Added File Handling - Exercise

Author: MitkoVtori

Advanced/5.File Handling/File Handling - Exercise/01. Even Lines/01. Even Lines.py

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+def read_text():
+
+    try:
+
+        file = open("text.txt", "r")
+        lines = [line for line in file] # Getting every line on different index
+        file.close()
+        return lines
+
+    except FileNotFoundError:
+        raise FileNotFoundError("File not found")
+
+
+def get_even_lines(text):
+    even_lines = []
+    for line in range(len(text)):
+        if line % 2 == 0:
+            even_lines.append(text[line]) # getting only the lines at even indexes
+    return even_lines
+
+
+def change_symbol(text):
+    change_symbols = {"-", ",", ".", "!", "?"} # symbols that must be changed to @
+
+    for line in range(len(text)):
+        for char in range(len(text[line])):
+            if text[line][char] in change_symbols:
+                text[line] = text[line][0:char] + '@' + text[line][char+1:]
+
+
+def print_result(text):
+    for line in text:
+        sentence = line.split()[::-1] # reversing the result, without reversing the words.
+        # Example:
+        # >>> line = 'some text'
+        # >>> line[::-1] -> 'txet emos'
+        # >>> line.split()[::-1] -> ['text', 'some']
+        # >>> ' '.join(line) -> 'text some'
+        print(' '.join(sentence))
+
+
+text = read_text()
+even_lines = get_even_lines(text)
+
+if __name__ == '__main__':
+    change_symbol(even_lines)
+    print_result(even_lines)

Advanced/5.File Handling/File Handling - Exercise/01. Even Lines/text.txt

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+-I was quick to judge him, but it wasn't his fault.
+-Is this some kind of joke?! Is it?
+-Quick, hide here. It is safer.

Advanced/5.File Handling/File Handling - Exercise/02. Line Numbers/02. Line Numbers.py

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+def read_text():
+
+    try:
+
+        file = open("text.txt", "r")
+        lines = [line for line in file] # getting every line from the text
+        file.close()
+
+    except FileNotFoundError:
+        raise FileNotFoundError("File not found")
+
+    for line in range(len(lines)):
+
+        letters = 0
+        punctuation_marks = 0
+
+        for character in range(len(lines[line])):
+
+            char = lines[line][character]
+
+            if 65 <= ord(char) <= 90 or 97 <= ord(char) <= 122: # if char is letter
+                letters += 1
+
+            elif 33 <= ord(char) <= 47 or 58 <= ord(char) <= 64: # if char is punctuation mark
+                punctuation_marks += 1
+
+        if lines[line][-1] == '\n': # if the sentence ends with '\n' which stands for new line.
+            lines[line] = lines[line][:-1] # We remove it, because otherwise it would give us wrong output
+
+        lines[line] = f"Line {line+1}: {lines[line]} ({letters})({punctuation_marks})\n"
+
+    return lines
+
+
+def output_txt(text):
+
+    file = open("output.txt", "w") # create for writing
+    [file.write(line) for line in text] # write the output in
+    file.close() # close for writing
+
+    file = open("output.txt", "r") # open for reading
+    output = ''.join([line for line in file]) # read every line from the text
+    file.close() # close file for reading
+
+    return output
+
+
+text = read_text()
+print(output_txt(text))

Advanced/5.File Handling/File Handling - Exercise/02. Line Numbers/text.txt

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+-I was quick to judge him, but it wasn't his fault.
+-Is this some kind of joke?! Is it?
+-Quick, hide here. It is safer.

Advanced/5.File Handling/File Handling - Exercise/03. File Manipulator/03. File Manipulator.py

