请问老师，这个报错怎么解决？

Question

import re
import ast

import requests

from csdn_spider.Models import *

def get_nodes_json():
    left_menu_text = requests.get("https://bbs.csdn.net/dynamic_js/left_menu.js?csdn").text
    nodes_str_serch = re.search("forumNodes:(.*])",left_menu_text)         
    if nodes_str_serch:
        nodes_str = nodes_str_serch.group(1).replace("null","None") 
        nodes_list = ast.literal_eval(nodes_str) #将nodes_str转换为list
        return nodes_list
    return []
url_list = []
def process_nodes_list(nodes_list):
    #将json的格式提取出url到list
    for item in nodes_list:
        if "url" in item:
            if item["url"]:
                url_list.append(item["url"])
            if "children" in item:
                process_nodes_list(item["children"])

nodes_list =  get_nodes_json()
process_nodes_list(nodes_list)
print(url_list)
#以下是报错信息
Traceback (most recent call last):
  File "E:/python/项目/csdn_spider/spider.py", line 31, in <module>
    nodes_list =  get_nodes_json()
  File "E:/python/项目/csdn_spider/spider.py", line 18, in get_nodes_json
    nodes_list = ast.literal_eval(nodes_str) #将nodes_str转换为list
  File "E:\Python\lib\ast.py", line 46, in literal_eval
    node_or_string = parse(node_or_string, mode='eval')
  File "E:\Python\lib\ast.py", line 35, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
  File "<unknown>", line 1
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    ^
IndentationError: unexpected indent

Answer 1

bobby 2019-07-13 13:47:53

可以把ast.literal_eval(nodes_str)这行替换为eval(nodes_str)

• 芥子啊 #1

  谢谢老师，解决了

• bobby 回复 芥子啊 #2

  好的，

• 慕容8486466 回复 bobby #3

  老师，我也遇到这个问题了，想问一下老师为什么会报错呀？这么修改的原因是？

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