Sheffield | 25-SDC-Nov | Sheida Shabankari | Sprint 4 |Implement Shell tools in python

.gitignore

@@ -1 +1,3 @@
 node_modules
+/.venv
+implement-cowsay/.venv/

implement-shell-tools/cat/cat.py

@@ -0,0 +1,44 @@
+import argparse
+
+parser = argparse.ArgumentParser(
+    prog="cat",
+    usage="implement a simple cat"
+)
+
+# Flag to number all lines
+parser.add_argument(
+    "-n",
+    action="store_true",
+    help="Number all output lines"
+)
+
+# Flag to number only non-blank lines
+parser.add_argument(
+    "-b",
+    action="store_true",
+    help="Number non-blank output lines"
+)
+
+# Positional argument for files to read
+parser.add_argument(
+    "path",
+    nargs="*",
+    help="Files to read"
+)
+
+args = parser.parse_args()
+# print(args)
+line_number=1
+for per_file in args.path :
+    with open(per_file,"r") as f:
+        if args.n or args.b :
+            lines=f.readlines()
+            for line in lines :
+                if line=="\n" and args.b :
+                    print(line,end="")
+                else :   
+                    print(line_number,line,end="")
+                    line_number=line_number+1
+        else :
+            print(f.read(),end="")
+

implement-shell-tools/ls/ls.py

@@ -0,0 +1,36 @@
+import os
+import argparse
+
+parser=argparse.ArgumentParser(prog="cat",usage="implement a simple ls python")
+parser.add_argument("-1",dest="one",action="store_true")
+parser.add_argument("-a",action="store_true")
+parser.add_argument("path",nargs="*",help="path to list files")
+args=parser.parse_args()
+
+paths=args.path
+if len(paths)==0 : paths=["."]
+
+for path in paths :
+    files_list=os.listdir(path)
+    files_list.sort(key=str.lower)
+
+    # Divide into hidden and non-hidden
+    non_hidden = [f for f in files_list if not f.startswith(".")]
+    hidden = [f for f in files_list if f.startswith(".")]
+
+    # Sort each list
+    non_hidden.sort(key=str.lower)
+    hidden.sort(key=str.lower)
+
+    # Add '.' and '..' at the start if -a
+    if args.a:
+        files_list = ['.', '..'] + non_hidden + hidden
+    else:
+        files_list = non_hidden
+
+for item in files_list :
+  if args.one and args.a :
+     print(item)
+  elif args.one :
+      if not item.startswith(".") : 
+        print(item)

implement-shell-tools/wc/wc.py

@@ -0,0 +1,58 @@
+import argparse
+import os
+
+
+# Set up argument parser for wc command
+parser=argparse.ArgumentParser(prog="wc",usage="implement a simple wc in python")
+parser.add_argument("-l",action="store_true",help="count of lines")
+parser.add_argument("-w",action="store_true",help="count of words")
+parser.add_argument("-c",action="store_true",help="count of bytes")
+parser.add_argument("path",nargs="+")
+args=parser.parse_args()
+
+
+paths=args.path
+words_count=0
+total_lines=0
+total_words=0
+total_bytes=0
+
+# Function to print counts for a file or total
+def print_wc(lines, words, bytes_, name):
+    # Print selected counts in formatted columns
+    print(
+        (f"{lines:<5}" if args.l else "") +
+        (f"{words:<5}" if args.w else "") +
+        (f"{bytes_:<5}" if args.c else "") +
+        f"{name:<20}"
+    )
+
+# Loop through all files
+for file in paths :
+    with open(file,"r") as f :
+        # Get file size in bytes
+        bytes_count=os.path.getsize(file)
+         # Read all lines
+        lines=f.readlines()
+        lines_count=len(lines)
+        for line in lines :
+            # Count words in file
+            words_count+=len(line.split())
+
+        # Update totals
+        total_lines +=lines_count
+        total_bytes += bytes_count
+        total_words +=words_count   
+
+        # If no flags provided, default to showing all counts
+        if not (args.l or args.w or args.c):
+            args.l = True
+            args.w = True
+            args.c = True 
+        # Print counts for this file    
+        print_wc(lines_count, words_count, bytes_count, file)
+
+# If multiple files, print totals at the end
+if len(paths)>1 :        
+   print_wc(total_lines, total_words, total_bytes, "total")      
+