
!=	no equal to
<	less than
>	more than
<=	less than or equal to
>=	more than or equal to
%	Modulo, find the remainder

list

import random
intlist = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
random_int = random.choice (intlist)
print(intlist,random_int)

fplist = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6]
random_fp = random.choice (fplist)
print (fplist,random_fp)

strlist = ["1","2","3","4","5","6","7","8","9"]
random_str = random.choice (strlist)
print (strlist,random_str)

mylist = ["adam","mild","loveadam","levine","3","4.6",424,674,5.733]
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)

shopping list

shoppinglist = ['salmon', 'bacon', 'water', 'jelly', 'ham']

print (shoppinglist)

list_num = 0

while list_num < len(shoppinglist):
print ("List:",shoppinglist[list_num])
list_num = list_num + 1

for item in shoppinglist:
print (item)

numbers = range(120)

for num in numbers:
print (num)

covert to int

user_word = input ("Please enter a number")
number = int (user_word)
print (number * 10)

random

import random

mylist = ['mild', 'stamp', 'nae', 'mint']
print(mylist[0])
counter = 0
while counter < 10:
random_item = random.choice(mylist)
print (random_item)
counter = counter + 1

Badges

Nice Cheat Sheet Good Cheat Sheet

Comments

No comments yet.