Question

关于python的菜鸟问题，望大神解答

def lines(file):
for line in file: yield line

def blocks(file):
block = []
for line in lines(file):
if line.strip():
block.append(line)
elif block:
yield ''.join(block).strip()
block = []

用这些代码创建文本块，然后调用输出时，为何会丢掉最后一块

Answer 1

你应该是没考虑到最后一行不是空白行的情况，这样最后一行就无法根据判断条件yield了，你可以在后面加一句话测试下，如下：
def lines(file):
for line in file: yield line

def blocks(file):
block = []
for line in lines(file):
if line.strip():
block.append(line)
elif block:
yield ''.join(block).strip()
block = []
print(len(block))