gistfile1.txt

diff --git example/SmartlingApiExample.py example/SmartlingApiExample.py
index 0a9d570..743ee62 100644
--- example/SmartlingApiExample.py
+++ example/SmartlingApiExample.py
@@ -38,29 +38,29 @@ class SmartlingApiExample:
         self.new_name = new_name
 
     def printMarker(self, caption):
-        print "--" + caption + "-" * 40
+        print("--" + caption + "-" * 40)
 
     def test(self):
         self.printMarker("file upload")
-        print self.fapi.upload(self.uploadData)
+        print(self.fapi.upload(self.uploadData))
 
         self.printMarker("files list")
-        print self.fapi.list()
+        print(self.fapi.list())
 
         self.printMarker("file status")
-        print self.fapi.status(self.uploadData.name, self.locale)
+        print(self.fapi.status(self.uploadData.name, self.locale))
 
         self.printMarker("file from server goes here")
-        print self.fapi.get(self.uploadData.name, self.locale)
+        print(self.fapi.get(self.uploadData.name, self.locale))
 
         self.printMarker("renaming file")
-        print self.fapi.rename(self.uploadData.name, self.new_name)
+        print(self.fapi.rename(self.uploadData.name, self.new_name))
 
         self.printMarker("delete from server goes here")
-        print self.fapi.delete(self.new_name)
+        print(self.fapi.delete(self.new_name))
 
         self.printMarker("doing list again to see if it's deleted")
-        print self.fapi.list()
+        print(self.fapi.list())
 
 
 FILE_NAME = "java.properties"
diff --git smartlingApiSdk/FileApiBase.py smartlingApiSdk/FileApiBase.py
index b327d61..0a00207 100644
--- smartlingApiSdk/FileApiBase.py
+++ smartlingApiSdk/FileApiBase.py
@@ -15,11 +15,11 @@
 
 #FileApi class implementation
 
-import httplib
-import urllib
-import urllib2
-from MultipartPostHandler import MultipartPostHandler
-from Constants import Uri, Params, ReqMethod
+import http.client
+import urllib.request, urllib.parse, urllib.error
+import urllib.request, urllib.error, urllib.parse
+from .MultipartPostHandler import MultipartPostHandler
+from .Constants import Uri, Params, ReqMethod
 
 
 class FileApiBase:
@@ -36,18 +36,18 @@ class FileApiBase:
 
     def uploadMultipart(self, params):
         self.addApiKeys(params)
-        params[Params.FILE] = open(params[Params.FILE_PATH], 'rb')
+        params[Params.FILE] = open(params[Params.FILE_PATH], 'r')
         del params[Params.FILE_PATH]  # no need in extra field in POST
-        opener = urllib2.build_opener(MultipartPostHandler)
-        urllib2.install_opener(opener)
-        req = urllib2.Request('https://' + self.host + Uri.UPLOAD, params)
-        response = urllib2.urlopen(req).read().strip()
+        opener = urllib.request.build_opener(MultipartPostHandler)
+        urllib.request.install_opener(opener)
+        req = urllib.request.Request('https://' + self.host + Uri.UPLOAD, params)
+        response = urllib.request.urlopen(req).read().strip()
         return response
 
     def command(self, method, uri, params):
         self.addApiKeys(params)
-        params_encoded = urllib.urlencode(params)
-        conn = httplib.HTTPSConnection(self.host)
+        params_encoded = urllib.parse.urlencode(params)
+        conn = http.client.HTTPSConnection(self.host)
         conn.request(method, uri, params_encoded, self.headers)
         response = conn.getresponse()
         data = response.read()
diff --git smartlingApiSdk/MultipartPostHandler.py smartlingApiSdk/MultipartPostHandler.py
index feb1991..c374c96 100644
--- smartlingApiSdk/MultipartPostHandler.py
+++ smartlingApiSdk/MultipartPostHandler.py
@@ -13,11 +13,12 @@
  * limitations under the License.
 '''
 
-import mimetools
+import io
 import mimetypes
+import os
 import sys
-import urllib
-import urllib2
+import urllib.request, urllib.parse, urllib.error
+import urllib.request, urllib.error, urllib.parse
 
 
 class Callable:
@@ -25,44 +26,82 @@ class Callable:
         self.__call__ = anycallable
 
