python import导入三种方式（导入不同文件夹的文件，window和linux的区别）

import导入方式

1、导入python自有的库
import json
2、导入同级目录下的文件，比如在logindev.py导入read_config.py文件

# coding = utf-8
from read_config import ReadConfig
import requests
import json
# 拼接请求参数，获取cookie，作为后续登录使用

3、导入不同级别目录下的文件：
a、windows环境

# coding = utf-8
import datetime
import allure
import pytest
import json
import sys
"""windows执行的时候，直接在系统路径上新增文件夹路径"""
sys.path.append("../common")

"""linux执行的时候，直接按照相对路径引用即可"""
from common import http_request

这段代码在linux下报如下错误：

==================================== ERRORS ====================================
_______________ ERROR collecting test_case/test_member_ticket.py _______________
ImportError while importing test module '/var/jenkins_home/workspace/pytest_allure/test_case/test_member_ticket.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
test_member_ticket.py:8: in <module>
    from common import http_request
E   ImportError: No module named 'common'

b、linux环境

# coding = utf-8
import datetime
import allure
import pytest
import json
import sys
"""windows执行的时候，直接在系统路径上新增文件夹路径"""
#sys.path.append("../common")

"""linux执行的时候，直接按照相对路径引用即可"""
from ..common import http_request

这段代码在windows报如下错误：

========================================================================== ERRORS ==========================================================================
__________________________________________________________ ERROR collecting test_member_ticket.py __________________________________________________________
test_member_ticket.py:8: in <module>
    from ..common import http_request
E   ValueError: attempted relative import beyond top-level package
================================================================= short test summary info ==================================================================
ERROR test_member_ticket.py - ValueError: attempted relative import beyond top-level package
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
===================================================================== 1 error in 0.46s =====================================================================

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