python运行系统路径是有运行程序决定

最近自己写了个flask小程序，具体路径如图

test01.py脚本

import  sys
print("test01系统路径:",sys.path)
from s1pro_flask.views import getname
f=getname.getmainame
f()

getname.py脚本

import  sys
print("getname.sys.path路径是:",sys.path)
from s1pro_flask.views.account import  *
def getmainame():
    print(__name__)

执行test01.py
运行结果

F:python3.6python.exe F:/pyprogram3/s1pro_flask/test01.py
test01系统路径: ['F:\pyprogram3\s1pro_flask', 'F:\pyprogram3', 'F:\python3.6\python36.zip', 'F:\python3.6\DLLs', 'F:\python3.6\lib', 'F:\python3.6', 'F:\python3.6\lib\site-packages']
getname.sys.path路径是: ['F:\pyprogram3\s1pro_flask', 'F:\pyprogram3', 'F:\python3.6\python36.zip', 'F:\python3.6\DLLs', 'F:\python3.6\lib', 'F:\python3.6', 'F:\python3.6\lib\site-packages']
s1pro_flask.views.getname

可以看出来getname模块的sys.path路径和test01.py路径相同
直接运行getname.py脚本结果是：

F:python3.6python.exe F:/pyprogram3/s1pro_flask/s1pro_flask/views/getname.py
getname.sys.path路径是: ['F:\pyprogram3\s1pro_flask\s1pro_flask\views', 'F:\pyprogram3', 'F:\python3.6\python36.zip', 'F:\python3.6\DLLs', 'F:\python3.6\lib', 'F:\python3.6', 'F:\python3.6\lib\site-packages']
Traceback (most recent call last):
  File "F:/pyprogram3/s1pro_flask/s1pro_flask/views/getname.py", line 4, in 
    from s1pro_flask.views.account import  *
ModuleNotFoundError: No module named 's1pro_flask.views'

路径和上面test01程序调用的路径不一致,还报错了识别不了s1pro_flask.views这个模块
对getname.py进行修改

import  sys
print("getname.sys.path路径是:",sys.path)
from account import  *
def getmainame():
    print(__name__)

F:python3.6python.exe F:/pyprogram3/s1pro_flask/s1pro_flask/views/getname.py
getname.sys.path路径是: ['F:\pyprogram3\s1pro_flask\s1pro_flask\views', 'F:\pyprogram3', 'F:\python3.6\python36.zip', 'F:\python3.6\DLLs', 'F:\python3.6\lib', 'F:\python3.6', 'F:\python3.6\lib\site-packages']

Process finished with exit code 0

顺利执行了程序
在修改getname.py脚本

import  sys
print("getname.sys.path路径是:",sys.path)
from .account import  *
def getmainame():
    print(__name__)

运行结果

F:python3.6python.exe F:/pyprogram3/s1pro_flask/s1pro_flask/views/getname.py
getname.sys.path路径是: ['F:\pyprogram3\s1pro_flask\s1pro_flask\views', 'F:\pyprogram3', 'F:\python3.6\python36.zip', 'F:\python3.6\DLLs', 'F:\python3.6\lib', 'F:\python3.6', 'F:\python3.6\lib\site-packages']
Traceback (most recent call last):
  File "F:/pyprogram3/s1pro_flask/s1pro_flask/views/getname.py", line 4, in 
    from .account import  *
ModuleNotFoundError: No module named '__main__.account'; '__main__' is not a package

Process finished with exit code 1

可以看出来如果程序运行的时候__name__==‘main’的时候这个程序默认就是最顶点了，相对路径已经不合适.出现’main’ is not a package …会出现
from …views import account
ValueError: attempted relative import beyond top-level package
但是调用test01.py再次执行可以顺利执行
调用test01.py执行的时候这两种写法都没得问题

import  sys
print("getname.sys.path路径是:",sys.path)
from .account import  *
def getmainame():
    print(__name__)

import  sys
print("getname.sys.path路径是:",sys.path)
from s1pro_flask.views.account import  *
def getmainame():
    print(__name__)

这两种写法均行