Ejercicio 5

exercises/ex05/ex05.py

@@ -0,0 +1,34 @@
+# Exercise 2
+# 1. cat command
+
+import argparse
+from pathlib import Path
+
+parser = argparse.ArgumentParser()
+parser.add_argument('paths', nargs="+", type=Path)
+parser.add_argument('-b', '--number-nonblank', default=False, action="store_true")
+parser.add_argument('-n', '--number', default=False, action="store_true")
+args = parser.parse_args()
+count = 1
+rest = 0
+out = []
+
+for path in args.paths:
+    if path.is_file():
+        for line in open(path, 'r').readlines():
+            blank = len(line.strip()) == 0 and args.number_nonblank
+            if blank:
+                out.append({"ln": 0, "txt": ''})
+            else:
+                out.append({"ln": count, "txt": line.rstrip()})
+                count += 1
+
+for el in out:
+    line = ''
+    blank = len(el["txt"].strip()) == 0 and args.number_nonblank
+    if args.number and not blank:
+        total_width = len(str(out[-1]["ln"] - rest))
+        curr_width = len(str(el["ln"] - rest))
+        extra = " " * (total_width - curr_width)
+        line = f"    {extra}{el['ln']}  "
+    print(f"{line}{el['txt']}")