# -*- coding: utf-8 -*-

"""

tools

=====

Functions that USERS will possibly want access to.

"""

from __future__ import absolute_import

import os

import os.path

import warnings

import six

import requests

from plotly import utils

from plotly import exceptions

from plotly import session

from plotly.graph_objs import graph_objs

# Warning format

def warning_on_one_line(message, category, filename, lineno, file=None, line=None):

return '%s:%s: %s:\n\n%s\n\n' % (filename, lineno, category.__name__, message)

warnings.formatwarning = warning_on_one_line

try:

from . import matplotlylib

_matplotlylib_imported = True

except ImportError:

_matplotlylib_imported = False

try:

import IPython

import IPython.core.display

_ipython_imported = True

except ImportError:

_ipython_imported = False

PLOTLY_DIR = os.path.join(os.path.expanduser("~"), ".plotly")

CREDENTIALS_FILE = os.path.join(PLOTLY_DIR, ".credentials")

CONFIG_FILE = os.path.join(PLOTLY_DIR, ".config")

TEST_DIR = os.path.join(os.path.expanduser("~"), ".test")

TEST_FILE = os.path.join(PLOTLY_DIR, ".permission_test")

# this sets both the DEFAULTS and the TYPES for these items

_FILE_CONTENT = {CREDENTIALS_FILE: {'username': '',

'api_key': '',

'proxy_username': '',

'proxy_password': '',

'api_key': '',

'stream_ids': []},

CONFIG_FILE: {'plotly_domain': 'https://plot.ly',

'plotly_streaming_domain': 'stream.plot.ly',

'plotly_api_domain': 'https://api.plot.ly',

'plotly_ssl_verification': True,

'plotly_proxy_authorization': False}}

try:

os.mkdir(TEST_DIR)

os.rmdir(TEST_DIR)

if not os.path.exists(PLOTLY_DIR):

os.mkdir(PLOTLY_DIR)

f = open(TEST_FILE, 'w')

f.write('testing\n')

f.close()

os.remove(TEST_FILE)

_file_permissions = True

except:

_file_permissions = False

def check_file_permissions():

return _file_permissions

def ensure_local_plotly_files():

"""Ensure that filesystem is setup/filled out in a valid way"""

if _file_permissions:

for fn in [CREDENTIALS_FILE, CONFIG_FILE]:

utils.ensure_file_exists(fn)

contents = utils.load_json_dict(fn)

for key, val in list(_FILE_CONTENT[fn].items()):

# TODO: removed type checking below, may want to revisit

if key not in contents:

contents[key] = val

contents_keys = list(contents.keys())

for key in contents_keys:

if key not in _FILE_CONTENT[fn]:

del contents[key]

utils.save_json_dict(fn, contents)

else:

warnings.warn("Looks like you don't have 'read-write' permission to "

"your 'home' ('~') directory or to our '~/.plotly' "

"directory. That means plotly's python api can't setup "

"local configuration files. No problem though! You'll "

"just have to sign-in using 'plotly.plotly.sign_in()'. For help "

"with that: 'help(plotly.plotly.sign_in)'."

"\nQuestions? support@plot.ly")

### credentials tools ###

def set_credentials_file(username=None,

api_key=None,

stream_ids=None,

proxy_username=None,

proxy_password=None):

"""Set the keyword-value pairs in `~/.plotly_credentials`.

:param (str) username: The username you'd use to sign in to Plotly

:param (str) api_key: The api key associated with above username

:param (list) stream_ids: Stream tokens for above credentials

:param (str) proxy_username: The un associated with with your Proxy

:param (str) proxy_password: The pw associated with your Proxy un

"""

if not _file_permissions:

raise exceptions.PlotlyError("You don't have proper file permissions "

"to run this function.")

ensure_local_plotly_files() # make sure what's there is OK

credentials = get_credentials_file()

if isinstance(username, six.string_types):

credentials['username'] = username

if isinstance(api_key, six.string_types):

credentials['api_key'] = api_key

if isinstance(proxy_username, six.string_types):

credentials['proxy_username'] = proxy_username

if isinstance(proxy_password, six.string_types):

credentials['proxy_password'] = proxy_password

if isinstance(stream_ids, (list, tuple)):

credentials['stream_ids'] = stream_ids

utils.save_json_dict(CREDENTIALS_FILE, credentials)

ensure_local_plotly_files() # make sure what we just put there is OK

def get_credentials_file(*args):

"""Return specified args from `~/.plotly_credentials`. as dict.

