new additions

README.md

@@ -14,6 +14,7 @@ This repo is focused towards people who are learning Python for the first time.
 * [Tuples & Sets](markdown-version/tuples_and_sets.md)
 * [Functions](markdown-version/functions.md)
 * [Lambdas](markdown-version/lambdas.md)
+* [Debugging](markdown-version/debugging.md)
 
 
 Feel Free to fork this repo and contribute if you think I missed something.

markdown-version/debugging.md

@@ -0,0 +1,54 @@
+# Debugging Python Code
+- Try and Else Block
+- Pdb
+- set trace method
+
+## Common Python Errors
+- `SyntaxError`
+- `NameError` This usually occurs when a variable is not defined or it hasn't been assigned yet.
+- `TypeError` This usually occurs when an operation or function is applied to a wrong type.
+- `IndexError` This occurs when we are trying to access an element in a list using invalid index.
+- `ValueError`  This occurs when a built in operation or function receives an arguement that has the right type but an inappropiate value
+- `KeyError` This occurs when a dictionary doesn't have a specific key.
+- `AttributeError` This occurs when a variable doesn't have an attribute. 
+
+## Raising Our own Exceptions
+- We can raise our own error exceptions 
+
+```python
+raise ValueError('invalid Error')
+```
+
+- Lets say we have a simple function and we want it to have our own exception.
+
+```python
+def color(text,color):
+    if type(text) is not str:
+        raise TypeError('Enter a valid String')
+    print(f'This {text} is using {color}.')
+```
+
+## Handling Errors
+- In python we can handle errors using `try` and `except`
+
+```python
+try:
+    x
+except ValueError:
+    print("there's a error")
+```
+
+`Else` and `Finally`.
+`Finally` would run no matter what.
+
+```python
+# a small program
+try:
+    x = int(input("Enter a number"))
+except:
+    print("Enter a valid Number")
+else:
+    print("Thanks for a valid number")
+finally:
+    print("I will run no matter what hehehe")
+```