init commit

Author: Sentdex

15. common errors.py

@@ -0,0 +1,88 @@
+'''
+Hello and welcome to another python 3 basics video.
+
+In this video we'll be discussing some of the basics to
+debugging. In my videos, I get a lot of questions for
+help where people have errors and are not sure what
+the problem is. If they used some extremely simple debugging,
+they'd realize how obvious the answer is.
+
+Most of the time, the problem is a typo, followed closely by
+a misunderstanding of indentation and standards.
+
+so standards how are how organize your code. With python,
+unlike most languages, you define blocks of code like
+functions by indentation. Most python editors will automatically
+indent for you where it is necessary. With this, if you are ever
+coding along and find python automatically indenting you where
+you don't think it should, this should raise a flag for you to
+figure out.
+
+
+(show a basic function... )
+
+There are some more in-depth common-issues that you'll
+find from time to time, you can find more debugging videos
+by searching for debuggin in my channel. For now I will just
+keep these ones basic.
+
+The first error we'll discuss is the NameError: is not defined
+
+'''
+
+'''
+As obvious as this might appear to you, this gets people amazingly
+frequently. Just learn to recognize the "is not defined"
+
+chances are you typoed the definition of the variable or when you
+are referring to it. 
+'''
+variable = 55
+#print(varaible)
+
+
+'''
+Next up, we have indentation issues.
+
+You will see "expected an indented block" as a
+popup when you never enter an indented block for
+something that requires it, like a function.
+'''
+
+'''
+def task1():
+
+
+def task2():
+    print('more tasks')
+
+'''
+
+
+'''
+unexpected indent...
+'''
+
+def task():
+    print ('stuff')
+
+print('more stuff')
+
+    print('stuff')
+
+
+
+'''
+EOL while scanning string literal
+'''
+
+
+def task():
+    print('some people find themselves committing this too
+
+
+    print('ouch...')
+
+
+
+          

16. writing to a file.py

@@ -0,0 +1,29 @@
+'''
+Hello and welcome to another python 3 basics tutorial video.
+
+In this video we're going to cover the basics of writing to a file.
+
+It should be noted that there are two methods for saving data to a file, and
+those are writing and appending. Writing to a file will write that bit
+of data, whatever it is, solely, to the file. This means if there was anything
+there before, it will be gone if you use write.
+
+If you use append, then you will basically add to whatever is previously there.
+
+I will be showing both methods, but write first. 
+'''
+
+
+# so here we have some simple text, but we also threw in a \n to
+# denote a new line, this will start a newline in the file that we write to
+text = 'Sample Text to Save\nNew line!'
+
+# notifies Python that you are opening this file, with the intention to write
+saveFile = open('exampleFile.txt','w')
+# actually writes the information
+saveFile.write(text)
+# It is important to remember to actually close the file, otherwise it will
+# hang for a while and could cause problems in your script
+saveFile.close()
+
+

17. appending to a file.py

@@ -0,0 +1,24 @@
+'''
+Alright, so now we get to appending a file in python. I will just state again
+that writing will clear the file and write to it just the data you specify in
+the write operation. Appending will simply take what was already there, and add
+to it.
+
+That said, when you actually go to add to the file, you will still use
+.write... you only specify that you will be appending instead of writing
+when you open the file and specify your intentions.
+
+'''
+
+
+# so here, generally it can be a good idea to start with a newline, since
+# otherwise it will append data on the same line as the file left off.
+# you might want that, but I'll use a new line.
+# another option used is to first append just a simple newline
+# then append what you want. 
+appendMe = '\nNew bit of information'
+
+appendFile = open('exampleFile.txt','a')
+appendFile.write(appendMe)
+appendFile.close()
+

18. readingFiles.py

@@ -0,0 +1,20 @@
+'''
+So now that you know how to write and append files, we can learn how
+to read from files! 
+'''
+
+# similar syntax as you've seen, 'r' for read. You can just throw a .read() at
+# the end, and you get:
+readMe = open('exampleFile.txt','r').read()
+print(readMe)
+
+
+'''
+Now that is great and useful, but a lot of times people want to read by line.
+There are a few things you can do here, but probably the easiest is to:
+'''
+
+# this will instead read the file into a python list. 
+readMe = open('exampleFile.txt','r').readlines()
+print(readMe)
+

19. classes.py

@@ -0,0 +1,46 @@
+class calculator:
+    
+    def addition(x,y):
+        added = x + y
+        print(added)
+        
+    def subtraction(x,y):
+        sub = x - y
+        print(sub)
+
+    def multiplication(x,y):
+        mult = x * y
+        print(mult)
+
+    def division(x,y):
+        div = x / y
+        print(div)
+
+
+
+
+
+
+'''
+>>> calculator.subtraction(5,8)
+-3
+>>> calculator.multiplication(3,5)
+15
+>>> calculator.division(5,3)
+1.6666666666666667
+>>> calculator.addition(5,2)
+7
+>>> 
+
+'''
+
+    
+        
+        
+        
+    
+    
+
+
+
+

20. user input.py

@@ -0,0 +1,14 @@
+'''
+Sometimes in basic gui, or graphical user interphase, applications,
+some input from a user might be wanted. To do this, we use the
+built-in input functionality with python 3. If you are familiar with Python 2.7,
+the python 3 input function acts like the python 2 raw_input function. 
+'''
+
+
+x = input('test:')
+
+print(x)
+
+
+# simple enough

21. more math.py

@@ -0,0 +1,28 @@
+'''
+Python is a very popular programming language for data processing of many types
+With data processing, a lot of math is used often times. So, besides the basic
+math, we should cover some more in depth operations. Luckily for us, python 3
+has some great built in modules that we can utilize. 
+'''
+
+import statistics
+
+example_list = [5,2,5,6,1,2,6,7,2,6,3,5,5]
+
+x = statistics.mean(example_list)
+print(x)
+
+y = statistics.median(example_list)
+print(y)
+
+z = statistics.mode(example_list)
+print(z)
+
+a = statistics.stdev(example_list)
+print(a)
+
+b = statistics.variance(example_list)
+print(b)
+
+
+