Returns all if no arguments are specified.

Example:

get_credentials_file('username')

"""

if _file_permissions:

ensure_local_plotly_files() # make sure what's there is OK

return utils.load_json_dict(CREDENTIALS_FILE, *args)

else:

return _FILE_CONTENT[CREDENTIALS_FILE]

def reset_credentials_file():

ensure_local_plotly_files() # make sure what's there is OK

utils.save_json_dict(CREDENTIALS_FILE, {})

ensure_local_plotly_files() # put the defaults back

### config tools ###

def set_config_file(plotly_domain=None,

plotly_streaming_domain=None,

plotly_api_domain=None,

plotly_ssl_verification=None,

plotly_proxy_authorization=None):

"""Set the keyword-value pairs in `~/.plotly/.config`.

:param (str) plotly_domain: ex - https://plot.ly

:param (str) plotly_streaming_domain: ex - stream.plot.ly

:param (str) plotly_api_domain: ex - https://api.plot.ly

:param (bool) plotly_ssl_verification: True = verify, False = don't verify

:param (bool) plotly_proxy_authorization: True = use plotly proxy auth creds

"""

if not _file_permissions:

raise exceptions.PlotlyError("You don't have proper file permissions "

"to run this function.")

ensure_local_plotly_files() # make sure what's there is OK

settings = get_config_file()

if isinstance(plotly_domain, six.string_types):

settings['plotly_domain'] = plotly_domain

if isinstance(plotly_streaming_domain, six.string_types):

settings['plotly_streaming_domain'] = plotly_streaming_domain

if isinstance(plotly_api_domain, six.string_types):

settings['plotly_api_domain'] = plotly_api_domain

if isinstance(plotly_ssl_verification, (six.string_types, bool)):

settings['plotly_ssl_verification'] = plotly_ssl_verification

if isinstance(plotly_proxy_authorization, (six.string_types, bool)):

settings['plotly_proxy_authorization'] = plotly_proxy_authorization

utils.save_json_dict(CONFIG_FILE, settings)

ensure_local_plotly_files() # make sure what we just put there is OK

def get_config_file(*args):

"""Return specified args from `~/.plotly_credentials`. as dict.

Returns all if no arguments are specified.

Example:

get_credentials_file('username')

"""

if _file_permissions:

ensure_local_plotly_files() # make sure what's there is OK

return utils.load_json_dict(CONFIG_FILE, *args)

else:

return _FILE_CONTENT[CONFIG_FILE]

def reset_config_file():

ensure_local_plotly_files() # make sure what's there is OK

f = open(CONFIG_FILE, 'w')

f.close()

ensure_local_plotly_files() # put the defaults back

### embed tools ###

def get_embed(file_owner_or_url, file_id=None, width="100%", height=525):

"""Returns HTML code to embed figure on a webpage as an <iframe>

Plotly uniquely identifies figures with a 'file_owner'/'file_id' pair.

Since each file is given a corresponding unique url, you may also simply

pass a valid plotly url as the first argument.

Note, if you're using a file_owner string as the first argument, you MUST

specify a `file_id` keyword argument. Else, if you're using a url string

as the first argument, you MUST NOT specify a `file_id` keyword argument,

or file_id must be set to Python's None value.

Positional arguments:

file_owner_or_url (string) -- a valid plotly username OR a valid plotly url

Keyword arguments:

file_id (default=None) -- an int or string that can be converted to int

if you're using a url, don't fill this in!

width (default="100%") -- an int or string corresp. to width of the figure

height (default="525") -- same as width but corresp. to the height of the

figure

"""

padding = 25

plotly_rest_url = (session.get_session_config().get('plotly_domain') or

get_config_file()['plotly_domain'])

if file_id is None: # assume we're using a url

url = file_owner_or_url

if url[:len(plotly_rest_url)] != plotly_rest_url:

raise exceptions.PlotlyError(

"Because you didn't supply a 'file_id' in the call, "

"we're assuming you're trying to snag a figure from a url. "

"You supplied the url, '{0}', we expected it to start with "

"'{1}'."

