给定此示例函数:
def writeFile(listLine,fileName):
'''put a list of str-line into a file named fileName'''
with open(fileName,'a',encoding = 'utf-8') as f:
for line in listLine:
f.writelines(line+'\r\n')
return True
这return True
条语句有用吗?
有它和没有它有什么区别?如果没有返回函数会发生什么?