修改代码错误

next(iterator[, default])如果没有设置默认值，迭代结束的时候仍然会抛出StopIteration异常
2016-01-09 14:37:19 +08:00
parent 414614f5d0
commit 84719609ea
1 changed files with 1 additions and 1 deletions
--- a/source/c04/p01_manually_consuming_iterator.rst
+++ b/source/c04/p01_manually_consuming_iterator.rst
@@ -32,7 +32,7 @@

    with open('/etc/passwd') as f:
        while True:
-            line = next(f)
+            line = next(f, None)
            if line is None:
                break
            print(line, end='')