 
-class MultipartPostHandler(urllib2.BaseHandler):
-    handler_order = urllib2.HTTPHandler.handler_order - 10  # needs to run first
+class MultipartPostHandler(urllib.request.BaseHandler):
+    handler_order = urllib.request.HTTPHandler.handler_order - 10  # needs to run first
     # Controls how sequences are uncoded. If true, elements may be given multiple values by
     #  assigning a sequence.
     doseq = 1
+    _counter = 0
+    _prefix = None
+
+    # Code from Python stdlib mimetools.choose_boundary
+    # This was removed from the python lib in python 3
+    def _get_next_counter(self):
+        self._counter += 1
+        return self._counter
+
+    def choose_boundary(self):
+        """
+        Return a string usable as a multipart boundary.
+
+        The string chosen is unique within a single program run, and
+        incorporates the user id (if available), process id (if available),
+        and current time.  So it's very unlikely the returned string appears
+        in message text, but there's no guarantee.
+
+        The boundary contains dots so you have to quote it in the header.
+        """
+        import time
+        if self._prefix is None:
+            import socket
+            try:
+                hostid = socket.gethostbyname(socket.gethostname())
+            except socket.gaierror:
+                hostid = '127.0.0.1'
+            try:
+                uid = repr(os.getuid())
+            except AttributeError:
+                uid = '1'
+            try:
+                pid = repr(os.getpid())
+            except AttributeError:
+                pid = '1'
+            self._prefix = hostid + '.' + uid + '.' + pid
+        return "%s.%.3f.%d" % (self._prefix, time.time(),
+                               self._get_next_counter())
 
     def http_request(self, request):
-        data = request.get_data()
+        data = request.data
         if data is not None and type(data) != str:
             v_files = []
             v_vars = []
             try:
-                for(key, value) in data.items():
-                    if type(value) == file:
+                for(key, value) in list(data.items()):
+                    if isinstance(value, io.IOBase):
                         v_files.append((key, value))
                     else:
                         v_vars.append((key, value))
             except TypeError:
                 systype, value, traceback = sys.exc_info()
-                raise TypeError("not a valid non-string sequence or mapping object"), traceback
+                raise TypeError("not a valid non-string sequence or mapping object")(traceback)
 
             if len(v_files) == 0:
-                data = urllib.urlencode(v_vars, self.doseq)
+                data = urllib.parse.urlencode(v_vars, self.doseq)
             else:
                 boundary, data = self.multipart_encode(v_vars, v_files)
                 contenttype = 'multipart/form-data; boundary=%s' % boundary
 
                 if(request.has_header('Content-Type')
                    and request.get_header('Content-Type').find('multipart/form-data') != 0):
-                    print "Replacing %s with %s" % (request.get_header('content-type'), 'multipart/form-data')
+                    print("Replacing %s with %s" % (request.get_header('content-type'), 'multipart/form-data'))
                 request.add_unredirected_header('Content-Type', contenttype)
 
-            request.add_data(data)
+            request.data = data.encode('UTF-8')
         return request
 
-    def multipart_encode(vars, files, boundary=None, buffer=None):
+    def multipart_encode(self, vars, files, boundary=None, buffer=None):
         if boundary is None:
-            boundary = mimetools.choose_boundary()
+            boundary = self.choose_boundary()
         if buffer is None:
             buffer = ''
         for(key, value) in vars:
@@ -79,6 +118,5 @@ class MultipartPostHandler(urllib2.BaseHandler):
             buffer += '\r\n' + fd.read() + '\r\n'
         buffer += '--%s--\r\n\r\n' % boundary
         return boundary, buffer
-    multipart_encode = Callable(multipart_encode)
 
     https_request = http_request
diff --git smartlingApiSdk/SmartlingFileApi.py smartlingApiSdk/SmartlingFileApi.py
index 3a7686c..eadf593 100644
--- smartlingApiSdk/SmartlingFileApi.py
+++ smartlingApiSdk/SmartlingFileApi.py
@@ -15,7 +15,7 @@
 
 #FileApi class implementation
 
-from FileApiBase import FileApiBase
+from .FileApiBase import FileApiBase
 
 
 class SmartlingFileApi(FileApiBase):