added

Mittwoch/User_modify.py

@@ -1,6 +1,7 @@
 #! /usr/bin/env python3
 from pprint import pprint
-
+import sys
+import utilities
 from argv import argv_value
 
 
@@ -41,6 +42,7 @@ def build_userlist(lines) -> "List of user dicts":
         result.append(parse_passwd_lines(line))
     return result
 
+
 def print_userlist_sorted_by_username(userlist):
     #ruft für jedes Element key(elem) also e im Lambda-Ausdruck ist ein Element der Liste user dict
     for user in sorted(userlist, key=lambda e: e['username'].lower()):
@@ -52,7 +54,31 @@ def print_userlist_sorted_by_username(userlist):
             user['home'], 
             user['shell']
         ))
-            
+def print_to_file(userlist):
+    userlen = max(map(lambda u: len(u['username']), userlist))
+    try:
+        with open('/etc/userlist.txt', 'w') as outfile:
+            for user in userlist:
+                print("{uid:5} {username:{width}} {realname}".format(
+                width=userlen, **user), 
+                file=outfile)
+    except ImportError:
+        pass
+#  Wird vom Mdule utilities gesteuert
+#    except OSError as e:
+#        print("Kann Datei nicht schreiben", e, file=sys.stderr)
+    else:
+        print("Wird ausgefuehrt wenn keine Execption ausgeloest wird.")
+    finally:
+        print("Wird immer durchlaufen, unabhaengig von ausgeloesten Exceptions")
+
+    
+    #with open('/tmp/userlist.txt', 'w') as outfile:
+    #    for user in userlist:
+    #        print("{uid:5} {username:{width}} {realname}".format(
+    #            width=userlen, **user), 
+    #            file=outfile)
+
 def print_userlist_sorted_by_uid(userlist):
     userlen = max(map(lambda u: len(u['username']), userlist))
     for user in sorted(userlist, key=lambda e: e['uid']):
@@ -61,6 +87,7 @@ def print_userlist_sorted_by_uid(userlist):
 def main():
     output_functions = {
         'pprint': pprint,
+        'logger': print_to_file,
         'username': print_userlist_sorted_by_username,
         'uid': print_userlist_sorted_by_uid,
         
@@ -69,7 +96,8 @@ def main():
     outfunc = output_functions[argv_value('-o', default='uid')]
     lines = read_file("/etc/passwd")
     userlist = build_userlist(lines)
+
     outfunc(userlist)
 
 
-main()
+utilities.hide_exception(main)