.gitmodules

@@ -1,3 +0,0 @@
-[submodule "pcc_2e"]
-	path = pcc_2e
-	url = git@github.com:ehmatthes/pcc_2e.git

chap10_file_exceptions.md

@@ -1,121 +0,0 @@
-# Chapter 10. Files and Exceptions
-
-Files operation skipped here. Directly head to Exception
-
-## Exceptions
-
-* **exceptions** = objects python use to manage errors that arise during a program's execution. 
-* When python unsure what to do, exception object is created.
-  * If exceptions are handled correctly, program can continue run
-  * If don't handle exception, program will halt and show *traceback*
-
-Syntax of exception handling: `try-except`
-
-* `try` tells python do sth
-* `except` tell python what to do if an exception is raised.
-
-### e.g. ZeroDivisionError Exception
-
-* Simple error, python will create `ZeroDivisionError` in response to do "Divide by Zero".
-* When you think an error may occur, you can write a `try-except` block to handle exception
-
-```python
-try:
-    print(5/0)
-except ZeroDivisionError:
-    print("You can't divide by zero!")
-```
-
-If more code followed `try-except` block, the program would continue running. e.g. as shown below
-
-### Using Exceptions to Prevent Crashes
-
-Handling errors correctly is important when the program has more work to do after the error occurs.
-
-```python
-print("Give me two numbers, and I'll divide them.")
-print("Enter 'q' to quit.")
-
-while True:
-    first_number = input("\nFirst number: ")
-    if first_number == 'q':
-        break
-    second_number = input("Second number: ")
-    if second_number == 'q':
-        break
-    
-    answer = int(first_number) / int(second_number)
-    print(answer)
-```
-
-This function ask for numbers and will calculate division. To properly cover potential failure, use `try-except-else` block
-
-* `try` block: Python attempts to run code
-* `except` block: catch possible error
-* `else` block: if division operation is successful, carry on!
-
-Hence, program can be more robust
-
-```python
-    try:
-        answer = int(first_number) / int(second_number)
-    except ZeroDivisionError:
-        print("You can't divide by 0!")
-    else:
-        print(answer)
-```
-
-### Handling FileNotFoundError Exception
-
-```python
-filename = 'alice.txt'
-
-with open(filename, encoding='utf-8') as f:
-    contents = f.read()
-```
-
-If python cannot find `alice.txt`, it will raise halt, and show traceback
-
-```
-Traceback (most recent call last):
-  File "alice.py", line 6, in <module>
-    with open(filename, encoding='utf-8') as f:
-FileNotFoundError: [Errno 2] No such file or directory: 'alice.txt'
-```
-
-After changing python code to
-
-```python
-filename = 'alice.txt'
-
-try:
-    with open(filename, encoding='utf-8') as f:
-        contents = f.read()
-except FileNotFoundError:
-    print(f"Sorry, the file {filename} does not exist")
-```
-
-Python will show "Sorry, the file alice.txt does not exist"
-
-### Failing Silently
-
-If you want the program to fail silently and carry on, use `pass` to tell Python to do nothing, and skip the try-except-else blocks
-
-```python
-def count_words(filename):
-    """Count the approximate number of words in a file."""
-    try:
-        --snip--
-    except FileNotFoundError:
-        pass
-    else:
-        --snip--
-
-    filenames = ['alice.txt', 'siddhartha.txt', 'moby_dick.txt', 'little_women.txt']
-    for filename in filenames:
-        count_words(filename)
-```
-
-## Storing Data
-
-`json.dump()` & `json.load`

pcc_2e

@@ -1 +0,0 @@
-Subproject commit 078318e4c5a56959586a14dc03e988e9491d4cec

src/alice.py

@@ -1,7 +0,0 @@
-filename = 'alice.txt'
-
-try:
-    with open(filename, encoding='utf-8') as f:
-        contents = f.read()
-except FileNotFoundError:
-    print(f"Sorry, the file {filename} does not exist")

src/divison_calculator.py

@@ -1,17 +0,0 @@
-print("Give me two numbers, and I'll divide them.")
-print("Enter 'q' to quit.")
-
-while True:
-    first_number = input("\nFirst number: ")
-    if first_number == 'q':
-        break
-    second_number = input("Second number: ")
-    if second_number == 'q':
-        break
-    
-    try:
-        answer = int(first_number) / int(second_number)
-    except ZeroDivisionError:
-        print("You can't divide by 0!")
-    else:
-        print(answer)