自动修复python缩进

Question

我的代码没有正确的缩进

if age > 18: 
if salary > 100000: 
print('success') 
elif salary < 50000: 
print('fail') 
else: 
print('get_more_info')
else: 
print('fail')

我需要

if age > 18: 
    if salary > 100000: 
        print('success') 
    elif salary < 50000: 
        print('fail') 
    else: 
        print('get_more_info')
else: 
    print('fail')

我尝试使用

exec(autopep8.fix_code(str))

但是我收到了错误

File "<string>", line 3
print('success') elif salary < 50000: print('fail') else: print('get_more_info') else: print('fail')
                    ^
SyntaxError: invalid syntax

我还尝试使用reindent.py 但它返回

  File "code_file.py", line 1
if age > 18: if salary > 100000: print('success') elif salary < 50000:     print('fail') else: print('get_more_info') else: print('fail')
                                                                                                      ^
SyntaxError: invalid syntax

我该如何解决这个问题并自动完成？