Python programming for
beginners.
Iphone or iPad you need to install a couple of other things first so you go to
the App Store and search for Pycharm. Then in the App Store click on the
install button. Now. Once Pycharm 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 thing 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 those 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 values 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
beginners.
Iphone or iPad you need to install a couple of other things first so you go to
the App Store and search for Pycharm. Then in the App Store click on the
install button. Now. Once Pycharm 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 thing 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 those 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 values 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
