Getting size.

Gettin File and Folder sizes/GettingSizez.py

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+#!/usr/bin/python3
+
+import argparse
+import os
+
+parser = argparse.ArgumentParser(description="Take a directory path or a filename and calculate those sizes in KB")
+# Creating an ArgumentParser object
+
+parser.add_argument("-F", help="Choose file prefix for recursive search in directory")
+parser.add_argument("path", help="File or directory path for calculating size")
+# Adding arguments
+
+group = parser.add_mutually_exclusive_group()
+# Creating MutuallyExclusiveGroup object
+
+group.add_argument("-d", action="store_true", help="Directory name for calculate size in KB")
+group.add_argument("-f", action="store_true", help="File name for calculate file size in KB")
+# Adding mutually exclusive arguments [-d | -f]
+
+args = parser.parse_args()
+# Taking arguments from command line
+
+F_argument = args.F
+d_argument = args.d
+f_argument = args.f
+path = args.path
+# Unpacking arguments to variables
+
+is_dir = os.path.isdir(path)
+# Check if path is a directory not a file
+
+if F_argument and not d_argument and not f_argument:
+    # If user uses [-F] option lonely
+    print('[-F] option cannot be used alone')
+
+elif d_argument and is_dir and not f_argument and not F_argument:
+    # If [-d] used and path is a directory
+
+    def get_size(start_path):
+        total_size = 0
+        for dirpath, dirnames, filenames in os.walk(start_path):
+            for f in filenames:
+                fp = os.path.join(dirpath, f)
+                # skip if it is symbolic link
+                if not os.path.islink(fp):
+                    total_size += os.path.getsize(fp) / 1024
+                    # Calculate files sizes and convert to kb
+
+        return total_size
+
+
+    print(f"Size of files in directory: {get_size(path):.3f} KB")
+
+elif d_argument and not is_dir and not f_argument and not F_argument:
+    # If user uses -d option with a file path not a directory
+    print('Must use a directory path with [ -d ].')
+
+elif f_argument and not is_dir and not d_argument and not F_argument:
+    # Id [-f] option used and a file name was entered
+    file_size = os.path.getsize(path) / 1024
+    # Calculate file size and convert to kb
+    print(f"Size of file {path} is: {file_size:.3f} KB")
+
+elif f_argument and is_dir and not d_argument and not F_argument:
+    # If user uses [-f] option with a directory path not a file path
+    print('Must use [ -f ] with a file name not a directory path')
+
+elif f_argument and F_argument:
+    # If user uses [-F] option with [-F] option
+    print('You can not use [-F] option with [-f] option')
+
+elif F_argument and d_argument and is_dir and not f_argument:
+    # If [-F] for search files with their prefixes in a [-d] directory
+    def get_size(start_path):
+        total_size = 0
+        for dirpath, dirnames, filenames in os.walk(start_path):
+            for f in filenames:
+                if f.endswith(F_argument):
+                    fp = os.path.join(dirpath, f)
+                    # skip if it is symbolic link
+                    if not os.path.islink(fp):
+                        total_size += os.path.getsize(fp) / 1024
+                        # Calculate files sizes and convert to kb
+
+        return total_size
+
+
+    print(f"Size of {F_argument} files in directory: {get_size(path):.3f} KB")
+
+elif F_argument and d_argument and not is_dir and not f_argument:
+    # If user uses [-F] option and [-d] option and a file path except directory path
+    print('Must use [ -d ] option with a directory path')

Gettin File and Folder sizes/README.md

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+# This is a script that getting file and folders sizes
+
+# Its use argparse module to write user-friendly command-line interfaces.
+
+# also use OS module to provides functions for interacting with the operating system.
+
+# How we can use it?
+
+### python3 GettingSizes.py --help