Sheffield | 25-SDC-Nov | Sheida Shabankari | Sprint 4 |Implement Shell tools in python

.gitignore

@@ -1 +1,3 @@
 node_modules
+/.venv
+implement-cowsay/.venv/

implement-shell-tools/cat/cat.py

@@ -0,0 +1,23 @@
+import argparse
+
+parser=argparse.ArgumentParser(prog="cat",
+                               usage="implement a simple cat")
+parser.add_argument("-n",action="store_true",help="number the output lines")
+parser.add_argument("-b",action="store_true",help="number the output lines without blank ones")
+parser.add_argument("path",nargs="*",help="files to read")
+args=parser.parse_args()
+# print(args)
+line_number=1
+for per_file in args.path :
+    with open(per_file,"r") as f:
+        if args.n or args.b :
+            lines=f.readlines()
+            for line in lines :
+                if line=="\n" and args.b :
+                    print(line,end="")
+                else :   
+                    print(line_number,line,end="")
+                    line_number=line_number+1
+        else :
+            print(f.read(),end="")
+

implement-shell-tools/ls/ls.py

@@ -0,0 +1,21 @@
+import os
+import argparse
+
+parser=argparse.ArgumentParser(prog="cat",usage="implement a simple ls python")
+parser.add_argument("-1",dest="one",action="store_true")
+parser.add_argument("-a",action="store_true")
+parser.add_argument("path",nargs="*",help="path to list files")
+args=parser.parse_args()
+
+paths=args.path
+if len(paths)==0 : paths=["."]
+
+for path in paths :
+    files_list=os.listdir(path)
+    files_list.sort(key=str.lower)
+for item in files_list :
+  if args.one and args.a :
+     print(item)
+  elif args.one :
+      if not item.startswith(".") : 
+        print(item)

implement-shell-tools/wc/wc.py

@@ -0,0 +1,42 @@
+import argparse
+import os
+
+parser=argparse.ArgumentParser(prog="wc",usage="implement a simple wc in python")
+parser.add_argument("-l",action="store_true",help="count of lines")
+parser.add_argument("-w",action="store_true",help="count of words")
+parser.add_argument("-c",action="store_true",help="count of bytes")
+parser.add_argument("path",nargs="+")
+args=parser.parse_args()
+
+
+paths=args.path
+words_count=0
+total_lines=0
+total_words=0
+total_bytes=0
+
+for file in paths :
+    with open(file,"r") as f :
+        bytes_count=os.path.getsize(file)
+        lines=f.readlines()
+        lines_count=len(lines)
+        for line in lines :
+            words_count+=len(line.split())
+        total_lines +=lines_count
+        total_bytes += bytes_count
+        total_words +=words_count   
+        if not (args.l or args.w or args.c):
+            args.l = True
+            args.w = True
+            args.c = True 
+        print((f"{lines_count:<5}" if args.l else "")+
+              (f"{words_count:<5}" if args.w else "")+
+              (f"{bytes_count:<5}" if args.c else "")+
+              f"{file:<20}")
+        words_count=0
+
+if len(paths)>1 :        
+    print((f"{total_lines:<5}" if args.l else "")+
+        (f"{total_words:<5}" if args.w else "")+
+        (f"{total_bytes:<5}" if args.c else "")+
+        "total")