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+import os
+import time
+
+
+def create_file(file_name, *args): # *args is in case we receive more than one parameter
+    try:
+        ''' Delete file content '''
+
+        os.remove(file_name) # removing file
+        file = open(file_name, "x") # creating file
+        file.close() # closing file
+        print(f"File {file_name} content was deleted") # comment that will show on the console if the content is deleted
+
+    except FileNotFoundError:
+        ''' Create file '''
+
+        file = open(file_name, "x") # creating file
+        file.close() # closing file
+        print(f"File {file_name} was created") # comment, that will show on the console, if the creation was successful
+
+
+def add_content(file_name, *args_content): # *args_content is in case we receive more than two parameters
+    content = args_content[0]
+
+    if os.path.exists(file_name):
+        print(f"Content added to {file_name}") # comment that will show on the console if the file exists
+
+    else:
+        print(f"Created {file_name} and added content") # comment that will show, if the file does not exist
+
+    file = open(file_name, "a+") # open file if it exists, else it creates the file.
+    file.write(f"{content}\n") # adding the content
+    file.close() # closing file
+
+
+def replace_content(file_name, *content): # *content is in case we receive more than two parameters
+    old_content, new_content, = content[0], content[1]
+
+    try:
+
+        file = open(file_name, "r") # open for reading
+        lines = [line for line in file] # read lines
+        file.close() # close for reading
+
+        for index, line in enumerate(lines):
+            line = line.replace(old_content, new_content) # replace all occurrences
+            lines[index] = line
+
+        os.remove(file_name) # remove file
+        file = open(file_name, "x") # create file (delete content)
+        file.close() # close file
+
+        file = open(file_name, "a+") # open for writing
+        [file.write(line) for line in lines] # rewrite the modified content
+        file.close() # close for writing
+
+        print(f"{file_name}'s content successfully changed") # if everything is successful, this will show on the console
+
+    except FileNotFoundError:
+        print("An error occurred", "# replacing content")
+
+
+def delete_file(file_name, *args): # *args is in case we receive more than one parameter
+    if os.path.exists(file_name):
+        os.remove(file_name)
+        print(f"File {file_name} was removed") # this will show on the console, if the file is removed successfully
+    else:
+        print("An error occurred", "# Cannot delete file that does not exist") # If the file does not exists
+
+
+operations = {
+    "Create": create_file,
+    "Add": add_content,
+    "Replace": replace_content,
+    "Delete": delete_file
+}
+
+command = input()
+while command != "End":
+
+    operation, name_of_file, *more_content = command.split("-")
+
+    operations[operation](name_of_file, *more_content)
+
+    time.sleep(0.1) # using time.sleep, so the output will be ordered, otherwise it somehow gets mixed up
+
+    command = input()

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/04. Directory Traversal.py

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+import os
+
+
+def get_files():
+
+    if os.path.exists("directory/report.txt"): # Making sure, on second run, the report won't count itself
+        os.remove("directory/report.txt")
+
+    if os.path.exists("report.txt"): # Making sure, on second run, the report won't count itself
+        os.remove("report.txt")
+
+    path = "directory" # path
+    files = os.listdir(path) # files in path/directory
+
+    return files
+
+
+def sort_files(files):
+
+    # sort files and extensions
+    extensions = set()
+    for file_extension in files:
+        extension = file_extension.split(".")[-1] # extension. Example: html
+        extensions.add(f".{extension}") # extension with dot. Example: .html
+
+    sorted_files = sorted(files) # -> list
+    sorted_extensions = sorted(extensions) # -> list
+
+    # create report.txt
+    file1 = open("report.txt", "a+") # creating report 1
+    file2 = open("directory/report.txt", "a+") # creating report 2
+
+    # combine file with extension
+    for extension in sorted_extensions:
+        file1.write(f"{extension}\n")
+        file2.write(f"{extension}\n")
+
+        for file in sorted_files:
+            if extension in file:
+                file1.write(f"- - - {file}\n")
+                file2.write(f"- - - {file}\n")
+
+    # closing opened files
+    file1.close()
+    file2.close()
+
+    return "The result from the program is saved in report.txt"
+
+
+files = get_files()
+print(sort_files(files))

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/demo.pptx

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>You're in my world now</title>
+    <script src="index.js"></script>
+</head>
+<body>
+    <div class="test">
+        <h1 onclick="ChangeColor();" id="main" style="font-size: 250px; text-align: center">Click Me</h1>
+    </div>
+</body>
+</html>

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/index.html

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+function ChangeColor() {
+ document.getElementById("main").style.color = "purple";
+}

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/index.js

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+log _> pip install ME

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/log.txt

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+"HEllO WORLD!"
+print("Please give me good grade!")
+print("Love <3 :)")

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/my_personal_favorite.py

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+# create a directory with files
+
+2nd. # Make code :)

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/notes.txt

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+print("I'm a Python Program")
+print("It's nice to meet you!")

Advanced/5.File Handling/File Handling - Exercise/04. Directory Traversal/directory/program.py

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+from collections import deque
+from time import sleep
+
+rows, columns = 10, 3
+snake = "Python"
+
+while True:
+
+    index_snake = 0
+
+    for row in range(rows):
+
+        result = deque()
+
+        for col in range(columns):
+
+            if index_snake == len(snake):
+                index_snake = 0
+
+            if row % 2 == 0:
+                result.append(snake[index_snake])
+
+            else:
+                result.appendleft(snake[index_snake])
+
+            index_snake += 1
+
+        print("".join(result))
+        sleep(0.1)