diff --git a/Mittwoch/User_modify.py b/Mittwoch/User_modify.py
new file mode 100644
index 0000000..bc0c231
--- /dev/null
+++ b/Mittwoch/User_modify.py
@@ -0,0 +1,75 @@
+#! /usr/bin/env python3
+from pprint import pprint
+
+from argv import argv_value
+
+
+def read_file(path: str) -> "List of lines":
+    #f = open(path, 'r')
+    with open(path, 'r') as f: 
+    # f.read(buflen) - binary read
+    # f.readline() - 1 Textzeile lesen -> str
+    # f.readlines - alle Textzeilen lesen ->str
+    # f ist gleichzeitig Iterator
+    # 1 möglichkeit
+    #lines = list(map(lambda s : s.rstrip(), f))
+    # 2 möflichkeit
+        lines = list(map(str.rstrip, f))
+    # 3 möglichkeit
+    #lines = []
+    #for line in f.readlines():
+    #    lines.append(line.rstrip())
+    #f.close()
+    return lines
+
+def parse_passwd_lines(line: str) -> "Dict of passwd details":
+    parts = line.split(':')
+    userdict = {
+        "username" : parts[0],
+        "uid" : int(parts[2]),
+        "gid" : int(parts[3]),
+        "realname" : parts[4].split(',')[0],
+        "gecos" : parts[4],
+        "home" : parts[5],
+        "shell": parts[6]
+    }
+    return userdict
+
+def build_userlist(lines) -> "List of user dicts":
+    result = []
+    for line in lines:
+        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()):
+        #print("{username:{width}} {realname}".format(width=32 **user))
+        print("{:5} {:32} {}".format(
+            user['uid'],
+            user['username'],
+            user['realname'], 
+            user['home'], 
+            user['shell']
+        ))
+            
+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']):
+        print("{uid:5} {username:{width}} {realname}".format(width=userlen, **user))
+
+def main():
+    output_functions = {
+        'pprint': pprint,
+        'username': print_userlist_sorted_by_username,
+        'uid': print_userlist_sorted_by_uid,
+        
+    }
+    #outfunc = output_functions['username']
+    outfunc = output_functions[argv_value('-o', default='uid')]
+    lines = read_file("/etc/passwd")
+    userlist = build_userlist(lines)
+    outfunc(userlist)
+
+
+main()
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diff --git a/Mittwoch/__pycache__/argv.cpython-39.pyc b/Mittwoch/__pycache__/argv.cpython-39.pyc
new file mode 100644
index 0000000..6922601
Binary files /dev/null and b/Mittwoch/__pycache__/argv.cpython-39.pyc differ
diff --git a/Mittwoch/argv.py b/Mittwoch/argv.py
new file mode 100644
index 0000000..1faa0c0
--- /dev/null
+++ b/Mittwoch/argv.py
@@ -0,0 +1,12 @@
+#! /usr/bin/env python3
+import sys
+
+def argv_value(param, default=None):
+    idx = 1 
+    while idx < len(sys.argv):
+        if sys.argv[idx] == param:
+            if idx+1 < len(sys.argv) and not sys.argv[idx+1].startswith('-'):
+                return sys.argv[idx+1]
+        idx += 1
+
+    return default
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diff --git a/Mittwoch/command.py b/Mittwoch/command.py
new file mode 100644
index 0000000..ae7f5ba
--- /dev/null
+++ b/Mittwoch/command.py
@@ -0,0 +1,18 @@
+#! /usr/bin/env python3
+import sys
+
+def argv_value(param, default=None):
+    idx = 1 
+    while idx < len(sys.argv):
+        if sys.argv[idx] == param:
+            if idx+1 < len(sys.argv) and not sys.argv[idx+1].startswith('-'):
+                return sys.argv[idx+1]
+        idx += 1
+
+    return default
+
+print("Aktuelles Program : ", sys.argv[0:])
+print("Kommandozeile : ", sys.argv[1:])
+print("Kommandozeile : ", sys.argv[1:])
+
+print("Kommandozeile : ", argv_value('-o'))
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diff --git a/Mittwoch/import.py b/Mittwoch/import.py
new file mode 100644
index 0000000..d3a4b83
--- /dev/null
+++ b/Mittwoch/import.py
@@ -0,0 +1,8 @@
+#! /usr/bin/env python3
+from pprint import pprint
+import sys as pysys
+
+data = dict(userlist = ["nutzer01", "nutzer02", "nutzer03", "nutzer04"],
+            loccation = ["Linuxhotel"]
+    )
+pprint(data)
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diff --git a/Readme.md b/Readme.md
index af9cff6..4238ea0 100644
--- a/Readme.md
+++ b/Readme.md
@@ -17,4 +17,19 @@ rstrip schneidet \n ab
 
 schneidet hinten was ab bei einem String
 
-list 
\ No newline at end of file
+Lambda meistens mit List verwenden wenn ich eine Liste übergebe. 
+
+dir und help geben dir Hilfestellung
+
+dir("abc")
+help("abc".isupper)
+
+Stringformat : 
+
+{}, {1}, {name}  -> nächste Index
+{1:13} -> 13 Zeichen breit und 1 Hoch
+{1 :< 13 }, {1:>13}, {1:^13} verschiebt die Ausgabe
+{0:>..} -> s=string, d=dict, x=Hexa, X=Oktal, b=binar, f=float
+{0:->13} 0x{1:0>4b}".format("abc", 23) -> Beispiel oder "{0:->{width}} 0x{1:0>4b}".format("abc", 23,  width=13)
+
+pydoc3 zeigt die Helps an Beispiel pydoc3 sys
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