"\nRun help on this function for more information."

"".format(url, plotly_rest_url))

head = plotly_rest_url + "/~"

file_owner = url.replace(head, "").split('/')[0]

file_id = url.replace(head, "").split('/')[1]

else:

file_owner = file_owner_or_url

resource = "/apigetfile/{file_owner}/{file_id}".format(file_owner=file_owner,

file_id=file_id)

try:

test_if_int = int(file_id)

except ValueError:

raise exceptions.PlotlyError(

"The 'file_id' argument was not able to be converted into an "

"integer number. Make sure that the positional 'file_id' argument "

"is a number that can be converted into an integer or a string "

"that can be converted into an integer."

)

if int(file_id) < 0:

raise exceptions.PlotlyError(

"The 'file_id' argument must be a non-negative number."

)

if isinstance(width, int):

s = ("<iframe id=\"igraph\" scrolling=\"no\" style=\"border:none;\""

"seamless=\"seamless\" "

"src=\"{plotly_rest_url}/"

"~{file_owner}/{file_id}.embed"

"?width={plot_width}&height={plot_height}\" "

"height=\"{iframe_height}\" width=\"{iframe_width}\">"

"</iframe>").format(

plotly_rest_url=plotly_rest_url,

file_owner=file_owner, file_id=file_id,

plot_width=width-padding, plot_height=height-padding,

iframe_height=height, iframe_width=width)

else:

s = ("<iframe id=\"igraph\" scrolling=\"no\" style=\"border:none;\""

"seamless=\"seamless\" "

"src=\"{plotly_rest_url}/"

"~{file_owner}/{file_id}.embed\" "

"height=\"{iframe_height}\" width=\"{iframe_width}\">"

"</iframe>").format(

plotly_rest_url=plotly_rest_url,

file_owner=file_owner, file_id=file_id,

iframe_height=height, iframe_width=width)

return s

def embed(file_owner_or_url, file_id=None, width="100%", height=525):

"""Embeds existing Plotly figure in IPython Notebook

Plotly uniquely identifies figures with a 'file_owner'/'file_id' pair.

Since each file is given a corresponding unique url, you may also simply

pass a valid plotly url as the first argument.

Note, if you're using a file_owner string as the first argument, you MUST

specify a `file_id` keyword argument. Else, if you're using a url string

as the first argument, you MUST NOT specify a `file_id` keyword argument, or

file_id must be set to Python's None value.

Positional arguments:

file_owner_or_url (string) -- a valid plotly username OR a valid plotly url

Keyword arguments:

file_id (default=None) -- an int or string that can be converted to int

if you're using a url, don't fill this in!

width (default="100%") -- an int or string corresp. to width of the figure

height (default="525") -- same as width but corresp. to the height of the figure

"""

try:

s = get_embed(file_owner_or_url, file_id, width, height)

# see if we are in the SageMath Cloud

from sage_salvus import html

return html(s, hide=False)

except:

pass

if _ipython_imported:

if file_id:

plotly_domain = (

session.get_session_config().get('plotly_domain') or

get_config_file()['plotly_domain']

)

url = "{plotly_domain}/~{un}/{fid}".format(

plotly_domain=plotly_domain,

un=file_owner_or_url,

fid=file_id)

else:

url = file_owner_or_url

return PlotlyDisplay(url, width, height)

else:

warnings.warn(

"Looks like you're not using IPython or Sage to embed this plot. "

"If you just want the *embed code*, try using `get_embed()` "

"instead."

"\nQuestions? support@plot.ly")

### mpl-related tools ###

@utils.template_doc(**get_config_file())

def mpl_to_plotly(fig, resize=False, strip_style=False, verbose=False):

"""Convert a matplotlib figure to plotly dictionary and send.

All available information about matplotlib visualizations are stored

within a matplotlib.figure.Figure object. You can create a plot in python

using matplotlib, store the figure object, and then pass this object to

the fig_to_plotly function. In the background, mplexporter is used to

crawl through the mpl figure object for appropriate information. This

information is then systematically sent to the PlotlyRenderer which

creates the JSON structure used to make plotly visualizations. Finally,

these dictionaries are sent to plotly and your browser should open up a

new tab for viewing! Optionally, if you're working in IPython, you can

set notebook=True and the PlotlyRenderer will call plotly.iplot instead

of plotly.plot to have the graph appear directly in the IPython notebook.

