Python Learning
This Python tutorial covers everything you need to know to start programming in
Python, from downloading the latest version of Python to learning about variables
and data types. It also provides an exercise for the reader to practice their skills.
Iphone or iPad you need to install a couple of other things first so you go to the
App Store and search for Python. Then in the App Store click on the install button.
Now. Once python is installed, you can open it up by clicking on this icon. Here in
your downloads folder. You should also have a.py file. So let's open that up now.
The first thing you 're going to do is create a new project so let's do that by clicking
on this green plus sign here in your project explorer window and type in Python.
This is the name of your project. Now let's choose a location for your project so
we're going to choose a folder on our computer called projects and then click on
the create Button Now let's change some settings inside of Pycharm. So first th ing
you 're going to. To want to do is change the language of your project to Python,
So inside of pycharm. Go to File > Settings > Project Settings and in the Languages
section change Python to the language of your project. Now next thing you 're
going to want to do is set up your project folder so inside of pycharm go to File >
Settings > Project Structure and in the Project Folder section click on the Browse
button and then select the folder where you want your project files to live so now
Your project is set up and ready to go all right let's start writing some code. We're
going to start with the simplest code possible and that's a hello world program. In
Python. A Hello world program is simply a program that prints out hello world so
let's open up our.py file and enter this code here. Here import sys [UNK] world!") all
right so we've imported the Sys module and then we've printed out [UNK] world!"
now Let's save our file by clicking on this green button here in your editor window
and call it Hello.py now let's run our program by clicking on this green run button
here inside of pycharm and you'll see that our program has printed out [UNK]
world!" all right that's our first simple code block in Python now Let's take a look at
some more code blocks in Python. First thing we'll want to do is create a variable,
so let's open up our hello.py file again and enter this code def [UNK] [UNK] world!")
all right so we've defined a function called say —hello() and inside of say —hello()
we're going to print out [UNK] world!" now let's save our file once again say we
want to declare a variable called price. We would type price and then after we type
the name of the variable. We would put a colon and then the value of that variable.
, So in this case, the value of this variable will be 12.99. So we can use this variable
anywhere inside our Python code now let's say we want to print the value of this
variable. We can do that by simply writing print price and then after that we would
put a period and then the value of the variable. So in this case the code would print
out 12.99 alright. Now let 's say we wanted to change the value of this variable. We
can do that by simply typing new value for price and then after that we would type
a colon and then the new value of the variable. So in this case the code would print
out 13.00 alright. Now let's say we wanted to delete this variable. We can do that
by simply typing delete price and then after that we would type a period and then
hit enter so In this case, the code would delete the variable called price Alright.
Now let's talk about lists. Let's say we have a list of items and we want to display.
each item in turn on our application window so to do that we need to use a for
loop so to declare a for loop. We would type for item in list, and then after that we
would type parenthesis, then the list item and then after that hit enter so In this
case, the code would run for each item in the list called list and then it would go
inside the parentheses and it would assign the item inside t hose parentheses to the
variable called item. So in this case, the code would print out apple Banana cherry
pineapple, so you can see how this works if you wanted to change what was inside
those parentheses. You could do that by simply typing different val ues for
parenthesis. So in this case, I typed apple Banana cherry pineapple. So now you
understand how to use a for loop alright. Now last but not least let's talk about
functions. Functions are blocks of code that you can use in your python programs
to simplify your code or to make it more powerful. You can think of functions as
mini-programs inside your python program, So you can see here is a function
called square which is just a simple function that takes one parameter which is
called a number, and it returns the square of that number. Okay now let's say we
wanted to call this function inside our for loop so to do that we would type
square(12.99) inside our for loop and after that hit enter so. In this case the code
would run and it declare and use variables in python.
You run the program and you get this message. The age of John Smith is 1990
okay. So this is how we can use the input function in Python to read a value from
the user now. In addition to reading values from the user, we also have the abili ty
to write values to the user. So let me show you how we do that so we first create a
variable called message and set it to the string 'please enter your message' now we
use the print function to print our message on the terminal window so you can see
it here now. Let's run our program and see what happens so please enter your
message so we get this message now. What we want to do is display this message
for as long as the user remains in our program. So we use the while loop so we
type while True which means while the condition is True. So In this case the
This Python tutorial covers everything you need to know to start programming in
Python, from downloading the latest version of Python to learning about variables
and data types. It also provides an exercise for the reader to practice their skills.
