cat with python completed

Author: ZabihollahNamazi

implement-shell-tools/cat/cat.py

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+import argparse
+
+parser = argparse.ArgumentParser(
+    prog="cat shell tool",
+    description="making cat tool with oython"
+)
+
+parser.add_argument(
+    "files",
+    nargs="+",
+    help="file to read"
+)
+
+parser.add_argument(
+    "-n",
+    "--number",
+    action="store_true",
+    help="add number to the lines"
+)
+
+parser.add_argument(
+    "-b",
+    "--number_nonblank",
+    action="store_true",
+    help="does not number the blank lines"
+)
+
+args = parser.parse_args()
+
+number_line = 0
+for file in args.files:
+    with open(file, "r") as f:
+        lines = f.readlines()
+
+    for line in lines:
+        if args.number_nonblank:
+            if line.strip():
+                number_line += 1
+                print(f"{number_line} {line}", end="")
+        elif args.number:
+            number_line += 1
+            print(f"{number_line} {line}", end="")
+        else:
+            print(line)
+    
+
+
+

implement-shell-tools/cat/requirements.txt

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+