Complete cat.py

Author: trngdothuy

implement-shell-tools/cat/cat.py

@@ -0,0 +1,39 @@
+import sys
+import argparse
+
+parser = argparse.ArgumentParser(
+    prog="cat",
+    description="Reading the file and print the content",
+)
+
+parser.add_argument("-n", help="Number all lines")
+parser.add_argument("-b", help="Number only lines with content")
+parser.add_argument("paths", nargs="+", help="The file path to process")
+
+args = parser.parse_args()
+paths = args.paths
+
+for path in paths:
+    try:
+        with open(path, "r") as f:
+            content = f.read()
+        lines = content.split("\n")
+        lines.pop()
+        
+        line_num = 1
+        
+        for i in range(len(lines)):
+            line = lines[i]
+            if args.n:
+                print(f"{line_num} {line}")
+                line_num += 1
+            
+            elif args.b:
+                if line != "":
+                    print(f"{line_num} {line}")
+                    line_num += 1
+            else:
+                print(line)
+
+    except Exception as e:
+        print(f"Error reading {path}: {e}")