Python for Beginners - Learn Python in 1 Hour Programming with Mosh
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 clickin...
Python for Beginners - Learn Python in 1 Hour
Programming with Mosh
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 gr
een plus sign here in your project explorer window and type in Python. This is the name of your project. N
ow let’s choose a location for your project so we’re going to choose a folder on our computer called projec
ts and then click on the create Button Now let’s change some settings inside of Pycharm. So first thing yo
u ’re going to. To want to do is change the language of your project to Python, So inside of pycharm. Go t
o 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 s
elect the folder where you want your project files to live so now Your project is set up and ready to go all ri
ght let’s start writing some code. We’re going to start with the simplest code possible and that’s a hello wo
rld 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 h
ere in your editor window and call it Hello.py now let’s run our program by clicking on this green run butto
n here inside of pycharm and you’ll see that our program has printed out [UNK] world!" all right that’s our fi
rst simple code block in Python now Let’s take a look at some more code blocks in Python. First thing we’l
l want to do is create a variable, so let’s open up our hello.py file again and enter this code def [UNK] [UN
K] 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. S
o 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 an
d 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 wou
ld 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 ite
m 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 parenthes
es and it would assign the item inside those parentheses to the variable called item. So in this case, the c
ode would print out apple Banana cherry pineapple, so you can see how this works if you wanted to chan
ge 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 alr
ight. Now last but not least let’s talk about functions. Functions are blocks of code that you can use in you
r python programs to simplify your code or to make it more powerful. You can think of functions as mini-pr
ograms inside your python program, So you can see here is a function called square which is just a simpl
e function that takes one parameter which is called a number, and it returns the square of that number. O
kay 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 v
ariables in python.
You run the program and you get this message. The age of John Smith is 1990 okay. So this is how we c
an use the input function in Python to read a value from the user now. In addition to reading values from t
he user, we also have the ability to write values to the user. So let me show you how we do that so we firs
t create a variable called message and set it to the string ’please enter your message’ now we use the pri
nt function to print our message on the terminal window so you can see it here now. Let’s run our program
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