Note, this function gives the user access to a simple, one-line way to

render an mpl figure in plotly. If you need to trouble shoot, you can do

this step manually by NOT running this fuction and entereing the following:

===========================================================================

from mplexporter import Exporter

from mplexporter.renderers import PlotlyRenderer

# create an mpl figure and store it under a varialble 'fig'

renderer = PlotlyRenderer()

exporter = Exporter(renderer)

exporter.run(fig)

===========================================================================

You can then inspect the JSON structures by accessing these:

renderer.layout -- a plotly layout dictionary

renderer.data -- a list of plotly data dictionaries

Positional arguments:

fig -- a matplotlib figure object

username -- a valid plotly username **

api_key -- a valid api_key for the above username **

notebook -- an option for use with an IPython notebook

** Don't have a username/api_key? Try looking here:

{plotly_domain}/plot

** Forgot your api_key? Try signing in and looking here:

{plotly_domain}/python/getting-started

"""

if _matplotlylib_imported:

renderer = matplotlylib.PlotlyRenderer()

matplotlylib.Exporter(renderer).run(fig)

if resize:

renderer.resize()

if strip_style:

renderer.strip_style()

if verbose:

print(renderer.msg)

return renderer.plotly_fig

else:

warnings.warn(

"To use Plotly's matplotlylib functionality, you'll need to have "

"matplotlib successfully installed with all of its dependencies. "

"You're getting this error because matplotlib or one of its "

"dependencies doesn't seem to be installed correctly.")

### graph_objs related tools ###

def get_subplots(rows=1, columns=1, print_grid=False, **kwargs):

"""Return a dictionary instance with the subplots set in 'layout'.

Example 1:

# stack two subplots vertically

fig = tools.get_subplots(rows=2)

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x1', yaxis='y1')]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x2', yaxis='y2')]

Example 2:

# print out string showing the subplot grid you've put in the layout

fig = tools.get_subplots(rows=3, columns=2, print_grid=True)

Keywords arguments with constant defaults:

rows (kwarg, int greater than 0, default=1):

Number of rows, evenly spaced vertically on the figure.

columns (kwarg, int greater than 0, default=1):

Number of columns, evenly spaced horizontally on the figure.

horizontal_spacing (kwarg, float in [0,1], default=0.1):

Space between subplot columns. Applied to all columns.

vertical_spacing (kwarg, float in [0,1], default=0.05):

Space between subplot rows. Applied to all rows.

print_grid (kwarg, True | False, default=False):

If True, prints a tab-delimited string representation

of your plot grid.

Keyword arguments with variable defaults:

horizontal_spacing (kwarg, float in [0,1], default=0.2 / columns):

Space between subplot columns.

vertical_spacing (kwarg, float in [0,1], default=0.3 / rows):

Space between subplot rows.

"""

warnings.warn(

"tools.get_subplots is depreciated. "

"Please use tools.make_subplots instead."

)

# Throw exception for non-integer rows and columns

if not isinstance(rows, int) or rows <= 0:

raise Exception("Keyword argument 'rows' "

"must be an int greater than 0")

if not isinstance(columns, int) or columns <= 0:

raise Exception("Keyword argument 'columns' "

"must be an int greater than 0")

# Throw exception if non-valid kwarg is sent

VALID_KWARGS = ['horizontal_spacing', 'vertical_spacing']

for key in kwargs.keys():

if key not in VALID_KWARGS:

raise Exception("Invalid keyword argument: '{0}'".format(key))

