htsql - 如何使用HTSQL的python库输出json

Question

从示例中:

>>> from htsql import HTSQL
>>> htsql = HTSQL("pgsql:///htsql_demo")
>>> rows = htsql.produce("/school{name, count(department)}")

如何将行转换为 JSON？使用 JSON 格式化程序会崩溃:

>>> rows = htsql.produce("/school{name, count(department)}/:json")
UnsupportedActionError: unsupported action
While processing:
    /school{name, count(department)}/:json
                                      ^^^^

我使用的是 HTSQL 2.3.3

Answer 1

必须通过内部 API 完成:

from htsql import HTSQL
demo = HTSQL('pgsql:///htsql_demo')
rows = demo.produce('/school{name, count(department)}')

from htsql.core.fmt.emit import emit
with demo:
    text = ''.join(emit('x-htsql/json', rows))

print text

这要归功于来自 HTSQL 用户组的 Kirill Simonov。