Fully implement cat

main.py

@@ -1,16 +1,26 @@
 import os
 import subprocess
+import re
 
 initDirectory = os.path.dirname(os.path.realpath(__file__)) 
 currentDirectory = initDirectory
 version = "0.0.1"
 
+def grabArgument(fullCommand, commandRan):
+    fullCommand.replace(commandRan, "")
+
 while True:
     command = input(currentDirectory + " > ")
     if command == "pwd":
         print(currentDirectory)
-    elif command == "cat *":
+    elif command == ("cat"):
-        print("You ran cat")
+        try:
+            
+            catFile = input("File to catalog: ")
+            catFileOpened = open(catFile)
+            print(catFileOpened.read())
+        except Exception:
+            print("File", catFile, "either doesn't exist or isn't in this directory.")
     elif command == "version":
         print(version)
     else:

main.py!

@@ -0,0 +1,20 @@
+import os
+import subprocess
+
+initDirectory = os.path.dirname(os.path.realpath(__file__)) 
+currentDirectory = initDirectory
+version = "0.0.1"
+
+def grabArgument(fullCommand, commandRan):
+    fullCommand.replace(commandRan, "")
+
+while True:
+    command = input(currentDirectory + " > ")
+    if command == "pwd":
+        print(currentDirectory)
+    elif command == ("cat", *):
+        grabArgument(command, cat )
+    elif command == "version":
+        print(version)
+    else:
+        subprocess.run(command)