python - Unable to import a class in unittest -

this beginner question i'm pulling hair out.

i have simple python script "foo":

#!/usr/bin/env python  class foo():   def __init__(self):     self.do_something()    def do_something(self):     print "foo"  def main():   foo()  if __name__ == '__main__':   main() 

script works fine:

$ python foo.py  foo 

i want test function "do_something" in unittest , have code:

#!/usr/bin/env python  import unittest import foo foo import *  class testfoo(unittest.testcase):   def test_foo(self):     foo()  def main():   unittest.main()  if __name__ == "__main__":   main() 

if run tests, however, get:

$ python pyunit/foo.py e ====================================================================== error: test_foo (__main__.testfoo) ---------------------------------------------------------------------- traceback (most recent call last):   file "pyunit/foo.py", line 9, in test_foo     foo() nameerror: global name 'foo' not defined  ---------------------------------------------------------------------- ran 1 test in 0.000s  failed (errors=1) 

my project structure:

$ tree  . ├── foo.py └── pyunit     └── foo.py 

i have been playing around inspect, dir(), python debugger etc i'm getting nowhere.

although import foo , from foo import * both execute fine, , see function main imported file, class foo doesn't seem imported.

my objective, ultimately, write unit tests functions in class foo.

what doing wrong?

you shouldn't use same file name (foo.py) in module. change test module test_foo instead. explicit better implicit.

when importing module parent directory, need use from <parent_dir> import <module_name>, in case should state from <parent_dir> import foo

you encounter importerror: no module named foo error becuase module not part of sys.path.

simplest way import local directory python's lookup path:

import sys sys.path.append('.') 

before other import statements. append project dir path. if have multiple classes same name, better use sys.path.insert(0, '.') push path first position