add pep content

Author: iulusoy

Material_Part1_PEP/PEP_right_or_wrong

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+# Naming conventions
+
+Which of the below naming conventions are correct?
+
+- [ ] `class my-first-analysis:` 
+- [ ] `class my_first_analysis:` 
+- [ ] `class Myfirstanalysis:` 
+- [ ] `class MyFirstAnalysis:` 

PEP_recommendations/README.md

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+# PEP recommendations
+
+## What is a PEP?
+
+Find out about the purpose of PEPs (Python Enhancement Proposals) on the [pep site](https://peps.python.org/pep-0001/). Short answer: These are documents helping to organize the evolution of the Python language in the community.
+
+You can find a list of PEPs [here](https://peps.python.org/).
+
+## What is PEP 8?
+
+[PEP 8](https://peps.python.org/pep-0008/) is a meta-PEP = a PEP about other PEPs. PEP 8 specifies Python styling do's and dont's.
+
+## PEP 8 summary
+
+1. Line length
+Don't write lines that are very long. Reason: Often you would use multiple windows next to each other and that makes it hard to read code (and possibly lead to introduction of bugs).  
+PEP 8 recommends lines no longer than 79 characters, but 90 is also a good number.
+
+1. Alignment of code  
+Make use of indentation when using continuation lines:  
+
+        foo = long_function_name(var_one, var_two,
+                                 var_three, var_four)  
+                                 
+    instead of 
+
+        foo = long_function_name(var_one, var_two,
+            var_three, var_four)
+
+    You may also use hanging indents
+
+        foo = long_function_name(
+            var_one, var_two,
+            var_three, var_four)
+
+1. Break line before binary operator
+        
+        income = (gross_wages
+          + taxable_interest
+          + (dividends - qualified_dividends)
+          - ira_deduction
+          - student_loan_interest)
+
+    instead of  
+
+        income = (gross_wages +
+          taxable_interest +
+          (dividends - qualified_dividends) -
+          ira_deduction -
+          student_loan_interest)
+
+1. Blank lines:  
+- two blank lines after `import` statements
+- two blank lines between functions and classes
+- one blank line between methods of classes
+
+        import os
+
+
+        def greeting():
+           print("Hello world!")
+
+
+        def goodbye():
+        print("See ya!")
+    
+    instead of
+
+        import os
+
+        def greeting():
+           print("Hello world!")
+
+        def goodbye():
+        print("See ya!")
+
+    and
+
+        def something():
+            pass
+
+
+        class MyClass:
+
+            def my_method():
+                pass
+
+            def some_other():
+                pass
+
+    instead of 
+
+        def something():
+            pass
+
+        class MyClass:
+            def my_method():
+                pass
+            def some_other():
+                pass
+
+
+## What is PEP 257?
+
+[PEP 257](https://peps.python.org/pep-0257/) specifies styling of Python docstrings.
+
+## PEP 257 summary
+
+## PEP 20
+
+The Zen of Python. Type `import this` in your Python console.