# Set 'horizontal_spacing' / 'vertical_spacing' w.r.t. rows / columns

try:

horizontal_spacing = float(kwargs['horizontal_spacing'])

except KeyError:

horizontal_spacing = 0.2 / columns

try:

vertical_spacing = float(kwargs['vertical_spacing'])

except KeyError:

vertical_spacing = 0.3 / rows

fig = dict(layout=graph_objs.Layout()) # will return this at the end

plot_width = (1 - horizontal_spacing * (columns - 1)) / columns

plot_height = (1 - vertical_spacing * (rows - 1)) / rows

plot_num = 0

for rrr in range(rows):

for ccc in range(columns):

xaxis_name = 'xaxis{0}'.format(plot_num + 1)

x_anchor = 'y{0}'.format(plot_num + 1)

x_start = (plot_width + horizontal_spacing) * ccc

x_end = x_start + plot_width

yaxis_name = 'yaxis{0}'.format(plot_num + 1)

y_anchor = 'x{0}'.format(plot_num + 1)

y_start = (plot_height + vertical_spacing) * rrr

y_end = y_start + plot_height

xaxis = graph_objs.XAxis(domain=[x_start, x_end], anchor=x_anchor)

fig['layout'][xaxis_name] = xaxis

yaxis = graph_objs.YAxis(domain=[y_start, y_end], anchor=y_anchor)

fig['layout'][yaxis_name] = yaxis

plot_num += 1

if print_grid:

print("This is the format of your plot grid!")

grid_string = ""

plot = 1

for rrr in range(rows):

grid_line = ""

for ccc in range(columns):

grid_line += "[{0}]\t".format(plot)

plot += 1

grid_string = grid_line + '\n' + grid_string

print(grid_string)

return graph_objs.Figure(fig) # forces us to validate what we just did...

def make_subplots(rows=1, cols=1,

shared_xaxes=False, shared_yaxes=False,

start_cell='top-left', print_grid=True,

**kwargs):

"""Return an instance of plotly.graph_objs.Figure

with the subplots domain set in 'layout'.

Example 1:

# stack two subplots vertically

fig = tools.make_subplots(rows=2)

This is the format of your plot grid:

[ (1,1) x1,y1 ]

[ (2,1) x2,y2 ]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2])]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x2', yaxis='y2')]

# or see Figure.append_trace

Example 2:

# subplots with shared x axes

fig = tools.make_subplots(rows=2, shared_xaxes=True)

This is the format of your plot grid:

[ (1,1) x1,y1 ]

[ (2,1) x1,y2 ]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2])]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], yaxis='y2')]

Example 3:

# irregular subplot layout (more examples below under 'specs')

fig = tools.make_subplots(rows=2, cols=2,

specs=[[{}, {}],

[{'colspan': 2}, None]])

This is the format of your plot grid!

[ (1,1) x1,y1 ] [ (1,2) x2,y2 ]

[ (2,1) x3,y3 - ]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2])]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x2', yaxis='y2')]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x3', yaxis='y3')]

Example 4:

# insets

fig = tools.make_subplots(insets=[{'cell': (1,1), 'l': 0.7, 'b': 0.3}])

This is the format of your plot grid!

[ (1,1) x1,y1 ]

With insets:

[ x2,y2 ] over [ (1,1) x1,y1 ]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2])]

fig['data'] += [Scatter(x=[1,2,3], y=[2,1,2], xaxis='x2', yaxis='y2')]

Keywords arguments with constant defaults:

rows (kwarg, int greater than 0, default=1):

Number of rows in the subplot grid.

cols (kwarg, int greater than 0, default=1):

Number of columns in the subplot grid.

shared_xaxes (kwarg, boolean or list, default=False)

Assign shared x axes.

If True, subplots in the same grid column have one common

shared x-axis at the bottom of the gird.

To assign shared x axes per subplot grid cell (see 'specs'),

send list (or list of lists, one list per shared x axis)

of cell index tuples.

shared_yaxes (kwarg, boolean or list, default=False)

Assign shared y axes.

If True, subplots in the same grid row have one common

shared y-axis on the left-hand side of the gird.

To assign shared y axes per subplot grid cell (see 'specs'),

send list (or list of lists, one list per shared y axis)

of cell index tuples.

start_cell (kwarg, 'bottom-left' or 'top-left', default='top-left')

Choose the starting cell in the subplot grid used to set the

domains of the subplots.

print_grid (kwarg, boolean, default=True):

If True, prints a tab-delimited string representation of

your plot grid.

Keyword arguments with variable defaults:

horizontal_spacing (kwarg, float in [0,1], default=0.2 / cols):

Space between subplot columns.

Applies to all columns (use 'specs' subplot-dependents spacing)

vertical_spacing (kwarg, float in [0,1], default=0.3 / rows):

Space between subplot rows.

