Python: Can't import a function from another.py file

user_7871446 0
Viewed 40840

I have a file named handshake.py. Where there is a function send_data(argument). I want to import that function into another file named siptest.py. I am encountering two problems. I am using microsoft visual studio with windows 7, 64-bit. 1) I can't import function. I have tried using,

from handshake import*
handshkae.send_data(argument)

Which give me an error.

NameError: global name 'handshake' is not defined

Another option I have tried is using

import handshake
handshake.send_data(argument)

Which gives me an attribute error.

AttributeError: 'module' object has no attribute 'send_data'

If I use it the other way, such as

from handshake import send_data

2) MS Visual studio says. No test discovered, please check the configuration settings but I still can run the test somehow. and it says that the test is failed because of Import Error.

ImportError: cannot import name send_data

Both of the said files are in same directory. Plus the function is defined in a class 'TCPhandshake' in handshake.py

nameerror scapy importerror python-2.7 visual-studio
8 Answers

One possible reason: there exists reference cycle between module a.py and b.py:

In a.py: import b
In b.py: import a

The solution is to break the cycle. You need to make it clear which module should do what and reduce the dependence.

user_92127940

make sure the function is in the path

import sys
sys.path.insert(0, '/directory/tothe/handshakefile/')

and then 

import handshake
user_7028460

I find a way to import files in the same directory by implementing keyword as and a object variable for example

import file as fileObj

But the downside is that when you want access to the imported files variable you have to first take fileObj.fileObjVariable.

user_99029020

Try adding/updating the environment variable PYTHONPATH which should point to the folder that has handshake.py

user_8518060

Just make sure the files all are located in the root of the project, then this will work:

import handshake
handshake.send_data(argument)
user_44260090
Related