Jesse25:

I mean the website I can use too run d program

gbolly1151:

#Run math python script and expression with eval()
#Take for instance input = 2+4*5-6 
#instead of writing long algorithm you can solve easily with eval()

Math_expression = input(' type your math expression :')
try: 
    Ans = eval(math_expression)
    print(f'output : {Ans}')
except:
    print('invalid basic math operations')

Input : 2+4*5-6
Output : 24

#Run math python script and expression with eval()
#Take for instance input = 2+4*5-6 
#instead of writing long algorithm you can solve easily with eval()

Math_expression = input(' type your math expression :')
try: 
    Ans = eval(math_expression)
    print(f'output : {Ans}')
except:
    print('invalid basic math operations')

Input : 2+4*5-6
Output : 24

Stephenogar:
is the app here?

Jesse25:

pls which tool can i use too execute a program like python

# how to search for index of multiple chars in a string
s='sleep'

#first index of e 
# hint: the syntax of index method is index( string, start, stop) 
# string - the string to search
# start - where to Begin search,by default search Begin at 0 i.e the beginning of the string
# stop - where search to stop ,by default search stop at the end of the string

f_index = s.index('e') #output = 2

S_index =s.index('e', 3) #output = 3

#using iteration to find more than 2 chars in a string

s=' sleeping eeee '
Start_position=0
for i in range(s.count('e')):
    Start_position = s.index('e' , Start_position)
    print(f' e found at position: {Start_position}')
    Start_position+=1
   

#how to arrange a list in ascending order
sorted([3,6,1,2]) #output [1,2,3,6]

#in decending order
sorted([3,6,1,2],reversed = True) # [6,3,2,1]

#how to output dict variable

Nums = {"one" : 1,"two" =2, "three" : 3 }
for key,value in nums.items():
    print(f'{key} - {value}')

#output
# one - 1
#two - 2
#three - 3

# To accept multiple variable into a function
def num(*arg):
    print(*arg)

num(1,2,3,4)  # output = 1 2 3 4
num(1) #output=1
num('hello','world')   #output=hello world

# To accept multiple keyword variable into a function
def num(**a):
    for i,k in a.items():
        print(k)

 
num(a="heloo",b="5" ) #output hello,5
 

#bad style
X = X + 1  

#good style
X += 1    #can be use for other arithmetic operations 

Ajibel:


I haven't had any experience using heroku in this case but what I know is that since the config var you set from the start are persistent, then you wont need to set a new config var again whenever your app is restarted.

Ajibel:


It depends on your choice. I don't know the best, but I have used several patterns. Here is an idea of what I do with Flask:

if os.environ.get('SECRET_KEY'):
........SECRET_KEY = os.environ.get('SECRET_KEY')
else:
........SECRET_KEY = 'SECRET_KEY_ENV_VAR_NOT_SET'
........print('SECRET KEY ENV VAR NOT SET! SHOULD NOT SEE IN PRODUCTION')

But again I think to have a .env file where you set your private keys and read from it is what I have seen many open source projects do. Since you're using heroku, go through their django setup walkthrough. I believe whatever pattern they make use of there is what you should go with.

a,b,c= 'hey','hello','world'

#old string formating
print(a,b,c)

#new string formatting
print(f'{a} {b} {c}')

#in some cases you may want to assign value to some variable that are nearing #in the same category or having mutual relationship

#old way is

a="hello"
b="world"
c="!!!"

#good programming is
a,b,c='hello', 'world', '!!!'

def greet('hello world):
    return 'hello world'

print('hello world')
 

#old way of file operation
f=open('test.txt','rb')
f.write(b'hello world')
f.close()

#fast way
with open('test.txt','rb') as f:
    f.write(b'hello world')

chidemavian:
There are factually no cheats in Python nor any other language.


What u tried to demonstrate in the first example is known as list comprehension.



Its good practice in programming, as is in other professions, to give the right name to the right concept




Don't misslead the public


Thanks.


If u want to reach me.....click here

https:///23407031009036

Ajibel:
In case 1 it means the default value you set would be used as secret key if you didn't set a SECRET KEY in heroku's env.

In case 2 because there's no default, an error will be thrown if you fail to set the key in the env

#old way of finding square of a number
def old_square (num):
    return num*num

#fastest way 
square = lambda num : num*num

print(old_square (5)) #output is 25
Print(square (5)) #output is 25

#how to print negative numbers
Elements = [ element for element in range (0,-10,-1)]

#old coding practice to populate list object
Elements = []
for element in range (10):
    Elements.append(element)
print(Elements)

#new coding practice to populate list object
Elements = [ element for element in range(10) ]