Use relative imports, fixing installation with Python 3

Author: p-e-w

README.md

@@ -34,7 +34,13 @@ That being said, `maybe` **should :warning: NEVER :warning: be used to run untru
 pip install maybe
 ```
 
-either as a superuser or from a [virtualenv](https://virtualenv.pypa.io) environment.
+either as a superuser or from a [virtualenv](https://virtualenv.pypa.io) environment. To develop `maybe`, clone the repository and run
+
+```
+pip install -e .
+```
+
+in its main directory to install the package in editable mode.
 
 ### Operating system support
 

maybe/maybe.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 # maybe - see what a program does before deciding whether you really want it to happen
 #
 # Copyright (c) 2016 Philipp Emanuel Weidmann <[email protected]>
@@ -22,8 +20,8 @@
 from ptrace.syscall.posix_constants import SYSCALL_ARG_DICT
 from ptrace.syscall.syscall_argument import ARGUMENT_CALLBACK
 
-from syscall_filters import SYSCALL_FILTERS
-from utilities import T, SYSCALL_REGISTER, RETURN_VALUE_REGISTER
+from .syscall_filters import SYSCALL_FILTERS
+from .utilities import T, SYSCALL_REGISTER, RETURN_VALUE_REGISTER
 
 
 # Python 2/3 compatibility hack
@@ -182,7 +180,3 @@ def main():
     else:
         print("%s has not detected any file system operations from %s." %
               (T.bold("maybe"), T.bold(command)))
-
-
-if __name__ == "__main__":
-    main()

maybe/syscall_filters.py

@@ -14,7 +14,7 @@
 from os import O_WRONLY, O_RDWR, O_APPEND, O_CREAT, O_TRUNC
 from os.path import abspath, dirname, basename, exists
 
-from utilities import T, format_permissions
+from .utilities import T, format_permissions
 
 
 def return_zero(args):