python import 问题"ModuleNotFoundError: No module named "_failed to import python module [modulenotfounderro

今天用到嵌套import的时候发现一个问题。请看下面：

看上面的test1的包，下面是各个源文件的内容：

#a.py
def p():
    print("12345")
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#b.py
import a
#from . import a
def bi():
    a.p()
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#c.py
from .src import b
def yi():
    print("wo")
    b.bi()
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#d.py
# import sys
# sys.path.append('./py/src')
import py.c
if __name__ == '__main__':
    py.c.yi()
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这里运行d.py就会报错：

/home/andy/anaconda3/bin/python /home/andy/work/mypython/test/test1/d.py
Traceback (most recent call last):
  File "/home/andy/work/mypython/test/test1/d.py", line 3, in <module>
    import py.c
  File "/home/andy/work/mypython/test/test1/py/c.py", line 2, in <module>
    from .src import b
  File "/home/andy/work/mypython/test/test1/py/src/b.py", line 2
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