diff --git "a/[WIT][Week3][Git&Python][\354\235\264\354\240\225\354\210\230]-\353\263\200\355\231\230\353\220\250.pdf" "b/[WIT][Week3][Git&Python][\354\235\264\354\240\225\354\210\230]-\353\263\200\355\231\230\353\220\250.pdf"
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diff --git a/lister.py b/lister.py
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+++ b/lister.py
@@ -0,0 +1,43 @@
+import os
+import sys
+import random
+
+full_filename_list=[]  #파일의 디렉토리 경로 문자열들을 저장할 전역 변수
+
+def search(dirname):            #모든 하위 디렉토리 검색 함수
+    try:
+        filenames = os.listdir(dirname)
+        for filename in filenames:
+            full_filename = os.path.join(dirname, filename)
+            full_filename_list.append(full_filename)
+            #print("\t"*num+full_filename)
+            if os.path.isdir(full_filename):
+                search(full_filename)
+    except PermissionError:
+        pass
+
+    return full_filename_list
+
+def list_show(list):       #ist를 한줄씩 출력해주는 함수
+    for element in full_filename_list:
+        print(element)
+
+
+######################
+
+dirname = sys.argv[1]+" "+sys.argv[2]
+full_filename_list = search(dirname)
+
+if len(sys.argv)==3:
+    list_show(full_filename_list)
+elif len(sys.argv)==4:
+    if(sys.argv[3]=="random"):
+        random.shuffle(full_filename_list)
+        list_show(full_filename_list)
+    elif(sys.argv[3][0:7]):
+        print("ignore 옵션")
+
+
+
+
+