Applies to all rows (use 'specs' subplot-dependents spacing)

specs (kwarg, list of lists of dictionaries):

Subplot specifications.

ex1: specs=[[{}, {}], [{'colspan': 2}, None]]

ex2: specs=[[{'rowspan': 2}, {}], [None, {}]]

- Indices of the outer list correspond to subplot grid rows

starting from the bottom. The number of rows in 'specs'

must be equal to 'rows'.

- Indices of the inner lists correspond to subplot grid columns

starting from the left. The number of columns in 'specs'

must be equal to 'cols'.

- Each item in the 'specs' list corresponds to one subplot

in a subplot grid. (N.B. The subplot grid has exactly 'rows'

times 'cols' cells.)

- Use None for blank a subplot cell (or to move pass a col/row span).

- Note that specs[0][0] has the specs of the 'start_cell' subplot.

- Each item in 'specs' is a dictionary.

The available keys are:

* is_3d (boolean, default=False): flag for 3d scenes

* colspan (int, default=1): number of subplot columns

for this subplot to span.

* rowspan (int, default=1): number of subplot rows

for this subplot to span.

* l (float, default=0.0): padding left of cell

* r (float, default=0.0): padding right of cell

* t (float, default=0.0): padding right of cell

* b (float, default=0.0): padding bottom of cell

- Use 'horizontal_spacing' and 'vertical_spacing' to adjust

the spacing in between the subplots.

insets (kwarg, list of dictionaries):

Inset specifications.

- Each item in 'insets' is a dictionary.

The available keys are:

* cell (tuple, default=(1,1)): (row, col) index of the

subplot cell to overlay inset axes onto.

* is_3d (boolean, default=False): flag for 3d scenes

* l (float, default=0.0): padding left of inset

in fraction of cell width

* w (float or 'to_end', default='to_end') inset width

in fraction of cell width ('to_end': to cell right edge)

* b (float, default=0.0): padding bottom of inset

in fraction of cell height

* h (float or 'to_end', default='to_end') inset height

in fraction of cell height ('to_end': to cell top edge)

"""

# Throw exception for non-integer rows and cols

if not isinstance(rows, int) or rows <= 0:

raise Exception("Keyword argument 'rows' "

"must be an int greater than 0")

if not isinstance(cols, int) or cols <= 0:

raise Exception("Keyword argument 'cols' "

"must be an int greater than 0")

# Dictionary of things start_cell

START_CELL_all = {

'bottom-left': {

# 'natural' setup where x & y domains increase monotonically

'col_dir': 1,

'row_dir': 1

},

'top-left': {

# 'default' setup visually matching the 'specs' list of lists

'col_dir': 1,

'row_dir': -1

}

# TODO maybe add 'bottom-right' and 'top-right'

}

# Throw exception for invalid 'start_cell' values

try:

START_CELL = START_CELL_all[start_cell]

except KeyError:

raise Exception("Invalid 'start_cell' value")

# Throw exception if non-valid kwarg is sent

VALID_KWARGS = ['horizontal_spacing', 'vertical_spacing',

'specs', 'insets']

for key in kwargs.keys():

if key not in VALID_KWARGS:

raise Exception("Invalid keyword argument: '{0}'".format(key))

# Set 'horizontal_spacing' / 'vertical_spacing' w.r.t. rows / cols

try:

horizontal_spacing = float(kwargs['horizontal_spacing'])

except KeyError:

horizontal_spacing = 0.2 / cols

try:

vertical_spacing = float(kwargs['vertical_spacing'])

except KeyError:

vertical_spacing = 0.3 / rows

# Sanitize 'specs' (must be a list of lists)

exception_msg = "Keyword argument 'specs' must be a list of lists"

try:

specs = kwargs['specs']

if not isinstance(specs, list):

raise Exception(exception_msg)

else:

for spec_row in specs:

if not isinstance(spec_row, list):

raise Exception(exception_msg)

except KeyError:

specs = [[{}

for c in range(cols)]

for r in range(rows)] # default 'specs'

# Throw exception if specs is over or under specified

if len(specs) != rows:

raise Exception("The number of rows in 'specs' "

