Remove unused os import

IPython/nbformat/v3/nbbase.py

@@ -1,206 +1,205 b''
 """The basic dict based notebook format.
 
 The Python representation of a notebook is a nested structure of
 dictionary subclasses that support attribute access
 (IPython.utils.ipstruct.Struct). The functions in this module are merely
 helpers to build the structs in the right form.
 """
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 import pprint
 import uuid
-import os
 
 from IPython.utils.ipstruct import Struct
 from IPython.utils.py3compat import cast_unicode, unicode_type
 
 #-----------------------------------------------------------------------------
 # Code
 #-----------------------------------------------------------------------------
 
 # Change this when incrementing the nbformat version
 nbformat = 3
 nbformat_minor = 0
 nbformat_schema = 'v3.withref.json'
 
 class NotebookNode(Struct):
     pass
 
 
 def from_dict(d):
     if isinstance(d, dict):
         newd = NotebookNode()
         for k,v in d.items():
             newd[k] = from_dict(v)
         return newd
     elif isinstance(d, (tuple, list)):
         return [from_dict(i) for i in d]
     else:
         return d
 
 
 def new_output(output_type, output_text=None, output_png=None,
     output_html=None, output_svg=None, output_latex=None, output_json=None,
     output_javascript=None, output_jpeg=None, prompt_number=None,
     ename=None, evalue=None, traceback=None, stream=None, metadata=None):
     """Create a new output, to go in the ``cell.outputs`` list of a code cell.
     """
     output = NotebookNode()
     output.output_type = unicode_type(output_type)
 
     if metadata is None:
         metadata = {}
     if not isinstance(metadata, dict):
         raise TypeError("metadata must be dict")
     output.metadata = metadata
 
     if output_type != 'pyerr':
         if output_text is not None:
             output.text = cast_unicode(output_text)
         if output_png is not None:
             output.png = cast_unicode(output_png)
         if output_jpeg is not None:
             output.jpeg = cast_unicode(output_jpeg)
         if output_html is not None:
             output.html = cast_unicode(output_html)
         if output_svg is not None:
             output.svg = cast_unicode(output_svg)
         if output_latex is not None:
             output.latex = cast_unicode(output_latex)
         if output_json is not None:
             output.json = cast_unicode(output_json)
         if output_javascript is not None:
             output.javascript = cast_unicode(output_javascript)
 
     if output_type == u'pyout':
         if prompt_number is not None:
             output.prompt_number = int(prompt_number)
 
     if output_type == u'pyerr':
         if ename is not None:
             output.ename = cast_unicode(ename)
         if evalue is not None:
             output.evalue = cast_unicode(evalue)
         if traceback is not None:
             output.traceback = [cast_unicode(frame) for frame in list(traceback)]
 
     if output_type == u'stream':
         output.stream = 'stdout' if stream is None else cast_unicode(stream)
     
     return output
 
 
 def new_code_cell(input=None, prompt_number=None, outputs=None,
     language=u'python', collapsed=False, metadata=None):
     """Create a new code cell with input and output"""
     cell = NotebookNode()
     cell.cell_type = u'code'
     if language is not None:
         cell.language = cast_unicode(language)
     if input is not None:
         cell.input = cast_unicode(input)
     if prompt_number is not None:
         cell.prompt_number = int(prompt_number)
     if outputs is None:
         cell.outputs = []
     else:
         cell.outputs = outputs
     if collapsed is not None:
         cell.collapsed = bool(collapsed)
     cell.metadata = NotebookNode(metadata or {})
 
     return cell
 
 def new_text_cell(cell_type, source=None, rendered=None, metadata=None):
     """Create a new text cell."""
     cell = NotebookNode()
     # VERSIONHACK: plaintext -> raw
     # handle never-released plaintext name for raw cells
     if cell_type == 'plaintext':
         cell_type = 'raw'
     if source is not None:
         cell.source = cast_unicode(source)
     if rendered is not None:
         cell.rendered = cast_unicode(rendered)
     cell.metadata = NotebookNode(metadata or {})
     cell.cell_type = cell_type
     return cell
 
 
 def new_heading_cell(source=None, rendered=None, level=1, metadata=None):
     """Create a new section cell with a given integer level."""
     cell = NotebookNode()
     cell.cell_type = u'heading'
     if source is not None:
         cell.source = cast_unicode(source)
     if rendered is not None:
         cell.rendered = cast_unicode(rendered)
     cell.level = int(level)
     cell.metadata = NotebookNode(metadata or {})
     return cell
 
 
 def new_worksheet(name=None, cells=None, metadata=None):
     """Create a worksheet by name with with a list of cells."""
     ws = NotebookNode()
     if name is not None:
         ws.name = cast_unicode(name)
     if cells is None:
         ws.cells = []
     else:
         ws.cells = list(cells)
     ws.metadata = NotebookNode(metadata or {})
     return ws
 
 
 def new_notebook(name=None, metadata=None, worksheets=None):
     """Create a notebook by name, id and a list of worksheets."""
     nb = NotebookNode()
     nb.nbformat = nbformat
     nb.nbformat_minor = nbformat_minor
     if worksheets is None:
         nb.worksheets = []
     else:
         nb.worksheets = list(worksheets)
     if metadata is None:
         nb.metadata = new_metadata()
     else:
         nb.metadata = NotebookNode(metadata)
     if name is not None:
         nb.metadata.name = cast_unicode(name)
     return nb
 
 
 def new_metadata(name=None, authors=None, license=None, created=None,
     modified=None, gistid=None):
     """Create a new metadata node."""
     metadata = NotebookNode()
     if name is not None:
         metadata.name = cast_unicode(name)
     if authors is not None:
         metadata.authors = list(authors)
     if created is not None:
         metadata.created = cast_unicode(created)
     if modified is not None:
         metadata.modified = cast_unicode(modified)
     if license is not None:
         metadata.license = cast_unicode(license)
     if gistid is not None:
         metadata.gistid = cast_unicode(gistid)
     return metadata
 
 def new_author(name=None, email=None, affiliation=None, url=None):
     """Create a new author."""
     author = NotebookNode()
     if name is not None:
         author.name = cast_unicode(name)
     if email is not None:
         author.email = cast_unicode(email)
     if affiliation is not None:
         author.affiliation = cast_unicode(affiliation)
     if url is not None:
         author.url = cast_unicode(url)
     return author