'\n' 在使用 ast.parse 解析 python 代码时创建缩进

Question

I'm trying to parse with ast.parse in Python 3.7 ( https://docs.python.org/3/library/ast.html ) the following snippet of code:

from functools import reduce 
reduce(lambda x, y: 10 * x + y, [1, 2, 3, 4, 5])

I use the code below:

py_ast = """from functools import reduce \n reduce(lambda x, y: 10 * x + y, [1, 2, 3, 4, 5])"""

py_ast = ast.parse(py_ast)

And i got this error:

File "", line 2 --> reduce(lambda x, y: 10 * x + y, [1, 2, 3, 4, 5]) IndentationError: unexpected indent

I understand the use of \n is creating an indent, how can I avoid it?

Answer 1

You're using triple quotes so why not leave out the \n altogether and just hit enter, the string will stay formatted how you want it.

This code runs fine for me:

import ast

py_ast = """from functools import reduce
reduce(lambda x, y: 10 * x + y, [1, 2, 3, 4, 5])"""

py_ast = ast.parse(py_ast)

print(py_ast)
>>> <ast.Module object at 0x0000019F2E140FD0>