Python脚本运行出现语法错误：IndentationError: unindent does not match any outer indentation level

对着Head_First_Python练习 在第一个else出现错误，原因是 else前面有4个缩进用了点点点点空格，其它的是Tab键

movies = ['The Holy Garil',1975,'Terry Jones & Terry Gillian',91,['Graham Chapman',['Michael Palin','John Cleese','Terry Gillian','Eric Idle','Terry Jones',['H','Y']]]]

for each_item in movies:

if isinstance(each_item,list):

for nested_item in each_item:

if isinstance(nested_item,list):

for last_item in nested_item:

if isinstance(last_item,list):

for depper_item in last_item:

print(depper_item)

else:

print last_item

else:

print nested_item

else:

print each_item