"must be equal to 'rows'")

for r, spec_row in enumerate(specs):

if len(spec_row) != cols:

raise Exception("The number of columns in 'specs' "

"must be equal to 'cols'")

# Sanitize 'insets'

try:

insets = kwargs['insets']

if not isinstance(insets, list):

raise Exception("Keyword argument 'insets' must be a list")

except KeyError:

insets = False

# Throw exception if non-valid key / fill in defaults

def _check_keys_and_fill(name, arg, defaults):

def _checks(item, defaults):

if item is None:

return

if not isinstance(item, dict):

raise Exception("Items in keyword argument '{name}' must be "

"dictionaries or None".format(name=name))

for k in item.keys():

if k not in defaults.keys():

raise Exception("Invalid key '{k}' in keyword "

"argument '{name}'".format(k=k, name=name))

for k in defaults.keys():

if k not in item.keys():

item[k] = defaults[k]

for arg_i in arg:

if isinstance(arg_i, list):

for arg_ii in arg_i:

_checks(arg_ii, defaults)

elif isinstance(arg_i, dict):

_checks(arg_i, defaults)

# Default spec key-values

SPEC_defaults = dict(

is_3d=False,

colspan=1,

rowspan=1,

l=0.0,

r=0.0,

b=0.0,

t=0.0

# TODO add support for 'w' and 'h'

)

_check_keys_and_fill('specs', specs, SPEC_defaults)

# Default inset key-values

if insets:

INSET_defaults = dict(

cell=(1, 1),

is_3d=False,

l=0.0,

w='to_end',

b=0.0,

h='to_end'

)

_check_keys_and_fill('insets', insets, INSET_defaults)

# Set width & height of each subplot cell (excluding padding)

width = (1. - horizontal_spacing * (cols - 1)) / cols

height = (1. - vertical_spacing * (rows - 1)) / rows

# Built row/col sequence using 'row_dir' and 'col_dir'

COL_DIR = START_CELL['col_dir']

ROW_DIR = START_CELL['row_dir']

col_seq = range(cols)[::COL_DIR]

row_seq = range(rows)[::ROW_DIR]

# [grid] Build subplot grid (coord tuple of cell)

grid = [[((width + horizontal_spacing) * c,

(height + vertical_spacing) * r)

for c in col_seq]

for r in row_seq]

# [grid_ref] Initialize the grid and insets' axis-reference lists

grid_ref = [[None for c in range(cols)] for r in range(rows)]

insets_ref = [None for inset in range(len(insets))] if insets else None

layout = graph_objs.Layout() # init layout object

# Function handling logic around 2d axis labels

# Returns 'x{}' | 'y{}'

def _get_label(x_or_y, r, c, cnt, shared_axes):

# Default label (given strictly by cnt)

label = "{x_or_y}{cnt}".format(x_or_y=x_or_y, cnt=cnt)

if isinstance(shared_axes, bool):

if shared_axes:

if x_or_y == 'x':

label = "{x_or_y}{c}".format(x_or_y=x_or_y, c=c+1)

if x_or_y == 'y':

label = "{x_or_y}{r}".format(x_or_y=x_or_y, r=r+1)

if isinstance(shared_axes, list):

if isinstance(shared_axes[0], tuple):

shared_axes = [shared_axes] # TODO put this elsewhere

for shared_axis in shared_axes:

if (r+1, c+1) in shared_axis:

label = {

'x': "x{0}".format(shared_axis[0][1]),

'y': "y{0}".format(shared_axis[0][0])

}[x_or_y]

return label

# Row in grid of anchor row if shared_xaxes=True

ANCHOR_ROW = 0 if ROW_DIR > 0 else rows - 1

# Function handling logic around 2d axis anchors

# Return 'x{}' | 'y{}' | 'free' | False

def _get_anchors(r, c, x_cnt, y_cnt, shared_xaxes, shared_yaxes):

# Default anchors (give strictly by cnt)

x_anchor = "y{y_cnt}".format(y_cnt=y_cnt)

y_anchor = "x{x_cnt}".format(x_cnt=x_cnt)

if isinstance(shared_xaxes, bool):

if shared_xaxes:

if r != ANCHOR_ROW:

x_anchor = False

y_anchor = 'free'

if shared_yaxes and c != 0: # TODO covers all cases?

