shell commands written by python

Author: Nataliia74

implement-shell-tools/cat/cat.py

@@ -0,0 +1,42 @@
+import argparse
+
+parser = argparse.ArgumentParser(
+    prog = "cat-command",
+    description = "cat shell command in python "
+)
+
+parser.add_argument("-n",  action="store_true", help="Display all lines numbers")
+parser.add_argument("-b",  action="store_true", help="Display numbers non-empty lines")
+parser.add_argument("path", nargs="+", help="The file to search")
+
+args = parser.parse_args()
+
+for file_path in args.path:
+    with open(file_path, "r") as f:
+        content = f.readlines()
+
+    if args.n:
+        number = 1
+        for line in content:
+            print(f"{number}\t{line.strip()}")
+            number +=1
+    elif args.b:
+        number = 1
+        for line in content:
+            if line.strip() !="":
+                print(f"{number}\t{line.strip()}")
+                number +=1
+            else: 
+                print("")
+    else:
+        print("".join(content))
+   
+               
+
+
+# if args.b:
+#     number=1
+#     for line in content:
+#         print
+
+# print(content)

implement-shell-tools/ls/ls.py

@@ -0,0 +1,59 @@
+import argparse
+import os
+import stat
+import pwd
+import grp
+import time
+
+parser = argparse.ArgumentParser(
+    prog = "ls-command",
+    description= "ls shell command on python"
+)
+
+parser.add_argument("-l", action="store_true", help="Display long format description files")
+parser.add_argument("-a", action="store_true", help="Display hidden files along with visible")
+parser.add_argument("path", nargs="*", default=["."], help="The file to search")
+
+args=parser.parse_args()
+
+def long_format(path, file):
+    info = os.stat(path)
+    permissions = stat.filemode(info.st_mode)
+    size_file = info.st_size
+    owner = pwd.getpwuid(info.st_uid).pw_name
+    group = grp.getgrgid(info.st_gid).gr_name
+    mtime = time.strftime("%b %d %H:%M", time.localtime(info.st_mtime))
+    print (permissions, size_file, owner, group, mtime, file)
+
+
+
+for path in args.path:
+    if os.path.isfile(path):
+        file = os.path.basename(path)
+        if args.l:
+            long_format(path, file)
+        else:
+            print(file)
+    elif os.path.isdir(path):
+        files = os.listdir(path)
+
+        if not args.a:
+            visible_files=[]
+            for file in files:
+                if not file.startswith("."):
+                    visible_files.append(file)
+            files=visible_files
+                    
+        for file in files:
+            full_file_path = os.path.join(path, file)
+
+            if args.l:
+                long_format(full_file_path, file)
+            else:
+                print(file)
+
+
+
+
+
+

implement-shell-tools/wc/wc.py

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+import argparse
+
+parser = argparse.ArgumentParser(
+    prog = "wc-count words, lines, characters",
+    description = "wc shell command on python"
+)
+
+parser.add_argument("-l", action="store_true", help="Count lines")
+parser.add_argument("-w", action="store_true", help="Count words")
+parser.add_argument("-c", action="store_true", help="Counts bytes")
+parser.add_argument("path", nargs="+", help="The file to search")
+
+args = parser.parse_args()
+
+for file_path in args.path:
+    with open(file_path, "r") as f:
+        content = f.readlines()
+
+    text = "".join(content)
+    count_lines = len(content)
+    count_words = len(text.split())
+    count_bytes=len(text.encode("utf-8")) 
+
+    if not (args.l or args.w or args.c):
+        print (count_lines, count_words, count_bytes, file_path)
+    if args.l:
+        print (count_lines, file_path)
+    if args.w:  
+        print (count_words, file_path)
+    if args.c:   
+        print (count_bytes, file_path)
+           
+
+
+
+
+
+