python获取print的输入内容

因为print是输出到sys.out里面, 所以要替换标准的输出：

#coding: utf-8

class TextArea(object):

    def __init__(self):
        self.buffer = []

    def write(self, *args, **kwargs):
        self.buffer.append(args)

import sys

stdout = sys.stdout
sys.stdout = TextArea()

# print to TextArea
print("testA")
print("testB")
print("testC")

text_area, sys.stdout = sys.stdout, stdout

# print to console
print(text_area.buffer)

输出内容：
[('testA',), ('\n',), ('testB',), ('\n',), ('testC',), ('\n',)]

如果是json数据，可以增加一步处理：

data_get_json_ori = text_area.buffer[0]  # json
data_get_json = json.loads(data_get_json_ori)

data_get= {}
host = ''
for key, value in data_get_json.items():
    data_get[key] = value