y_anchor = False

return x_anchor, y_anchor

elif isinstance(shared_xaxes, list):

if isinstance(shared_xaxes[0], tuple):

shared_xaxes = [shared_xaxes] # TODO put this elsewhere

for shared_xaxis in shared_xaxes:

if (r+1, c+1) in shared_xaxis[1:]:

x_anchor = False

y_anchor = 'free' # TODO covers all cases?

if isinstance(shared_yaxes, bool):

if shared_yaxes:

if c != 0:

y_anchor = False

x_anchor = 'free'

if shared_xaxes and r != ANCHOR_ROW: # TODO all cases?

x_anchor = False

return x_anchor, y_anchor

elif isinstance(shared_yaxes, list):

if isinstance(shared_yaxes[0], tuple):

shared_yaxes = [shared_yaxes] # TODO put this elsewhere

for shared_yaxis in shared_yaxes:

if (r+1, c+1) in shared_yaxis[1:]:

y_anchor = False

x_anchor = 'free' # TODO covers all cases?

return x_anchor, y_anchor

# Function pasting x/y domains in layout object (2d case)

def _add_domain(layout, x_or_y, label, domain, anchor, position):

name = label[0] + 'axis' + label[1:]

graph_obj = '{X_or_Y}Axis'.format(X_or_Y=x_or_y.upper())

axis = getattr(graph_objs, graph_obj)(domain=domain)

if anchor:

axis['anchor'] = anchor

if isinstance(position, float):

axis['position'] = position

layout[name] = axis

# Function pasting x/y domains in layout object (3d case)

def _add_domain_is_3d(layout, s_label, x_domain, y_domain):

scene = graph_objs.Scene(domain={'x': x_domain, 'y': y_domain})

layout[s_label] = scene

x_cnt = y_cnt = s_cnt = 1 # subplot axis/scene counters

# Loop through specs -- (r, c) <-> (row, col)

for r, spec_row in enumerate(specs):

for c, spec in enumerate(spec_row):

if spec is None: # skip over None cells

continue

c_spanned = c + spec['colspan'] - 1 # get spanned c

r_spanned = r + spec['rowspan'] - 1 # get spanned r

# Throw exception if 'colspan' | 'rowspan' is too large for grid

if c_spanned >= cols:

raise Exception("Some 'colspan' value is too large for "

"this subplot grid.")

if r_spanned >= rows:

raise Exception("Some 'rowspan' value is too large for "

"this subplot grid.")

# Get x domain using grid and colspan

x_s = grid[r][c][0] + spec['l']

x_e = grid[r][c_spanned][0] + width - spec['r']

x_domain = [x_s, x_e]

# Get y domain (dep. on row_dir) using grid & r_spanned

if ROW_DIR > 0:

y_s = grid[r][c][1] + spec['b']

y_e = grid[r_spanned][c][1] + height - spec['t']

else:

y_s = grid[r_spanned][c][1] + spec['b']

y_e = grid[r][c][1] + height - spec['t']

y_domain = [y_s, y_e]

if spec['is_3d']:

# Add scene to layout

s_label = 'scene{0}'.format(s_cnt)

_add_domain_is_3d(layout, s_label, x_domain, y_domain)

grid_ref[r][c] = (s_label, )

s_cnt += 1

else:

# Get axis label and anchor

x_label = _get_label('x', r, c, x_cnt, shared_xaxes)

y_label = _get_label('y', r, c, y_cnt, shared_yaxes)

x_anchor, y_anchor = _get_anchors(r, c,

x_cnt, y_cnt,

shared_xaxes,

shared_yaxes)

# Add a xaxis to layout (N.B anchor == False -> no axis)

if x_anchor:

if x_anchor == 'free':

x_position = y_domain[0]

else:

x_position = False

_add_domain(layout, 'x', x_label, x_domain,

x_anchor, x_position)

x_cnt += 1

# Add a yaxis to layout (N.B anchor == False -> no axis)

if y_anchor:

if y_anchor == 'free':

y_position = x_domain[0]

else:

y_position = False

_add_domain(layout, 'y', y_label, y_domain,

y_anchor, y_position)

y_cnt += 1

grid_ref[r][c] = (x_label, y_label) # fill in ref

# Loop through insets

if insets: