set up argparse with -n, -n flags

Author: RaihanSharif

implement-shell-tools/cat/cat.py

@@ -0,0 +1,14 @@
+import argparse
+
+parser = argparse.ArgumentParser(
+    prog="a simple cat implementation",
+    description="cat command line tool with the -n and -b flags"
+)
+
+parser.add_argument("-n", action="store_true", help="number all output lines")
+parser.add_argument("-b", action="store_true", help="number non-empty output lines")
+parser.add_argument("paths", nargs="+", help="file path or paths", )
+
+args = parser.parse_args();
+
+print(args)

implement-shell-tools/wc/requirements.txt

@@ -0,0 +1 @@
+argparse