2023-11-15

CS1032/practical-2023-11-01/head.py

@@ -0,0 +1,21 @@
+import sys, itertools
+
+def open_arg(_arg0, filename = "-"): # Default of - means stdin
+    if filename == "-":
+        return sys.stdin
+
+    return open(filename, 'r')
+
+def head(file):
+    for line in file.readlines()[:10]:
+        print(line, end = "")
+
+if __name__ == '__main__':
+    try:
+        file = open_arg(*sys.argv)
+        head(file)
+    except FileNotFoundError:
+        print("File not found!", file=sys.stderr)
+        sys.exit(1)
+    except:
+        print("Some other error occured", file=sys.stderr)

CS1032/practical-2023-11-01/tail.py

@@ -0,0 +1,21 @@
+import sys, itertools
+
+def open_arg(_arg0, filename = "-"): # Default of - means stdin
+    if filename == "-":
+        return sys.stdin
+
+    return open(filename, 'r')
+
+def tail(file):
+    for line in file.readlines()[-10:]:
+        print(line, end = "")
+
+if __name__ == '__main__':
+    try:
+        file = open_arg(*sys.argv)
+        tail(file)
+    except FileNotFoundError:
+        print("File not found!", file=sys.stderr)
+        sys.exit(1)
+    except:
+        print("Some other error occured", file=sys.stderr)