Iphone or iPad you need to install a couple of other things first so you go to the
App Store and search for Python. Then in the App Store click on the install button.
Now. Once python is installed, you can open it up by clicking on this icon. Here in
your downloads folder. You should also have a.py file. So let's open that up now.
The first thing you 're going to do is create a new project so let's do that by clicking
on this green plus sign here in your project explorer window and type in Python.
This is the name of your project. Now let's choose a location for your project so
we're going to choose a folder on our computer called projects and then click on
the create Button Now let's change some settings inside of Pycharm. So first th ing
you 're going to. To want to do is change the language of your project to Python,
So inside of pycharm. Go to File > Settings > Project Settings and in the Languages
section change Python to the language of your project. Now next thing you 're
going to want to do is set up your project folder so inside of pycharm go to File >
Settings > Project Structure and in the Project Folder section click on the Browse
button and then select the folder where you want your project files to live so now
Your project is set up and ready to go all right let's start writing some code. We're
going to start with the simplest code possible and that's a hello world program. In
Python. A Hello world program is simply a program that prints out hello world so
let's open up our.py file and enter this code here. Here import sys [UNK] world!") all
right so we've imported the Sys module and then we've printed out [UNK] world!"
now Let's save our file by clicking on this green button here in your editor window
and call it Hello.py now let's run our program by clicking on this green run button
here inside of pycharm and you'll see that our program has printed out [UNK]
world!" all right that's our first simple code block in Python now Let's take a look at
some more code blocks in Python. First thing we'll want to do is create a variable,
so let's open up our hello.py file again and enter this code def [UNK] [UNK] world!")
all right so we've defined a function called say —hello() and inside of say —hello()
we're going to print out [UNK] world!" now let's save our file once again say we
want to declare a variable called price. We would type price and then after we type
the name of the variable. We would put a colon and then the value of that variable.
, So in this case, the value of this variable will be 12.99. So we can use this variable
anywhere inside our Python code now let's say we want to print the value of this
variable. We can do that by simply writing print price and then after that we would
put a period and then the value of the variable. So in this case the code would print
out 12.99 alright. Now let 's say we wanted to change the value of this variable. We
can do that by simply typing new value for price and then after that we would type
a colon and then the new value of the variable. So in this case the code would print
out 13.00 alright. Now let's say we wanted to delete this variable. We can do that
by simply typing delete price and then after that we would type a period and then
hit enter so In this case, the code would delete the variable called price Alright.
Now let's talk about lists. Let's say we have a list of items and we want to display.
each item in turn on our application window so to do that we need to use a for
loop so to declare a for loop. We would type for item in list, and then after that we
would type parenthesis, then the list item and then after that hit enter so In this
case, the code would run for each item in the list called list and then it would go
inside the parentheses and it would assign the item inside t hose parentheses to the
variable called item. So in this case, the code would print out apple Banana cherry
pineapple, so you can see how this works if you wanted to change what was inside
those parentheses. You could do that by simply typing different val ues for
parenthesis. So in this case, I typed apple Banana cherry pineapple. So now you
understand how to use a for loop alright. Now last but not least let's talk about
functions. Functions are blocks of code that you can use in your python programs
to simplify your code or to make it more powerful. You can think of functions as
mini-programs inside your python program, So you can see here is a function
called square which is just a simple function that takes one parameter which is
called a number, and it returns the square of that number. Okay now let's say we
wanted to call this function inside our for loop so to do that we would type
square(12.99) inside our for loop and after that hit enter so. In this case the code
would run and it declare and use variables in python.
You run the program and you get this message. The age of John Smith is 1990
okay. So this is how we can use the input function in Python to read a value from
the user now. In addition to reading values from the user, we also have the abili ty
to write values to the user. So let me show you how we do that so we first create a
variable called message and set it to the string 'please enter your message' now we
use the print function to print our message on the terminal window so you can see
it here now. Let's run our program and see what happens so please enter your
message so we get this message now. What we want to do is display this message
for as long as the user remains in our program. So we use the while loop so we
type while True which means while the condition is True. So In this case the
