diff --git a/implement-shell-tools/cat/.gitignore b/implement-shell-tools/cat/.gitignore
new file mode 100644
index 00000000..0cafc1cd
--- /dev/null
+++ b/implement-shell-tools/cat/.gitignore
@@ -0,0 +1 @@
+.venv/
\ No newline at end of file
diff --git a/implement-shell-tools/cat/cat.py b/implement-shell-tools/cat/cat.py
new file mode 100644
index 00000000..0b93e511
--- /dev/null
+++ b/implement-shell-tools/cat/cat.py
@@ -0,0 +1,27 @@
+import argparse
+import glob
+
+
+parser = argparse.ArgumentParser(description="cat command")
+parser.add_argument("files", nargs="+", help="Files to read")
+parser.add_argument("-n", action="store_true", help="Number all lines")
+parser.add_argument("-b", action="store_true", help="Number non-empty lines")
+args = parser.parse_args()
+
+
+files = []
+for pattern in args.files:
+    files.extend(glob.glob(pattern))
+
+line_number = 1  
+
+for file in files:
+    with open(file, "r") as f:
+        for line in f:
+            line_content = line.rstrip("\n")
+            
+            if (args.b and line_content != "") or args.n:  
+                print(f"{line_number}\t{line_content}")
+                line_number += 1
+            else:  
+                print(line_content)
\ No newline at end of file
diff --git a/implement-shell-tools/ls/ls.py b/implement-shell-tools/ls/ls.py
new file mode 100644
index 00000000..713cde6c
--- /dev/null
+++ b/implement-shell-tools/ls/ls.py
@@ -0,0 +1,20 @@
+import argparse
+import os 
+parser=argparse.ArgumentParser(description="ls command")
+parser.add_argument("-1",dest="one_per_line",action="store_true",help="List one file per line")
+parser.add_argument("-a",dest="all", action="store_true",help="Include hidden files")
+parser.add_argument("path", nargs="?", default=".", help="Directory to list")
+
+args=parser.parse_args()
+files=os.listdir(args.path)
+if not args.all:
+    new_files=[]
+    for f in files:
+        if not f.startswith("."):
+            new_files.append(f)
+    files=new_files    
+if args.one_per_line:
+    for f in files:
+        print(f)
+else:
+    print(" ".join(files))        
\ No newline at end of file
diff --git a/implement-shell-tools/wc/wc.py b/implement-shell-tools/wc/wc.py
new file mode 100644
index 00000000..4834ee7a
--- /dev/null
+++ b/implement-shell-tools/wc/wc.py
@@ -0,0 +1,42 @@
+import argparse
+import os
+
+parser = argparse.ArgumentParser(description="wc command")
+parser.add_argument("file", help="File or directory to read")
+parser.add_argument("-l", dest="lines", action="store_true", help="count the number of lines")
+parser.add_argument("-w", dest="words", action="store_true", help="count the number of words")
+parser.add_argument("-c", dest="chars", action="store_true", help="count the number of characters")
+args = parser.parse_args()
+
+def output(line_count ,word_count ,char_count,filename,args):
+    if not(args.lines or args.words or args.chars):
+        return f"{line_count}\t{word_count}\t{char_count}\t{filename}"
+    output=[]
+    if args.lines:
+        output.append(str(line_count))
+    if args.words:
+        output.append(str(word_count))    
+    if args.chars:
+        output.append(str(char_count))
+    output.append(filename)  
+    return "\t".join(output)    
+
+def count_file(path):
+    with open(path) as f:
+        text = f.read()
+    return (
+        len(text.splitlines()),
+        len(text.split()),
+        len(text),
+    )
+
+if os.path.isdir(args.file):
+    files = os.listdir(args.file)
+    for f in files:
+        path = os.path.join(args.file, f)
+        if os.path.isfile(path):
+            line_count, word_count, char_count = count_file(path)
+            print(output(line_count, word_count, char_count, path, args))
+else:
+    line_count, word_count, char_count = count_file(args.file)
+    print(output(line_count, word_count, char_count, args.file, args))
\ No newline at end of file