Learn Python in One Hour (?)

I took it as a challenge to teach someone who has no idea of python to get started in 1 hour

Go to colab.research.google.com and open a new notebook. You’re ready to execute python!

x = 1
y = 2

Just like algebra!
x and y are a variables and they can be changed anytime

Now you can -

print(x+y)
print(x-y)
print(x*y)
print(x/y)

Just like math! +, -, * and / are what you think they are, addition, subtraction, multiplication and division

Let’s learning about printing

• You want to print multiple things? Separate them with a comma

print(x, y)
# this should print a `1 2` in the output

What is the # doing in my code?

All lines that start with a # are called comments
and are used for communicating stuff to the reader

• You want to separate x and y with something other than a space? Use

print(x, y, sep=';')
# this should print a `1;2` in the output

What just happened?

• Well, print is a function.
• All functions take two kinds of inputs: arguments and keyword-arguments
  • arguments → Those that are directly fed to the function. Order usually matters
    E.g., func(y,x,z,a,b,c)
x, y, z, a, b and c are called arguments to the function
  • keyword arguments → Those that are of the form
    func(..., key1=value1, key2=value2, ...)
  • all arguments and keyword arguments are separated by a comma in python

• You want to print “x=1 and y=2”? Just wrap your variables with the text you want.

print(f'{x=} and {y=}')
# should print `x=1 and y=2`

• You don’t want to print x= and y= and need more control? Just remove the equal to symbol

print(f'ex is equal to {x} and why = {y}')
# ex is equal to 1 and why = 2