Python code for loading files from notebook

viewer.py

import IPython

def getViewerURL(file, subdir, cmap, range, imageWidth):    
    serverUrl = "https://viewer.idia.ac.za?"
    if (len(subdir)):
        serverUrl += "subdir={}&".format(subdir)
    if (len(file)):
        serverUrl += "file={}&".format(file)
    if (len(cmap)):
        serverUrl += "cmap={}&".format(cmap)
    if (range>0):
        serverUrl += "range={}&".format(range)
    if (imageWidth!= 640):
        serverUrl += "width={}&".format(imageWidth)
    return serverUrl

def showViewer(file="", subdir="", cmap="", range=0, imageWidth=640, frameHeight=800):    
    serverUrl = getViewerURL(file, subdir, cmap, range, imageWidth)   
    iframe = "<iframe src={} width=100% height={}></iframe>".format(serverUrl, frameHeight)
    outputFrame = IPython.display.HTML(iframe)
    return outputFrame

def showViewerUrl(file="", subdir="", cmap="", range=0, imageWidth=640):    
    serverUrl = getViewerURL(file, subdir, cmap, range, imageWidth)   
    outputFrame = IPython.display.HTML("<a target='_blank' href={}>Viewer</a>".format(serverUrl))
    return outputFrame

def openViewerNewTab(file="", subdir="", cmap="", range=0, imageWidth=640):    
    serverUrl = getViewerURL(file, subdir, cmap, range, imageWidth)
    s  = '<script type="text/Javascript">'
    s += 'window.open("{}");'.format(serverUrl)
    s += '</script>'
    return IPython.display.HTML(s)
  
# parameters:
# file: the file to load
# subdir: limit the file list to a specific subdirectory that the viewer server is watching
# cmap: the colour map to use
# range: the percentile range to use
# imageWidth: the width of the image display in the viewer
# (notebook cell only) frameHeight: the height of the output cell in notebook
# example use:
#
# Generates a clickable link to the viewer based on input parameter.
# showViewerUrl(file="LMCq.hdf5", subdir="angus", cmap="viridis", range=99.9)
#
# Opens the viewer in a new tab (popup blocking will have to be disabled for the notebook domain
# openViewerNewTab(subdir="angus", cmap="viridis", range=99.9)
# 
# Opens the viewer in the notebook itself as an output
# showViewer(file="LMCq.hdf5", subdir="angus", cmap="viridis", range=99.9)