diff --git a/.gitignore b/.gitignore
index 3c3629e64..7ef75e11b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 node_modules
+.DS_Store
+.DS_Store
+**/.DS_Store
diff --git a/implement-shell-tools/cat/cat.py b/implement-shell-tools/cat/cat.py
new file mode 100644
index 000000000..686fe8ed0
--- /dev/null
+++ b/implement-shell-tools/cat/cat.py
@@ -0,0 +1,47 @@
+import sys
+from pathlib import Path
+
+def cleanInput(listOfFiles):
+    cleanLinesArr = []
+
+    for file in listOfFiles:
+        grabbedText = Path(file).read_text(encoding="utf-8") 
+        splitLines = grabbedText.splitlines()
+        cleanLinesArr.extend(splitLines) 
+    
+    return cleanLinesArr
+
+def takeSpecifiedAction(cleanLinesArr, flag):
+    countingOnlyFullLines = 1
+
+    if flag not in (None, "-n", "-b"):
+        print("incorrect flag")
+        return
+
+    for line in cleanLinesArr: 
+        if not flag:
+            print(line)
+        elif flag == "-n":
+            print(f"{countingOnlyFullLines} {line}")
+            countingOnlyFullLines += 1
+        elif flag == "-b":
+            if line == "":
+                print("")
+            else:
+                print(f"{countingOnlyFullLines} {line}")
+                countingOnlyFullLines += 1
+
+
+args = sys.argv[1:]  
+flag = None
+restIsFiles = []
+
+if len(args) > 0 and args[0] and args[0][0] == "-":
+    flag = args[0]
+    restIsFiles = args[1:]
+else:
+    flag = None
+    restIsFiles = args
+
+lines = cleanInput(restIsFiles)
+takeSpecifiedAction(lines, flag)
\ 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 000000000..1f85e729f
--- /dev/null
+++ b/implement-shell-tools/ls/ls.py
@@ -0,0 +1,39 @@
+import sys
+import os
+
+#  `ls -1`
+def showAllFilesInDir(directory):
+    listOfFiles = os.listdir(directory)
+
+    for eachFile in listOfFiles:
+        if eachFile[0] != ".":
+            print(eachFile)
+
+# `ls -1 sample-files`
+def showVisibleInSampleFiles(directory):
+    listOfFiles = os.listdir(directory)
+
+    for eachFile in listOfFiles:
+        if eachFile[0] != ".":
+            print(eachFile)
+
+# `ls -1 -a sample-files`
+def showAllInSampleFiles(directory):
+    listOfFiles = os.listdir(directory)
+
+    for eachFile in listOfFiles:
+        print(eachFile)
+
+argv = sys.argv[1:]
+
+show_all = "-a" in argv
+
+directories = [arg for arg in argv if arg != "-a"]
+if not directories:
+    directories = ["."]
+    
+for directory in directories:
+    if show_all:
+        showAllInSampleFiles(directory)
+    else:
+        showVisibleInSampleFiles(directory)
\ 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 000000000..42738869f
--- /dev/null
+++ b/implement-shell-tools/wc/wc.py
@@ -0,0 +1,26 @@
+import sys
+from pathlib import Path
+
+def countAll(listOfFiles, flag=None):
+    for file in listOfFiles:
+        content = Path(file).read_text(encoding="utf-8")
+        if flag == "-l":
+            print(f"{len(content.splitlines())} {file}")
+        elif flag == "-w":
+            print(f"{len(content.split())} {file}")
+        elif flag == "-c":
+            print(f"{len(content)} {file}")
+        else:
+            print(f"{len(content.splitlines())} {len(content.split())} {len(content)} {file}")
+
+argv = sys.argv[1:]
+files = [arg for arg in argv if not arg.startswith("-")]
+
+if "-l" in argv:
+    countAll(files, "-l")
+elif "-w" in argv:
+    countAll(files, "-w")
+elif "-c" in argv:
+    countAll(files, "-c")
+else:
+    countAll(files)
\ No newline at end of file