小编Isa*_*aac的帖子

当我尝试从表中选择一些记录时

    SELECT * FROM movie_test WHERE tags = ('["dramatic","women", "political"]'::json)

sql代码抛出错误

LINE 1: SELECT * FROM movie_test WHERE tags = ('["dramatic","women",...
                                        ^
HINT:  No operator matches the given name and argument type(s). You might      need to add explicit type casts.

********** ?? **********

ERROR: operator does not exist: json = json
SQL ??: 42883
????:No operator matches the given name and argument type(s). You might need to add explicit type casts.
??:37

我错过了什么或者我可以在哪里了解这个错误.

我有很多python包,由我的同事写,我想写一个工具来检查他们依赖的第三个包.

像这样

 #it is my package, need to check,call it example.py
 #We have more than one way to import a package, It is a problem need to consider too

 from third_party_packages import third_party_function

 def my_function(arg):
    return third_party_function(arg)

这个工具应该像这样工作

result = tool(example.py)
#this result should be a dict like this structure
#{"third_party_function":["my_function",]}
#Means "my_function" relies on "third_party_function"

我不知道如何做到这一点,我所能提出的这个工具的实现是将一行Python文件行作为字符串读取,并使用正则表达式进行比较.你能给我一些建议吗？

如果您不知道我的意思,请评论您的问题,我会尽快解决.谢谢!