Merge branch 'master' of https://github.com/AstinCHOI/Python-and-Algorithms-and-Data-Structures

Author: AstinCHOI

4장_구조와_모듈/3_grep_word_from_files.py

@@ -10,7 +10,7 @@ def grep_word_from_files():
 
 if __name__ == '__main__':
     if len(sys.argv) < 2:
-        print("Usage: grep_word_from_files.py word infile1 [infile2...]")
+        print(f"Usage: {sys.argv[0]} word infile1 [infile2...]")
         sys.exit()
     else:
         grep_word_from_files()

4장_구조와_모듈/4_remove_blank_lines.py

@@ -1,4 +1,3 @@
-import os
 import sys
 
 def read_data(filename):
@@ -30,7 +29,7 @@ def write_data(lines, filename):
 
 def remove_blank_lines():
     if len(sys.argv) < 2:
-        print ("Usage: noblank.py infile1 [infile2...]")
+        print (f"Usage: {sys.argv[0]} infile1 [infile2...]")
 
     for filename in sys.argv[1:]:
         lines = read_data(filename)

4장_구조와_모듈/5_remove_blank_lines_with.py

@@ -0,0 +1,27 @@
+import sys
+
+def read_data(filename):
+    lines = []
+    with open(filename) as fh:
+        for line in fh:
+            if line.strip():
+                lines.append(line)
+    return lines
+
+def write_data(lines, filename):
+    fh = None
+    with open(filename, "w") as fh:
+        for line in lines:
+            fh.write(line)
+    
+def remove_blank_lines():
+    if len(sys.argv) < 2:
+        print (f"Usage: {sys.argv[0]} infile1 [infile2...]")
+
+    for filename in sys.argv[1:]:
+        lines = read_data(filename)
+        if lines:
+            write_data(lines, filename)          
+            
+if __name__ == '__main__':
+    remove_blank_lines()

4장_구조와_모듈/6_change_ext_file.py

@@ -0,0 +1,19 @@
+import os
+import sys
+import shutil
+
+def change_file_ext():
+    if len(sys.argv) < 2:
+        print(f"Usage: {sys.argv[0]} filename.old_ext 'new_ext'")
+        sys.exit()
+
+    name = os.path.splitext(sys.argv[1])[0] + "." + sys.argv[2] 
+    print(name)
+
+    try:
+        shutil.copyfile(sys.argv[1], name)
+    except OSError as err:
+        print(err)
+
+if __name__ == '__main__':
+    change_file_ext()

4장_구조와_모듈/hello.py

@@ -1,7 +1,10 @@
 hello = "hello"
+
 def world():
     return "world"
+
 if __name__ == '__main__':
     print(f"{__name__} 직접 실행됨.")
 else:
-    print(f"{__name__} 임포트 됨.")
+    print(f"{__name__} 임포트 됨.")
+