增加了main函数

Day01-15/code/Day11/csv1.py

@@ -8,14 +8,20 @@ Date: 2018-03-13
 
 import csv
 
-filename = 'example.csv'
+def main():
 
-try:
+    # filename = 'example.csv' # 无法打开文件!: example.csv
+    filename = 'teacher.csv'
+
+    try:
         with open(filename) as f:
             reader = csv.reader(f)
             data = list(reader)
-except FileNotFoundError:
-    print('无法打开文件:', filename)
-else:
+    except FileNotFoundError:
+        print('无法打开文件!:',filename)
+    else:
         for item in data:
-        print('%-30s%-20s%-10s' % (item[0], item[1], item[2]))
+            print('%-30s%-20s%-10s' % (item[0],item[1],item[2]))
+
+if __name__ == '__main__':
+    main()